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Bug: Lua can generate wrong code when _ENV is <const>

This commit is contained in:
Roberto Ierusalimschy 2022-02-15 12:28:46 -03:00
parent 25b143dd34
commit 1f3c6f4534
2 changed files with 11 additions and 0 deletions
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1
lparser.c
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@ -468,6 +468,7 @@ static void singlevar (LexState *ls, expdesc *var) {
expdesc key; expdesc key;
singlevaraux(fs, ls->envn, var, 1); /* get environment variable */ singlevaraux(fs, ls->envn, var, 1); /* get environment variable */
lua_assert(var->k != VVOID); /* this one must exist */ lua_assert(var->k != VVOID); /* this one must exist */
luaK_exp2anyregup(fs, var); /* but could be a constant */
codestring(&key, varname); /* key is variable name */ codestring(&key, varname); /* key is variable name */
luaK_indexed(fs, var, &key); /* env[varname] */ luaK_indexed(fs, var, &key); /* env[varname] */
} }

10
testes/attrib.lua
View File

@ -434,6 +434,16 @@ a.aVeryLongName012345678901234567890123456789012345678901234567890123456789 ==
10) 10)
do
-- _ENV constant
local function foo ()
local _ENV <const> = 11
X = "hi"
end
local st, msg = pcall(foo)
assert(not st and string.find(msg, "number"))
end
-- test of large float/integer indices -- test of large float/integer indices