Tom Lane wrote:
Stefan Kaltenbrunner <[EMAIL PROTECTED]> writes:
at least one of my buildfarm members (emu) is crashing on what seems
totally unrelated regression tests for a few days now:
I was wondering about that ...
it took me about 10 tries to reproduce that manually and I'm getting the
following stacktrace:
#0 varbit_out (fcinfo=0x88c75000) at varbit.c:549
549 x = *sp;
Just eyeballing that code, it looks like it will try to fetch the byte
immediately beyond the end of the bit array, when the number of bits is
an exact multiple of 8. This is unlikely to cause a problem but it
*could* happen that the input is right up against the end of memory.
Could you check whether that is what happened here? (The important
question is whether the input seems to be sane, ie, "len" isn't huge.)
"end of memory" sounds familiar to:
http://archives.postgresql.org/pgsql-hackers/2005-06/msg00819.php
which is how emu is (still) set up.
as for len it seems to be 0:
#0 varbit_out (fcinfo=0x88c75000) at varbit.c:549
s = (VarBit *) 0x88c75000
result = 0x84d33128 ""
r = 0x84d33128 ""
sp = (bits8 *) 0x88c75000 <Address 0x88c75000 out of bounds>
x = 0 '\0'
i = 0
k = 0
len = 0
Stefan
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