https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90034
--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(gdb) call fileno(c->fp)
$3 = 4
(gdb) info inferior
Num Description Executable
* 1 process 35251 /home/david/coding-3/gcc-git-bugfixing/build/gcc/cc1
(gdb) shell ls -al /proc/35251/fd
total 0
dr-x------. 2 david david 0 Apr 10 12:02 .
dr-xr-xr-x. 9 david david 0 Apr 10 12:02 ..
lrwx------. 1 david david 64 Apr 10 12:02 0 -> /dev/pts/8
lrwx------. 1 david david 64 Apr 10 12:02 1 -> /dev/pts/8
lrwx------. 1 david david 64 Apr 10 12:02 2 -> /dev/pts/8
l-wx------. 1 david david 64 Apr 10 12:02 3 -> /tmp/ccE3XfON.s
lr-x------. 1 david david 64 Apr 10 12:02 4 -> /dev/pts/8
which shows that I can type at the terminal during the hang, and then Ctrl-D to
inject what the content of "/dev/stdout" should be:
$ ./xgcc -B. -c ../../src/pr90034.c
Hello world
/dev/stdout:1:2: error: invalid preprocessing directive #def; did you mean
#ifdef?
1 | Hello world
| ^~~
| ifdef
