Re: Recent SIGSEGV failures in buildfarm HEAD

Seneca Cunningham <tentra(at)gmail(dot)com> writes:
> I don't have a core, but here's the CrashReporter output for both
> of jackal's failed runs:

Wow, some actual data, rather than just noodling about how to get it ...
thanks!

> ...
> 11 postgres 0x0022b2e3 RelationIdGetRelation + 110 (relcache.c:1496)
> 12 postgres 0x00020868 relation_open + 84 (heapam.c:697)
> 13 postgres 0x0002aab9 index_open + 32 (indexam.c:140)
> 14 postgres 0x0002a9d4 systable_beginscan + 289 (genam.c:184)
> 15 postgres 0x002279e4 RelationInitIndexAccessInfo + 1645 (relcache.c:1200)
> 16 postgres 0x0022926a RelationBuildDesc + 3527 (relcache.c:866)
> 17 postgres 0x0022b2e3 RelationIdGetRelation + 110 (relcache.c:1496)
> 18 postgres 0x00020868 relation_open + 84 (heapam.c:697)
> 19 postgres 0x0002aab9 index_open + 32 (indexam.c:140)
> 20 postgres 0x0002a9d4 systable_beginscan + 289 (genam.c:184)
> 21 postgres 0x002279e4 RelationInitIndexAccessInfo + 1645 (relcache.c:1200)
> 22 postgres 0x0022926a RelationBuildDesc + 3527 (relcache.c:866)
> 23 postgres 0x0022b2e3 RelationIdGetRelation + 110 (relcache.c:1496)
> ...

What you seem to have here is infinite recursion during relcache
initialization. That's surely not hard to believe, considering I just
whacked that code around, and indeed changed some of the tests that are
intended to prevent such recursion. But what I don't understand is why
it'd be platform-specific, much less not perfectly repeatable on the
platforms where it does manifest. Anyone have a clue?

regards, tom lane