539 lines
15 KiB
Lua
539 lines
15 KiB
Lua
-- $Id: errors.lua,v 1.94 2016/12/21 19:23:02 roberto Exp $
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-- See Copyright Notice in file all.lua
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print("testing errors")
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local debug = require"debug"
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--[[ NodeMCU: uses getmetatable(_G) so remove this check
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-- avoid problems with 'strict' module (which may generate other error messages)
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local mt = getmetatable(_G) or {}
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local oldmm = mt.__index
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mt.__index = nil
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]]
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local function checkerr (msg, f, ...)
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local st, err = pcall(f, ...)
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assert(not st and string.find(err, msg))
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end
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local function doit (s)
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local f, msg = load(s)
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if f == nil then return msg end
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local cond, msg = pcall(f)
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return (not cond) and msg
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end
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local function checkmessage (prog, msg)
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local m = doit(prog)
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assert(string.find(m, msg, 1, true))
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end
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local function checksyntax (prog, extra, token, line)
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local msg = doit(prog)
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if not string.find(token, "^<%a") and not string.find(token, "^char%(")
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then token = "'"..token.."'" end
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token = string.gsub(token, "(%p)", "%%%1")
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local pt = string.format([[^%%[string ".*"%%]:%d: .- near %s$]],
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line, token)
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assert(string.find(msg, pt))
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assert(string.find(msg, msg, 1, true))
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end
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-- test error message with no extra info
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assert(doit("error('hi', 0)") == 'hi')
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-- test error message with no info
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assert(doit("error()") == nil)
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-- test common errors/errors that crashed in the past
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assert(doit("table.unpack({}, 1, n=2^30)"))
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assert(doit("a=math.sin()"))
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assert(not doit("tostring(1)") and doit("tostring()"))
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assert(doit"tonumber()")
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assert(doit"repeat until 1; a")
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assert(doit"return;;")
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assert(doit"assert(false)")
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assert(doit"assert(nil)")
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assert(doit("function a (... , ...) end"))
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assert(doit("function a (, ...) end"))
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assert(doit("local t={}; t = t[#t] + 1"))
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checksyntax([[
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local a = {4
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]], "'}' expected (to close '{' at line 1)", "<eof>", 3)
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-- tests for better error messages
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checkmessage("a = {} + 1", "arithmetic")
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checkmessage("a = {} | 1", "bitwise operation")
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checkmessage("a = {} < 1", "attempt to compare")
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checkmessage("a = {} <= 1", "attempt to compare")
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checkmessage("a=1; bbbb=2; a=math.sin(3)+bbbb(3)", "global 'bbbb'")
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checkmessage("a={}; do local a=1 end a:bbbb(3)", "method 'bbbb'")
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checkmessage("local a={}; a.bbbb(3)", "field 'bbbb'")
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assert(not string.find(doit"a={13}; local bbbb=1; a[bbbb](3)", "'bbbb'"))
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checkmessage("a={13}; local bbbb=1; a[bbbb](3)", "number")
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checkmessage("a=(1)..{}", "a table value")
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checkmessage("a = #print", "length of a function value")
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checkmessage("a = #3", "length of a number value")
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aaa = nil
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checkmessage("aaa.bbb:ddd(9)", "global 'aaa'")
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checkmessage("local aaa={bbb=1}; aaa.bbb:ddd(9)", "field 'bbb'")
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checkmessage("local aaa={bbb={}}; aaa.bbb:ddd(9)", "method 'ddd'")
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checkmessage("local a,b,c; (function () a = b+1 end)()", "upvalue 'b'")
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assert(not doit"local aaa={bbb={ddd=next}}; aaa.bbb:ddd(nil)")
