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text: avoid a crash when a spell-checked line has gotten shorter

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When using an external spell checker or formatter, the line with
the cursor might become shorter, which might result in the stored
cursor position being beyond the end-of-line.  So, when restoring
the x position, make sure to limit it to the length of the line.

This fixes https://savannah.gnu.org/bugs/?49923.
This commit is contained in:
Benno Schulenberg 2016-12-24 12:09:47 +01:00
parent dc18746cbd
commit edbc1e5950
1 changed files with 5 additions and 1 deletions
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6
src/text.c
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@ -3073,6 +3073,8 @@ const char *do_alt_speller(char *tempfile_name)
/* Go back to the old position. */
goto_line_posx(lineno_save, current_x_save);
if (openfile->current_x > strlen(openfile->current->data))
openfile->current_x = strlen(openfile->current->data);
openfile->current_y = current_y_save;
openfile->placewewant = pww_save;
adjust_viewport(STATIONARY);
@ -3545,8 +3547,10 @@ void do_formatter(void)
/* Replace the text of the current buffer with the formatted text. */
replace_buffer(temp);
/* Restore the cursor position, and mark the file as modified. */
/* Restore the cursor position. */
goto_line_posx(lineno_save, current_x_save);
if (openfile->current_x > strlen(openfile->current->data))
openfile->current_x = strlen(openfile->current->data);
openfile->current_y = current_y_save;
openfile->placewewant = pww_save;
adjust_viewport(STATIONARY);