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Fix for crashing and assertion failures when tab completing a token that consists of only backslash

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Fixes https://github.com/fish-shell/fish-shell/issues/762
This commit is contained in:
ridiculousfish 2013-05-20 01:40:24 -07:00
parent f8786c25be
commit 924b646b79
1 changed files with 10 additions and 8 deletions
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18
reader.cpp
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@ -3043,17 +3043,25 @@ const wchar_t *reader_readline(void)
else
{
/* Either the user hit tab only once, or we had no visible completion list. */
const wchar_t *cmdsub_begin, *cmdsub_end;
const wchar_t *token_begin, *token_end;
/* Remove a trailing backslash. This may trigger an extra repaint, but this is rare. */
if (is_backslashed(data->command_line, data->buff_pos))
{
remove_backward();
}
/* Get the string; we have to do this after removing any trailing backslash */
const wchar_t * const buff = data->command_line.c_str();
/* Clear the completion list */
comp.clear();
/* Figure out the extent of the command substitution surrounding the cursor. This is because we only look at the current command substitution to form completions - stuff happening outside of it is not interesting. */
const wchar_t *cmdsub_begin, *cmdsub_end;
parse_util_cmdsubst_extent(buff, data->buff_pos, &cmdsub_begin, &cmdsub_end);
/* Figure out the extent of the token within the command substitution. Note we pass cmdsub_begin here, not buff */
const wchar_t *token_begin, *token_end;
parse_util_token_extent(cmdsub_begin, data->buff_pos - (cmdsub_begin-buff), &token_begin, &token_end, 0, 0);
/* Figure out how many steps to get from the current position to the end of the current token. */
@ -3066,12 +3074,6 @@ const wchar_t *reader_readline(void)
reader_repaint();
}
/* Remove a trailing backslash. This may trigger an extra repaint, but this is rare. */
if (is_backslashed(data->command_line, data->buff_pos))
{
remove_backward();
}
/* Construct a copy of the string from the beginning of the command substitution up to the end of the token we're completing */
const wcstring buffcpy = wcstring(cmdsub_begin, token_end);