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-- upvalues being indexed do not go to the stack
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checkmessage("local a,b,cc; (function () a = cc[1] end)()", "upvalue 'cc'")
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checkmessage("local a,b,cc; (function () a.x = 1 end)()", "upvalue 'a'")
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checkmessage("local _ENV = {x={}}; a = a + 1", "global 'a'")
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checkmessage("b=1; local aaa='a'; x=aaa+b", "local 'aaa'")
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checkmessage("aaa={}; x=3/aaa", "global 'aaa'")
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checkmessage("aaa='2'; b=nil;x=aaa*b", "global 'b'")
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checkmessage("aaa={}; x=-aaa", "global 'aaa'")
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-- short circuit
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checkmessage("a=1; local a,bbbb=2,3; a = math.sin(1) and bbbb(3)",
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"local 'bbbb'")
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checkmessage("a=1; local a,bbbb=2,3; a = bbbb(1) or a(3)", "local 'bbbb'")
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checkmessage("local a,b,c,f = 1,1,1; f((a and b) or c)", "local 'f'")
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checkmessage("local a,b,c = 1,1,1; ((a and b) or c)()", "call a number value")
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assert(not string.find(doit"aaa={}; x=(aaa or aaa)+(aaa and aaa)", "'aaa'"))
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assert(not string.find(doit"aaa={}; (aaa or aaa)()", "'aaa'"))
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checkmessage("print(print < 10)", "function with number")
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checkmessage("print(print < print)", "two function values")
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checkmessage("print('10' < 10)", "string with number")
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checkmessage("print(10 < '23')", "number with string")
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-- float->integer conversions
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checkmessage("local a = 2.0^100; x = a << 2", "local a")
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checkmessage("local a = 1 >> 2.0^100", "has no integer representation")
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checkmessage("local a = '10' << 2.0^100", "has no integer representation")
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checkmessage("local a = 2.0^100 & 1", "has no integer representation")
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checkmessage("local a = 2.0^100 & '1'", "has no integer representation")
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checkmessage("local a = 2.0 | 1e40", "has no integer representation")
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checkmessage("local a = 2e100 ~ 1", "has no integer representation")
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checkmessage("string.sub('a', 2.0^100)", "has no integer representation")
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checkmessage("string.rep('a', 3.3)", "has no integer representation")
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checkmessage("return 6e40 & 7", "has no integer representation")
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checkmessage("return 34 << 7e30", "has no integer representation")
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checkmessage("return ~-3e40", "has no integer representation")
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checkmessage("return ~-3.009", "has no integer representation")
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checkmessage("return 3.009 & 1", "has no integer representation")
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checkmessage("return 34 >> {}", "table value")
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checkmessage("a = 24 // 0", "divide by zero")
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checkmessage("a = 1 % 0", "'n%0'")
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-- passing light userdata instead of full userdata
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_G.D = debug
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checkmessage([[
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-- create light udata
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local x = D.upvalueid(function () return debug end, 1)
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D.setuservalue(x, {})
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]], "light userdata")
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_G.D = nil
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do -- named objects (field '__name')
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checkmessage("math.sin(io.input())", "(number expected, got FILE*)")
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_G.XX = setmetatable({}, {__name = "My Type"})
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assert(string.find(tostring(XX), "^My Type"))
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checkmessage("io.input(XX)", "(FILE* expected, got My Type)")
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checkmessage("return XX + 1", "on a My Type value")
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checkmessage("return ~io.stdin", "on a FILE* value")
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checkmessage("return XX < XX", "two My Type values")
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checkmessage("return {} < XX", "table with My Type")
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checkmessage("return XX < io.stdin", "My Type with FILE*")
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_G.XX = nil
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end
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-- global functions
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checkmessage("(io.write or print){}", "io.write")
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checkmessage("(collectgarbage or print){}", "collectgarbage")
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-- errors in functions without debug info
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do
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local f = function (a) return a + 1 end
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f = assert(load(string.dump(f, true)))
