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Diffstat (limited to 'testes/errors.lua')
| -rw-r--r-- | testes/errors.lua | 537 |
1 files changed, 537 insertions, 0 deletions
diff --git a/testes/errors.lua b/testes/errors.lua new file mode 100644 index 00000000..79d746c7 --- /dev/null +++ b/testes/errors.lua @@ -0,0 +1,537 @@ +-- $Id: errors.lua,v 1.94 2016/12/21 19:23:02 roberto Exp $ +-- See Copyright Notice in file all.lua + +print("testing errors") + +local debug = require"debug" + +-- avoid problems with 'strict' module (which may generate other error messages) +local mt = getmetatable(_G) or {} +local oldmm = mt.__index +mt.__index = nil + +local function checkerr (msg, f, ...) + local st, err = pcall(f, ...) + assert(not st and string.find(err, msg)) +end + + +local function doit (s) + local f, msg = load(s) + if f == nil then return msg end + local cond, msg = pcall(f) + return (not cond) and msg +end + + +local function checkmessage (prog, msg) + local m = doit(prog) + assert(string.find(m, msg, 1, true)) +end + +local function checksyntax (prog, extra, token, line) + local msg = doit(prog) + if not string.find(token, "^<%a") and not string.find(token, "^char%(") + then token = "'"..token.."'" end + token = string.gsub(token, "(%p)", "%%%1") + local pt = string.format([[^%%[string ".*"%%]:%d: .- near %s$]], + line, token) + assert(string.find(msg, pt)) + assert(string.find(msg, msg, 1, true)) +end + + +-- test error message with no extra info +assert(doit("error('hi', 0)") == 'hi') + +-- test error message with no info +assert(doit("error()") == nil) + + +-- test common errors/errors that crashed in the past +assert(doit("table.unpack({}, 1, n=2^30)")) +assert(doit("a=math.sin()")) +assert(not doit("tostring(1)") and doit("tostring()")) +assert(doit"tonumber()") +assert(doit"repeat until 1; a") +assert(doit"return;;") +assert(doit"assert(false)") +assert(doit"assert(nil)") +assert(doit("function a (... , ...) end")) +assert(doit("function a (, ...) end")) +assert(doit("local t={}; t = t[#t] + 1")) + +checksyntax([[ + local a = {4 + +]], "'}' expected (to close '{' at line 1)", "<eof>", 3) + + +-- tests for better error messages + +checkmessage("a = {} + 1", "arithmetic") +checkmessage("a = {} | 1", "bitwise operation") +checkmessage("a = {} < 1", "attempt to compare") +checkmessage("a = {} <= 1", "attempt to compare") + +checkmessage("a=1; bbbb=2; a=math.sin(3)+bbbb(3)", "global 'bbbb'") +checkmessage("a={}; do local a=1 end a:bbbb(3)", "method 'bbbb'") +checkmessage("local a={}; a.bbbb(3)", "field 'bbbb'") +assert(not string.find(doit"a={13}; local bbbb=1; a[bbbb](3)", "'bbbb'")) +checkmessage("a={13}; local bbbb=1; a[bbbb](3)", "number") +checkmessage("a=(1)..{}", "a table value") + +checkmessage("a = #print", "length of a function value") +checkmessage("a = #3", "length of a number value") + +aaa = nil +checkmessage("aaa.bbb:ddd(9)", "global 'aaa'") +checkmessage("local aaa={bbb=1}; aaa.bbb:ddd(9)", "field 'bbb'") +checkmessage("local aaa={bbb={}}; aaa.bbb:ddd(9)", "method 'ddd'") +checkmessage("local a,b,c; (function () a = b+1 end)()", "upvalue 'b'") +assert(not doit"local aaa={bbb={ddd=next}}; aaa.bbb:ddd(nil)") + +-- upvalues being indexed do not go to the stack +checkmessage("local a,b,cc; (function () a = cc[1] end)()", "upvalue 'cc'") +checkmessage("local a,b,cc; (function () a.x = 1 end)()", "upvalue 'a'") + +checkmessage("local _ENV = {x={}}; a = a + 1", "global 'a'") + +checkmessage("b=1; local aaa='a'; x=aaa+b", "local 'aaa'") +checkmessage("aaa={}; x=3/aaa", "global 