pgsql: Fix unsafe coding in ReorderBufferCommit().

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix unsafe coding in ReorderBufferCommit().
Date: 2015-01-24 18:25:37
Message-ID: E1YF5Or-0004c7-Ol@gemulon.postgresql.org
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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
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/f8a4dd2e141a12e349882edecc683504acb82ec8

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

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