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assert(f(3) == 4)
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print (pcall(f, {}))
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checkerr(":%-1:", f, {}) -- NodeMCU known issue with retaining source info
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-- code with a move to a local var ('OP_MOV A B' with A<B)
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f = function () local a; a = {}; return a + 2 end
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-- no debug info (so that 'a' is unknown)
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f = assert(load(string.dump(f, true)))
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-- symbolic execution should not get lost
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checkerr(":%-1:.*table value", f) -- NodeMCU known issue with retaining source info
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end
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-- tests for field accesses after RK limit
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local t = {}
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for i = 1, 1000 do
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t[i] = "a = x" .. i
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end
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local s = table.concat(t, "; ")
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t = nil
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checkmessage(s.."; a = bbb + 1", "global 'bbb'")
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checkmessage("local _ENV=_ENV;"..s.."; a = bbb + 1", "global 'bbb'")
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checkmessage(s.."; local t = {}; a = t.bbb + 1", "field 'bbb'")
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checkmessage(s.."; local t = {}; t:bbb()", "method 'bbb'")
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checkmessage([[aaa=9
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repeat until 3==3
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local x=math.sin(math.cos(3))
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if math.sin(1) == x then return math.sin(1) end -- tail call
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local a,b = 1, {
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{x='a'..'b'..'c', y='b', z=x},
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{1,2,3,4,5} or 3+3<=3+3,
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3+1>3+1,
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{d = x and aaa[x or y]}}
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]], "global 'aaa'")
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checkmessage([[
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local x,y = {},1
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if math.sin(1) == 0 then return 3 end -- return
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x.a()]], "field 'a'")
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checkmessage([[
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prefix = nil
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insert = nil
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while 1 do
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local a
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if nil then break end
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insert(prefix, a)
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end]], "global 'insert'")
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checkmessage([[ -- tail call
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return math.sin("a")
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]], "'sin'")
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checkmessage([[collectgarbage("nooption")]], "invalid option")
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checkmessage([[x = print .. "a"]], "concatenate")
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checkmessage([[x = "a" .. false]], "concatenate")
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checkmessage([[x = {} .. 2]], "concatenate")
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checkmessage("getmetatable(io.stdin).__gc()", "no value")
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checkmessage([[
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local Var
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local function main()
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NoSuchName (function() Var=0 end)
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end
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main()
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]], "global 'NoSuchName'")
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print'+'
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a = {}; setmetatable(a, {__index = string})
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checkmessage("a:sub()", "bad self")
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checkmessage("string.sub('a', {})", "#2")
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checkmessage("('a'):sub{}", "#1")
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checkmessage("table.sort({1,2,3}, table.sort)", "'table.sort'")
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checkmessage("string.gsub('s', 's', setmetatable)", "'setmetatable'")
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-- tests for errors in coroutines
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local function f (n)
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local c = coroutine.create(f)
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local a,b = coroutine.resume(c)
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return b
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end
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assert(string.find(f(), "C stack overflow"))
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checkmessage("coroutine.yield()", "outside a coroutine")
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f = coroutine.wrap(function () table.sort({1,2,3}, coroutine.yield) end)
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checkerr("yield across", f)
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-- testing size of 'source' info; size of buffer for that info is
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-- LUA_IDSIZE, declared as 60 in luaconf. Get one position for '\0'.
