Re: [Emacs-diffs] master b01a429: js--re-search-backward-inner: Fix infloop

[Dmitry Gutov <dgutov@yandex.ru>]

Hi Eli,

Any chance I may backport this to emacs-26?

The bug was reported only recently, but it seems pretty annoying 
(infloop during indentation), and the fix is simple.

On 01.02.2019 03:02, Dmitry Gutov wrote:
> branch: master
> commit b01a4295c2f9bb58858880e4e28b05cc8396791c
> Author: Dmitry Gutov <dgutov@yandex.ru>
> Commit: Dmitry Gutov <dgutov@yandex.ru>
> 
>      js--re-search-backward-inner: Fix infloop
>      
>      Fix JS indentation infloop reported in
>      https://github.com/mooz/js2-mode/issues/513.
>      
>      * lisp/progmodes/js.el (js--re-search-backward-inner): Account for
>      multiline string literals.
>      * test/manual/indent/js.js: New test example.
> ---
>   lisp/progmodes/js.el     | 9 +--------
>   test/manual/indent/js.js | 7 +++++++
>   2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
> index e55539c..a94a2fe 100644
> --- a/lisp/progmodes/js.el
> +++ b/lisp/progmodes/js.el
> @@ -785,7 +785,6 @@ macro as normal text."
>   (defun js--re-search-backward-inner (regexp &optional bound count)
>     "Auxiliary function for `js--re-search-backward'."
>     (let ((parse)
> -        str-terminator
>           (orig-macro-start
>            (save-excursion
>              (and (js--beginning-of-macro)
> @@ -796,13 +795,7 @@ macro as normal text."
>                    (save-excursion (backward-char) (looking-at "/[/*]")))
>           (forward-char))
>         (setq parse (syntax-ppss))
> -      (cond ((setq str-terminator (nth 3 parse))
> -             (when (eq str-terminator t)
> -               (setq str-terminator ?/))
> -             (re-search-backward
> -              (concat "\\([^\\]\\|^\\)" (string str-terminator))
> -              (point-at-bol) t))
> -            ((nth 7 parse)
> +      (cond ((nth 8 parse)
>                (goto-char (nth 8 parse)))
>               ((or (nth 4 parse)
>                    (and (eq (char-before) ?/) (eq (char-after) ?*)))
> diff --git a/test/manual/indent/js.js b/test/manual/indent/js.js
> index b0d8bca..df79098 100644
> --- a/test/manual/indent/js.js
> +++ b/test/manual/indent/js.js
> @@ -144,6 +144,13 @@ bar(
>     /abc/
>   )
>   
> +// No infloop inside js--re-search-backward-inner
> +let b = {
> +  a : `
> +  //1
> +  `
> +}
> +
>   // Local Variables:
>   // indent-tabs-mode: nil
>   // js-indent-level: 2
> 
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