> From: Richard Copley <rcopley@gmail.com>
> Date: Wed, 18 Sep 2019 19:35:31 +0100
> Cc: Juanma Barranquero <lekktu@gmail.com>, Paul Eggert <eggert@cs.ucla.edu>,
>  martin rudalics <rudalics@gmx.at>, Emacs Development <emacs-devel@gnu.org>
>
> Thread 1 hit Breakpoint 2, Fload (file=XIL(0x40123a4), noerror=XIL(0), nomessage=XIL(0x30), nosuffix=XIL
> (0), must_suffix=XIL(0x30)) at lread.c:1437
> 1437            report_file_error ("Opening stdio stream", file);
>
> Thread 5 (Thread 19220.0x778):
> #0  0x00007ffd293ceae4 in ntdll!ZwDelayExecution () from C:\WINDOWS\SYSTEM32\ntdll.dll
> #1  0x00007ffd26881e41 in SleepEx () from C:\WINDOWS\System32\KernelBase.dll
> #2  0x00000004003f026e in timer_loop (arg=0x400929120 <real_itimer>) at w32proc.c:473
> #3  0x00007ffd27e55bb4 in KERNEL32!BaseThreadInitThunk () from C:\WINDOWS\System32\kernel32.dll
> #4  0x00007ffd29389ee1 in ntdll!RtlUserThreadStart () from C:\WINDOWS\SYSTEM32\ntdll.dll
> #5  0x0000000000000000 in ?? ()
> Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thanks, but this is the wrong thread...

Anyway, the problem should be fixed by now, please try the latest
master.