Hi, On 2022-08-11 20:06:02 -0500, Justin Pryzby wrote: > On Thu, Aug 11, 2022 at 01:03:43PM -0700, Andres Freund wrote: > > Hi, > > > > For my optimized builds I've long used -O3 -march=native. After one of the > > On what kind of arch ?
x86-64 cascadelake. I've since debugged this further. It's not even -march that's the problem, it's the difference between -mtune=broadwell and -mtune=skylake, even with -march=x86-64. > > Given that I did not encounter this problem with gcc-12 before, and that > > gcc-12 has been released, it seems less likely to be a bug in our code > > highlighted by a new optimization and more likely to be a bug in a gcc > > bugfix, > > but it's definitely not clear. > > debian testing is now defaulting to gcc-12. > https://tracker.debian.org/news/1348007/accepted-gcc-defaults-1198-source-into-unstable/ > > Are you sure you were building with gcc-12 and not gcc(default) which, until 3 > weeks ago, was gcc-11 ? Yes. I'm now bisecting... Greetings, Andres Freund
