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patch 8.2.3998: asan error for adding zero to NULL

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Problem:    Asan error for adding zero to NULL.
Solution:   Do not compute pointer if there are no entries.
This commit is contained in:
Bram Moolenaar
2022-01-04 16:05:48 +00:00
parent 10d6f18b2f
commit 48824e952f
2 changed files with 4 additions and 1 deletions
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3
src/vim9type.c
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@@ -1267,7 +1267,7 @@ get_member_type_from_stack(
cctx_T *cctx)
{
garray_T *stack = &cctx->ctx_type_stack;
type2_T *typep = ((type2_T *)stack->ga_data) + stack->ga_len;
type2_T *typep;
garray_T *type_gap = cctx->ctx_type_list;
int i;
type_T *result;
@@ -1283,6 +1283,7 @@ get_member_type_from_stack(
// Use the first value type for the list member type, then find the common
// type from following items.
typep = ((type2_T *)stack->ga_data) + stack->ga_len;
result = (typep -(count * skip) + skip - 1)->type_curr;
decl_result = (typep -(count * skip) + skip - 1)->type_decl;
for (i = 1; i < count; ++i)