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fix(prompt): prompt_setprompt with unloaded buffer, ': with lnum 0

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Problem: prompt_setprompt memory leak/other issues when fixing prompt line for
unloaded buffer, or when ': line number is zero.

Solution: don't fix prompt line for unloaded buffer. Clamp ': lnum above zero.
This commit is contained in:
Sean Dewar
2026-02-16 22:09:14 +00:00
parent 13cf80deef
commit 16bf7652b7
3 changed files with 19 additions and 5 deletions
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4
src/nvim/edit.c
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@@ -1594,8 +1594,8 @@ static void init_prompt(int cmdchar_todo)
int prompt_len = (int)strlen(prompt);
// In case the mark is set to a nonexistent line.
curbuf->b_prompt_start.mark.lnum = MIN(curbuf->b_prompt_start.mark.lnum,
curbuf->b_ml.ml_line_count);
curbuf->b_prompt_start.mark.lnum = MAX(1, MIN(curbuf->b_prompt_start.mark.lnum,
curbuf->b_ml.ml_line_count));
curwin->w_cursor.lnum = MAX(curwin->w_cursor.lnum, curbuf->b_prompt_start.mark.lnum);
char *text = ml_get(curbuf->b_prompt_start.mark.lnum);