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[Backport release-0.7] fix seg fault in find_tagfunc_tags (#19503)

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fix: fix seg fault in find_tagfunc_tags

(cherry picked from commit 187c02cc40)

Co-authored-by: Frederick Mayle <fmayle@google.com>
This commit is contained in:
github-actions[bot]
2022-08-01 07:34:48 -07:00
committed by GitHub
parent 56834f4552
commit ce7df6759c
1 changed files with 10 additions and 2 deletions
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12
src/nvim/tag.c
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@ -1150,7 +1150,15 @@ static int find_tagfunc_tags(char_u *pat, garray_T *ga, int *match_count, int fl
typval_T args[4];
typval_T rettv;
char_u flagString[4];
taggy_T *tag = &curwin->w_tagstack[curwin->w_tagstackidx];
taggy_T *tag = NULL;
if (curwin->w_tagstacklen > 0) {
if (curwin->w_tagstackidx == curwin->w_tagstacklen) {
tag = &curwin->w_tagstack[curwin->w_tagstackidx - 1];
} else {
tag = &curwin->w_tagstack[curwin->w_tagstackidx];
}
}
if (*curbuf->b_p_tfu == NUL) {
return FAIL;
@ -1163,7 +1171,7 @@ static int find_tagfunc_tags(char_u *pat, garray_T *ga, int *match_count, int fl
// create 'info' dict argument
dict_T *const d = tv_dict_alloc_lock(VAR_FIXED);
if (tag->user_data != NULL) {
if (tag != NULL && tag->user_data != NULL) {
tv_dict_add_str(d, S_LEN("user_data"), (const char *)tag->user_data);
}
if (buf_ffname != NULL) {