At Fri, 25 Oct 2019 12:28:38 -0400, Tom Lane <t...@sss.pgh.pa.us> wrote in > Jehan-Guillaume de Rorthais <j...@dalibo.com> writes: > > When investigating for the bug reported in thread "logical replication - > > negative bitmapset member not allowed", I found a way to seg fault > > postgresql > > only when cassert is enabled. > > ... > > I hadn't time to digg further yet. However, I don't understand why this > > crash > > is triggered when cassert is enabled. > > Most likely, it's not so much assertions that provoke the crash as > CLOBBER_FREED_MEMORY, ie the actual problem here is use of already-freed > memory.
Agreed. By the way I didn't get a crash by Jehan's script with the --enable-cassert build of the master HEAD of a few days ago. FWIW I sometimes got SEGVish crashes or mysterious misbehavor when some structs were changed and I didn't do "make clean". Rarely I needed "make distclean". (Yeah, I didn't ususally turn on --enable-depend..) regards. -- Kyotaro Horiguchi NTT Open Source Software Center