'aaa'") +checkmessage("aaa='2'; b=nil;x=aaa*b", "global 'b'") +checkmessage("aaa={}; x=-aaa", "global 'aaa'") + +-- short circuit +checkmessage("a=1; local a,bbbb=2,3; a = math.sin(1) and bbbb(3)", + "local 'bbbb'") +checkmessage("a=1; local a,bbbb=2,3; a = bbbb(1) or a(3)", "local 'bbbb'") +checkmessage("local a,b,c,f = 1,1,1; f((a and b) or c)", "local 'f'") +checkmessage("local a,b,c = 1,1,1; ((a and b) or c)()", "call a number value") +assert(not string.find(doit"aaa={}; x=(aaa or aaa)+(aaa and aaa)", "'aaa'")) +assert(not string.find(doit"aaa={}; (aaa or aaa)()", "'aaa'")) + +checkmessage("print(print < 10)", "function with number") +checkmessage("print(print < print)", "two function values") +checkmessage("print('10' < 10)", "string with number") +checkmessage("print(10 < '23')", "number with string") + +-- float->integer conversions +checkmessage("local a = 2.0^100; x = a << 2", "local a") +checkmessage("local a = 1 >> 2.0^100", "has no integer representation") +checkmessage("local a = '10' << 2.0^100", "has no integer representation") +checkmessage("local a = 2.0^100 & 1", "has no integer representation") +checkmessage("local a = 2.0^100 & '1'", "has no integer representation") +checkmessage("local a = 2.0 | 1e40", "has no integer representation") +checkmessage("local a = 2e100 ~ 1", "has no integer representation") +checkmessage("string.sub('a', 2.0^100)", "has no integer representation") +checkmessage("string.rep('a', 3.3)", "has no integer representation") +checkmessage("return 6e40 & 7", "has no integer representation") +checkmessage("return 34 << 7e30", "has no integer representation") +checkmessage("return ~-3e40", "has no integer representation") +checkmessage("return ~-3.009", "has no integer representation") +checkmessage("return 3.009 & 1", "has no integer representation") +checkmessage("return 34 >> {}", "table value") +checkmessage("a = 24 // 0", "divide by zero") +checkmessage("a = 1 % 0", "'n%0'") + + +-- passing light userdata instead of full userdata +_G.D = debug +checkmessage([[ + -- create light udata + local x = D.upvalueid(function () return debug end, 1) + D.setuservalue(x, {}) +]], "light userdata") +_G.D = nil + +do -- named objects (field '__name') + checkmessage("math.sin(io.input())", "(number expected, got FILE*)") + _G.XX = setmetatable({}, {__name = "My Type"}) + assert(string.find(tostring(XX), "^My Type")) + checkmessage("io.input(XX)", "(FILE* expected, got My Type)") + checkmessage("return XX + 1", "on a My Type value") + checkmessage("return ~io.stdin", "on a FILE* value") + checkmessage("return XX < XX", "two My Type values") + checkmessage("return {} < XX", "table with My Type") + checkmessage("return XX < io.stdin", "My Type with FILE*") + _G.XX = nil +end + +-- global functions +checkmessage("(io.write or print){}", "io.write") +checkmessage("(collectgarbage or print){}", "collectgarbage") + +-- errors in functions without debug info +do + local f = function (a) return a + 1 end + f = assert(load(string.dump(f, true))) + assert(f(3) == 4) + checkerr("^%?:%-1:", f, {}) + + -- code with a move to a local var ('OP_MOV A B' with A<B) + f = function () local a; a = {}; return a + 2 end + -- no debug info (so that 'a' is unknown) + f = assert(load(string.dump(f, true))) + -- symbolic execution should not get lost + checkerr("^%?:%-1:.