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idsize = 60 - 1
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local function checksize (source)
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-- syntax error
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local _, msg = load("x", source)
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msg = string.match(msg, "^([^:]*):") -- get source (1st part before ':')
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assert(msg:len() <= idsize)
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end
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for i = 60 - 10, 60 + 10 do -- check border cases around 60
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checksize("@" .. string.rep("x", i)) -- file names
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checksize(string.rep("x", i - 10)) -- string sources
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checksize("=" .. string.rep("x", i)) -- exact sources
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end
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-- testing line error
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local function lineerror (s, l)
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local err,msg = pcall(load(s))
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local line = string.match(msg, ":(%d+):")
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assert((line and line+0) == l)
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end
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lineerror("local a\n for i=1,'a' do \n print(i) \n end", 2)
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lineerror("\n local a \n for k,v in 3 \n do \n print(k) \n end", 3)
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lineerror("\n\n for k,v in \n 3 \n do \n print(k) \n end", 4)
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lineerror("function a.x.y ()\na=a+1\nend", 1)
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lineerror("a = \na\n+\n{}", 3)
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lineerror("a = \n3\n+\n(\n4\n/\nprint)", 6)
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lineerror("a = \nprint\n+\n(\n4\n/\n7)", 3)
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lineerror("a\n=\n-\n\nprint\n;", 3)
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lineerror([[
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a
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(
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23)
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]], 1)
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lineerror([[
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local a = {x = 13}
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a
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.
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x
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(
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23
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)
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]], 2)
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lineerror([[
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local a = {x = 13}
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a
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.
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x
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(
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23 + a
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)
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]], 6)
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local p = [[
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function g() f() end
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function f(x) error('a', X) end
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g()
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]]
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X=3;lineerror((p), 3)
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X=0;lineerror((p), nil)
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X=1;lineerror((p), 2)
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X=2;lineerror((p), 1)
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if not _soft then
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-- several tests that exaust the Lua stack
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collectgarbage()
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print"testing stack overflow"
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C = 0
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local l = debug.getinfo(1, "l").currentline; function y () C=C+1; y() end
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local function checkstackmessage (m)
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return (string.find(m, "^.-:%d+: stack overflow"))
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end
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-- repeated stack overflows (to check stack recovery)
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assert(checkstackmessage(doit('y()')))
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print('+')
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assert(checkstackmessage(doit('y()')))
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print('+')
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assert(checkstackmessage(doit('y()')))
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print('+')
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-- error lines in stack overflow
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C = 0
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local l1
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local function g(x)
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l1 = debug.getinfo(x, "l").currentline; y()
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end
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local _, stackmsg = xpcall(g, debug.traceback, 1)
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print('+')
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local stack = {}
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for line in string.gmatch(stackmsg, "[^\n]*") do
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local curr = string.match(line, ":(%d+):")
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if curr then table.insert(stack, tonumber(curr)) end
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end
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local i=1
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while stack[i] ~= l1 do
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assert(stack[i] == l)
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i = i+1
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end
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assert(i > 15)
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-- error in error handling
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local res, msg = xpcall(error, error)
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assert(not res and type(msg) == 'string')
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print('+')
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local function f (x)
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if x==0 then error('a\n')
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else
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local aux = function () return f(x-1) end
