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patch 8.2.3756: might crash when callback is not valid

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Problem:    might crash when callback is not valid.
Solution:   Check for valid callback. (Yegappan Lakshmanan, closes #9293)
This commit is contained in:
Yegappan Lakshmanan
2021-12-07 12:23:57 +00:00
committed by Bram Moolenaar
parent 92c33eb273
commit 4dc24eb5ad
9 changed files with 59 additions and 8 deletions
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3
src/tag.c
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@@ -1361,7 +1361,8 @@ find_tagfunc_tags(
dict_T *d;
taggy_T *tag = &curwin->w_tagstack[curwin->w_tagstackidx];
if (*curbuf->b_p_tfu == NUL)
if (*curbuf->b_p_tfu == NUL || curbuf->b_tfu_cb.cb_name == NULL
|| *curbuf->b_tfu_cb.cb_name == NUL)
return FAIL;
args[0].v_type = VAR_STRING;