*table value", f) +end + + +-- tests for field accesses after RK limit +local t = {} +for i = 1, 1000 do + t[i] = "a = x" .. i +end +local s = table.concat(t, "; ") +t = nil +checkmessage(s.."; a = bbb + 1", "global 'bbb'") +checkmessage("local _ENV=_ENV;"..s.."; a = bbb + 1", "global 'bbb'") +checkmessage(s.."; local t = {}; a = t.bbb + 1", "field 'bbb'") +checkmessage(s.."; local t = {}; t:bbb()", "method 'bbb'") + +checkmessage([[aaa=9 +repeat until 3==3 +local x=math.sin(math.cos(3)) +if math.sin(1) == x then return math.sin(1) end -- tail call +local a,b = 1, { + {x='a'..'b'..'c', y='b', z=x}, + {1,2,3,4,5} or 3+3<=3+3, + 3+1>3+1, + {d = x and aaa[x or y]}} +]], "global 'aaa'") + +checkmessage([[ +local x,y = {},1 +if math.sin(1) == 0 then return 3 end -- return +x.a()]], "field 'a'") + +checkmessage([[ +prefix = nil +insert = nil +while 1 do + local a + if nil then break end + insert(prefix, a) +end]], "global 'insert'") + +checkmessage([[ -- tail call + return math.sin("a") +]], "'sin'") + +checkmessage([[collectgarbage("nooption")]], "invalid option") + +checkmessage([[x = print .. "a"]], "concatenate") +checkmessage([[x = "a" .. false]], "concatenate") +checkmessage([[x = {} .. 2]], "concatenate") + +checkmessage("getmetatable(io.stdin).__gc()", "no value") + +checkmessage([[ +local Var +local function main() + NoSuchName (function() Var=0 end) +end +main() +]], "global 'NoSuchName'") +print'+' + +a = {}; setmetatable(a, {__index = string}) +checkmessage("a:sub()", "bad self") +checkmessage("string.sub('a', {})", "#2") +checkmessage("('a'):sub{}", "#1") + +checkmessage("table.sort({1,2,3}, table.sort)", "'table.sort'") +checkmessage("string.gsub('s', 's', setmetatable)", "'setmetatable'") + +-- tests for errors in coroutines + +local function f (n) + local c = coroutine.create(f) + local a,b = coroutine.resume(c) + return b +end +assert(string.find(f(), "C stack overflow")) + +checkmessage("coroutine.yield()", "outside a coroutine") + +f = coroutine.wrap(function () table.sort({1,2,3}, coroutine.yield) end) +checkerr("yield across", f) + + +-- testing size of 'source' info; size of buffer for that info is +-- LUA_IDSIZE, declared as 60 in luaconf. Get one position for '\0'. +idsize = 60 - 1 +local function checksize (source) + -- syntax error + local _, msg = load("x", source) + msg = string.match(msg, "^([^:]*):") -- get source (1st part before ':') + assert(msg:len() <= idsize) +end + +for i = 60 - 10, 60 + 10 do -- check border cases around 60 + checksize("@" .. string.rep("x", i)) -- file names + checksize(string.rep("x", i - 10)) -- string sources + checksize("=" .. string.rep("x", i)) -- exact sources +end + + +-- testing line error + +local function lineerror (s, l) + local err,msg = pcall(load(s)) + local line = string.match(msg, ":(%d+):") + assert((line and line+0) == l) +end + +lineerror("local a\n for i=1,'a' do \n print(i) \n end", 2) +lineerror("\n local a \n for k,v in 3 \n do \n print(k) \n end", 3) +lineerror("\n\n for k,v in \n 3 \n do \n print(k) \n end", 4) +lineerror("function a.x.y ()\na=a+1\nend", 1) + +lineerror("a = \na\n+\n{}", 3) +lineerror("a = \n3\n+\n(\n4\n/\nprint)", 6) +lineerror("a = \nprint\n+\n(\n4\n/\n7)", 3) + +lineerror("a\n=\n-\n\nprint\n;", 3) + +lineerror([[ +a +( +23) +]], 1) + +lineerror([[ +local a = {x = 13} +a +. +x +( +23 +) +]], 2) + +lineerror([[ +local a = {x = 13} +a +. +x +( +23 + a +) +]], 6) + +local p = [[ + function g() f() end + function f(x) error('a', X) end +g() +]] +X=3;lineerror((p), 3) +X=0;lineerror((p), nil) +X=1;lineerror((p), 2) +X=2;lineerror((p), 1) + + +if not _soft then + -- several tests that exaust the Lua stack + collectgarbage() + print"testing stack overflow" + C = 0 + local l = debug.getinfo(1, "l").currentline; function y () C=C+1; y() end + + local function checkstackmessage (m) + return (string.find(m, "^.