Fix rare core dump in BackendIdGetTransactionIds().
BackendIdGetTransactionIds() neglected the possibility that the PROC
pointer in a ProcState array entry is null. In current usage, this could
only crash if the other backend had exited since pgstat_read_current_status
saw it as active, which is a pretty narrow window. But it's reachable in
the field, per bug #12918 from Vladimir Borodin.
Back-patch to 9.4 where the faulty code was introduced.
Branch
------
REL9_4_STABLE
Details
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http://git.postgresql.org/pg/commitdiff/2897e069c1f4309a237a1fa4bf5d2fcd9c4b9868
Modified Files
--------------
src/backend/storage/ipc/sinvaladt.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