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local a,b = xpcall(aux, aux)
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return a,b
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end
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end
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f(3)
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local function loop (x,y,z) return 1 + loop(x, y, z) end
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local res, msg = xpcall(loop, function (m)
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assert(string.find(m, "stack overflow"))
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checkerr("error handling", loop)
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assert(math.sin(0) == 0)
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return 15
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end)
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assert(msg == 15)
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local f = function ()
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for i = 999900, 1000000, 1 do table.unpack({}, 1, i) end
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end
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checkerr("too many results", f)
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end
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do
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-- non string messages
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local t = {}
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local res, msg = pcall(function () error(t) end)
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assert(not res and msg == t)
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res, msg = pcall(function () error(nil) end)
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assert(not res and msg == nil)
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local function f() error{msg='x'} end
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res, msg = xpcall(f, function (r) return {msg=r.msg..'y'} end)
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assert(msg.msg == 'xy')
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-- 'assert' with extra arguments
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res, msg = pcall(assert, false, "X", t)
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assert(not res and msg == "X")
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-- 'assert' with no message
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res, msg = pcall(function () assert(false) end)
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local line = string.match(msg, "%w+%.lua:(%d+): assertion failed!$")
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assert(tonumber(line) == debug.getinfo(1, "l").currentline - 2)
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-- 'assert' with non-string messages
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res, msg = pcall(assert, false, t)
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assert(not res and msg == t)
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res, msg = pcall(assert, nil, nil)
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assert(not res and msg == nil)
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-- 'assert' without arguments
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res, msg = pcall(assert)
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assert(not res and string.find(msg, "value expected"))
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end
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-- xpcall with arguments
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a, b, c = xpcall(string.find, error, "alo", "al")
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assert(a and b == 1 and c == 2)
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a, b, c = xpcall(string.find, function (x) return {} end, true, "al")
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assert(not a and type(b) == "table" and c == nil)
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print("testing tokens in error messages")
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checksyntax("syntax error", "", "error", 1)
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checksyntax("1.000", "", "1.000", 1)
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checksyntax("[[a]]", "", "[[a]]", 1)
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checksyntax("'aa'", "", "'aa'", 1)
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checksyntax("while << do end", "", "<<", 1)
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checksyntax("for >> do end", "", ">>", 1)
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-- test invalid non-printable char in a chunk
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checksyntax("a\1a = 1", "", "<\\1>", 1)
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-- test 255 as first char in a chunk
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checksyntax("\255a = 1", "", "<\\255>", 1)
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doit('I = load("a=9+"); a=3')
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assert(a==3 and I == nil)
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print('+')
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lim = 1000
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if _soft then lim = 100 end
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for i=1,lim do
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doit('a = ')
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doit('a = 4+nil')
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end
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-- testing syntax limits
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local maxClevel = 200 -- LUAI_MAXCCALLS (in llimits.h)
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local function testrep (init, rep, close, repc)
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local s = init .. string.rep(rep, maxClevel - 10) .. close ..
|
|
string.rep(repc, maxClevel - 10)
|
|
assert(load(s)) -- 190 levels is OK
|
|
s = init .. string.rep(rep, maxClevel + 1)
|
|
checkmessage(s, "too many C levels")
|
|
end
|
|
|
|
testrep("local a; a", ",a", "= 1", ",1") -- multiple assignment
|
|
testrep("local a; a=", "{", "0", "}")
|
|
testrep("local a; a=", "(", "2", ")")
|
|
testrep("local a; ", "a(", "2", ")")
|
|
testrep("", "do ", "", " end")
|
|
testrep("", "while a do ", "", " end")
|
|
testrep("local a; ", "if a then else ", "", " end")
|
|
testrep("", "function foo () ", "", " end")
|
|
testrep("local a; a=", "a..", "a", "")
|
|
testrep("local a; a=", "a^", "a", "")
|
|
|
|
checkmessage("a = f(x" .. string.rep(",x", 260) .. ")", "too many registers")
|
|
|
|
|
|
-- testing other limits
|
|
|
|
-- upvalues
|
|
local lim = 127
|
|
local s = "local function fooA ()\n local "
|
|
for j = 1,lim do
|
|
s = s.."a"..j..", "
|
|
end
|
|
s = s.."b,c\n"
|
|
s = s.."local function fooB ()\n local "
|
|
for j = 1,lim do
|
|
s = s.."b"..j..", "
|
|
end
|
|
s = s.."b\n"
|
|
s = s.."function fooC () return b+c"
|
|
local c = 1+2
|
|
for j = 1,lim do
|
|
s = s.."+a"..j.."+b"..j
|
|
c = c + 2
|
|
end
|
|
s = s.."\nend end end"
|
|
local a,b = load(s)
|
|
assert(c > 255 and string.find(b, "too many upvalues") and
|
|
string.find(b, "line 5"))
|
|
|
|
-- local variables
|
|
s = "\nfunction foo ()\n local "
|
|
for j = 1,300 do
|
|
s = s.."a"..j..", "
|
|
end
|
|
s = s.."b\n"
|
|
local a,b = load(s)
|
|
assert(string.find(b, "line 2") and string.find(b, "too many local variables"))
|
|
|
|
print('OK')
|