bug#62216: Odd file corruption in clojure mode and emacs 30 HEAD

[Gerd Möllmann]

Po Lu <luangruo@yahoo.com> writes:

> Jonathon McKitrick <jcm@SDF.ORG> writes:
>
>> What's the best mechanism to log these values in emacs?
>
> In this case, printf.

When I add this assumption:

modified   src/fileio.c
@@ -4805,8 +4805,11 @@ DEFUN ("insert-file-contents", Finsert_file_contents, 
Sinsert_file_contents,
 
        /* 'try' is reserved in some compilers (Microsoft C).  */
        ptrdiff_t trytry = min (gap_size, READ_BUF_SIZE);
+       ptrdiff_t trytry_old = min (total - inserted, READ_BUF_SIZE);
        if (!NILP (end))
          trytry = min (trytry, total - inserted);
+       if (trytry != trytry_old)
+         abort ();
 
        if (!seekable && NILP (end))
          {

and make bootstrap, temacs aborts.

Can someone tell if this assumption should hold?