nik/lush
1
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

To-be-closed variables must be closed on initialization

Browse Source 
When initializing a to-be-closed variable, check whether it has a
'__close' metamethod (or is a false value) and raise an error if
if it hasn't. This produces more accurate error messages. (The
check before closing still need to be done: in the C API, the value
is not constant; and the object may lose its '__close' metamethod
during the block.)
This commit is contained in:
Roberto Ierusalimschy
2019-07-31 10:43:51 -03:00
parent 35b4efc270
commit f645d31573
6 changed files with 70 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
lvm.c
View File

@@ -1739,10 +1739,8 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
vmbreak;
}
vmcase(OP_TFORPREP) {
if (!ttisnil(s2v(ra + 3))) { /* is 'toclose' not nil? */
/* create to-be-closed upvalue for it */
halfProtect(luaF_newtbcupval(L, ra + 3));
}
/* create to-be-closed upvalue (if needed) */
halfProtect(luaF_newtbcupval(L, ra + 3));
pc += GETARG_Bx(i);
i = *(pc++); /* go to next instruction */
lua_assert(GET_OPCODE(i) == OP_TFORCALL && ra == RA(i));