Re: Fwd: Core dump with nested CREATE TEMP TABLE

On 9/4/15 12:41 PM, Tom Lane wrote:
> I wrote:
>>> After review of all the callers of RelationClearRelation, it seems like
>>> most of them already have sufficient guards to prevent triggering of the
>>> Assert. The ones that lack such tests are AtEOXact_cleanup and
>>> AtEOSubXact_cleanup. So what I'm now thinking is that those should do
>>> something along the lines of
>
>> Specifically, this, which can be shown to mitigate the results of the
>> problem cases in an otherwise-unpatched build.
>
> And pushed. I noticed that while the relcache.c fix mitigates the error
> pretty well in 9.3 and up, in the older branches you still end up with
> a PANIC due to error stack overflow. This may indicate that there's
> some patch we'd have been better off back-porting. However, with the
> Portal changes in place the test cases work in all branches, so I'm
> not excited enough to pursue the point further myself.

I was about to test this and was verifying that the crash still worked
when I noticed this in the logs (9.4.1, not HEAD). Not sure if there's
any realion here or not...

WARNING: relation "pg_proc" page 121 is uninitialized --- fixing
WARNING: relation "pg_proc" page 122 is uninitialized --- fixing
WARNING: relation "pg_proc" page 123 is uninitialized --- fixing
WARNING: relation "pg_proc" page 124 is uninitialized --- fixing
WARNING: relation "pg_proc" page 125 is uninitialized --- fixing
WARNING: relation "pg_proc" page 126 is uninitialized --- fixing
WARNING: relation "pg_proc" page 127 is uninitialized --- fixing
WARNING: relation "pg_proc" page 128 is uninitialized --- fixing
WARNING: relation "pg_proc" page 129 is uninitialized --- fixing
WARNING: relation "pg_proc" page 130 is uninitialized --- fixing
WARNING: relation "pg_proc" page 131 is uninitialized --- fixing
WARNING: relation "pg_proc" page 132 is uninitialized --- fixing
WARNING: relation "pg_proc" page 133 is uninitialized --- fixing
WARNING: relation "pg_proc" page 134 is uninitialized --- fixing
WARNING: relation "pg_proc" page 135 is uninitialized --- fixing
WARNING: relation "pg_proc" page 136 is uninitialized --- fixing
WARNING: relation "pg_proc" page 137 is uninitialized --- fixing
WARNING: relation "pg_proc" page 138 is uninitialized --- fixing
WARNING: relation "pg_proc" page 139 is uninitialized --- fixing
WARNING: relation "pg_proc" page 140 is uninitialized --- fixing
WARNING: relation "pg_proc" page 141 is uninitialized --- fixing
WARNING: relation "pg_proc" page 142 is uninitialized --- fixing
WARNING: relation "pg_proc" page 143 is uninitialized --- fixing
WARNING: relation "pg_proc" page 144 is uninitialized --- fixing
WARNING: relation "pg_proc" page 145 is uninitialized --- fixing
WARNING: relation "pg_proc" page 146 is uninitialized --- fixing
WARNING: relation "pg_proc" page 147 is uninitialized --- fixing
WARNING: relation "pg_proc" page 148 is uninitialized --- fixing
WARNING: relation "pg_proc" page 149 is uninitialized --- fixing
WARNING: relation "pg_proc" page 150 is uninitialized --- fixing
WARNING: relation "pg_proc" page 151 is uninitialized --- fixing
WARNING: relation "pg_proc" page 152 is uninitialized --- fixing
WARNING: relation "pg_proc" page 153 is uninitialized --- fixing
WARNING: relation "pg_proc" page 154 is uninitialized --- fixing
WARNING: relation "pg_proc" page 155 is uninitialized --- fixing
WARNING: relation "pg_proc" page 156 is uninitialized --- fixing
WARNING: relation "pg_proc" page 157 is uninitialized --- fixing
WARNING: relation "pg_proc" page 158 is uninitialized --- fixing
WARNING: relation "pg_proc" page 159 is uninitialized --- fixing
WARNING: relation "pg_proc" page 160 is uninitialized --- fixing
WARNING: relation "pg_proc" page 161 is uninitialized --- fixing
WARNING: relation "pg_proc" page 162 is uninitialized --- fixing
WARNING: relation "pg_proc" page 246 is uninitialized --- fixing
WARNING: relation "pg_depend" page 82 is uninitialized --- fixing
WARNING: relation "pg_depend" page 83 is uninitialized --- fixing
WARNING: relation "pg_depend" page 84 is uninitialized --- fixing
WARNING: relation "pg_depend" page 85 is uninitialized --- fixing
WARNING: relation "pg_depend" page 86 is uninitialized --- fixing
WARNING: relation "pg_depend" page 87 is uninitialized --- fixing
WARNING: relation "pg_depend" page 88 is uninitialized --- fixing
WARNING: relation "pg_depend" page 89 is uninitialized --- fixing
WARNING: relation "pg_depend" page 90 is uninitialized --- fixing
WARNING: relation "pg_depend" page 91 is uninitialized --- fixing
WARNING: relation "pg_depend" page 92 is uninitialized --- fixing
WARNING: relation "pg_depend" page 93 is uninitialized --- fixing
WARNING: relation "pg_depend" page 94 is uninitialized --- fixing
WARNING: relation "pg_depend" page 95 is uninitialized --- fixing
WARNING: relation "pg_depend" page 96 is uninitialized --- fixing
WARNING: relation "pg_depend" page 112 is uninitialized --- fixing
WARNING: relation "pg_depend" page 128 is uninitialized --- fixing
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
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