pgsql: Fix unsafe coding in ReorderBufferCommit(). - Mailing list pgsql-committers

Fix unsafe coding in ReorderBufferCommit().

"iterstate" must be marked volatile since it's changed inside the PG_TRY
block and then used in the PG_CATCH stanza.  Noted by Mark Wilding of
Salesforce.  (We really need to see if we can't get the C compiler to warn
about this.)

Also, reset iterstate to NULL after the mainline ReorderBufferIterTXNFinish
call, to ensure the PG_CATCH block doesn't try to do that a second time.

Branch
------
REL9_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/91964c3ed1c49d9a8670d3f85a660181cc541c7c

Modified Files
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src/backend/replication/logical/reorderbuffer.c |    7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)