Re: broken pipe

[Thomas Klausner <wiz%NetBSD.org@localhost>]

On Fri, Aug 02, 2024 at 06:57:09PM +0200, Thomas Klausner wrote:
> Hi!
> 
> I noticed a day ago that some GUI applications on
> NetBSD-current/amd64/20240711, modular X, start randomly exiting with
> 'broken pipe'.
> 
> I first saw it with transmission-gtk, but then also with qbittorrent,
> which has completely different GUI library dependencies.
> 
> I've started qbittorrent in gdb, the backtrace when it dies starts with
> 
> __pwrite()
> pwrite() at  pthread_cancelstub.c:520
> libtorrent::aux::pwrite_all at libtorren-rasterbar-2.0.10/include/libtorrent/span.hpp:126
> operator() at libtorren-rasterbar-2.0.10/include/libtorrent/file.hpp:116
> ...
> 
> Has anyone else seen this?

I ktraced another run and got

 29512  10789 qbittorrent CALL  sendmsg(0x6e,0x7c3eb39fefd0,0)
 29512  10789 qbittorrent MISC  msghdr: [name=0x0, namelen=0, iov=0x7c3eb39ff040, iovlen=1, control=0x0, controllen=0, flags=4000000]
 29512  10789 qbittorrent RET   sendmsg -1 errno 32 Broken pipe

Is this an application error that it's not catching SIGPIPE for
sendmsg?
 Thomas