-:%d+: stack overflow")) + end + -- repeated stack overflows (to check stack recovery) + assert(checkstackmessage(doit('y()'))) + print('+') + assert(checkstackmessage(doit('y()'))) + print('+') + assert(checkstackmessage(doit('y()'))) + print('+') + + + -- error lines in stack overflow + C = 0 + local l1 + local function g(x) + l1 = debug.getinfo(x, "l").currentline; y() + end + local _, stackmsg = xpcall(g, debug.traceback, 1) + print('+') + local stack = {} + for line in string.gmatch(stackmsg, "[^\n]*") do + local curr = string.match(line, ":(%d+):") + if curr then table.insert(stack, tonumber(curr)) end + end + local i=1 + while stack[i] ~= l1 do + assert(stack[i] == l) + i = i+1 + end + assert(i > 15) + + + -- error in error handling + local res, msg = xpcall(error, error) + assert(not res and type(msg) == 'string') + print('+') + + local function f (x) + if x==0 then error('a\n') + else + local aux = function () return f(x-1) end + local a,b = xpcall(aux, aux) + return a,b + end + end + f(3) + + local function loop (x,y,z) return 1 + loop(x, y, z) end + + local res, msg = xpcall(loop, function (m) + assert(string.find(m, "stack overflow")) + checkerr("error handling", loop) + assert(math.sin(0) == 0) + return 15 + end) + assert(msg == 15) + + local f = function () + for i = 999900, 1000000, 1 do table.unpack({}, 1, i) end + end + checkerr("too many results", f) + +end + + +do + -- non string messages + local t = {} + local res, msg = pcall(function () error(t) end) + assert(not res and msg == t) + + res, msg = pcall(function () error(nil) end) + assert(not res and msg == nil) + + local function f() error{msg='x'} end + res, msg = xpcall(f, function (r) return {msg=r.msg..'y'} end) + assert(msg.msg == 'xy') + + -- 'assert' with extra arguments + res, msg = pcall(assert, false, "X", t) + assert(not res and msg == "X") + + -- 'assert' with no message + res, msg = pcall(function () assert(false) end) + local line = string.match(msg, "%w+%.lua:(%d+): assertion failed!$") + assert(tonumber(line) == debug.getinfo(1, "l").currentline - 2) + + -- 'assert' with non-string messages + res, msg = pcall(assert, false, t) + assert(not res and msg == t) + + res, msg = pcall(assert, nil, nil) + assert(not res and msg == nil) + + -- 'assert' without arguments + res, msg = pcall(assert) + assert(not res and string.find(msg, "value expected")) +end + +-- xpcall with arguments +a, b, c = xpcall(string.find, error, "alo", "al") +assert(a and b == 1 and c == 2) +a, b, c = xpcall(string.find, function (x) return {} end, true, "al") +assert(not a and type(b) == "table" and c == nil) + + +print("testing tokens in error messages") +checksyntax("syntax error", "", "error", 1) +checksyntax("1.000", "", "1.000", 1) +checksyntax("[[a]]", "", "[[a]]", 1) +checksyntax("'aa'", "", "'aa'", 1) +checksyntax("while << do end", "", "<<", 1) +checksyntax("for >> do end", "", ">>", 1) + +-- test invalid non-printable char in a chunk +checksyntax("a\1a = 1", "", "<\\1>", 1) + +-- test 255 as first char in a chunk +checksyntax("\255a = 1", "", "<\\255>", 1) + +doit('I = load("a=9+"); a=3') +assert(a==3 and I == nil) +print('+') + +lim = 1000 +if _soft then lim = 100 end +for i=1,lim do + doit('a = ') + doit('a = 4+nil') +end + + +-- testing syntax limits + +local maxClevel = 200 -- LUAI_MAXCCALLS (in llimits.h) + +local function testrep (init, rep, close, repc) + 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")) + +mt.__index = oldmm + +print('OK') |