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patch 8.2.3029: Vim9: crash when using operator and list unpack assignment

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Problem:    Vim9: crash when using operator and list unpack assignment.
            (Naohiro Ono)
Solution:   Get variable value before operation. (closes #8416)
This commit is contained in:
Bram Moolenaar
2021-06-21 19:44:11 +02:00
parent f1e7449d56
commit 035bd1c99f
7 changed files with 96 additions and 20 deletions
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14
src/vim9execute.c
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@@ -3832,12 +3832,12 @@ exec_instructions(ectx_T *ectx)
case ISN_GETITEM:
{
listitem_T *li;
int index = iptr->isn_arg.number;
getitem_T *gi = &iptr->isn_arg.getitem;
// Get list item: list is at stack-1, push item.
// List type and length is checked for when compiling.
tv = STACK_TV_BOT(-1);
li = list_find(tv->vval.v_list, index);
tv = STACK_TV_BOT(-1 - gi->gi_with_op);
li = list_find(tv->vval.v_list, gi->gi_index);
if (GA_GROW(&ectx->ec_stack, 1) == FAIL)
goto theend;
@@ -3846,7 +3846,7 @@ exec_instructions(ectx_T *ectx)
// Useful when used in unpack assignment. Reset at
// ISN_DROP.
ectx->ec_where.wt_index = index + 1;
ectx->ec_where.wt_index = gi->gi_index + 1;
ectx->ec_where.wt_variable = TRUE;
}
break;
@@ -5376,8 +5376,10 @@ list_instructions(char *pfx, isn_T *instr, int instr_count, ufunc_T *ufunc)
case ISN_ANYSLICE: smsg("%s%4d ANYSLICE", pfx, current); break;
case ISN_SLICE: smsg("%s%4d SLICE %lld",
pfx, current, iptr->isn_arg.number); break;
case ISN_GETITEM: smsg("%s%4d ITEM %lld",
pfx, current, iptr->isn_arg.number); break;
case ISN_GETITEM: smsg("%s%4d ITEM %lld%s", pfx, current,
iptr->isn_arg.getitem.gi_index,
iptr->isn_arg.getitem.gi_with_op ?
" with op" : ""); break;
case ISN_MEMBER: smsg("%s%4d MEMBER", pfx, current); break;
case ISN_STRINGMEMBER: smsg("%s%4d MEMBER %s", pfx, current,
iptr->isn_arg.string); break;