Import wiredtiger: b50d65e8560446e2cd205594e07bbcaa2305b144 from branch mongodb-4.2

ref: d86b3a8a33..b50d65e856
for: 4.3.1

WT-4502       Assertion checking hazard pointers on page discard is too strong
WT-4733       Change test/format to do longer-term repeatable read testing
WT-4743       Fix memory leaks and core dumps in page-split error handling
WT-4786       Coverity: Invalid format specifiers in printf-like invocations
WT-4805       Modify error message verification for test_prepare04.py
WT-4812       Fix the Python distribution script for Python3 changes
WT-4818       Add debugging of bad read file descriptor when files are missing during recovery
WT-4840       WT_CURSOR.modify must require explicit, snapshot-isolation transaction
WT-4864       Coverity: Redundant NULL check
WT-4866       Coverity: WT_SESSION.import can leak memory
WT-4867       Skip assertion when reserved updates are seen
WT-4882       Improve checkpoint performance when there are large metadata pages
WT-4887       Skip read timestamp required assert during recovery
WT-4888       Remove support for Berkeley DB
WT-4891       WT_SESSION.verify memory allocation overrun
WT-4895       Fix debug eviction mode so it chooses skew more randomly
WT-4910       Port Windows SConstruct to Python 3

1 files changed, 1 insertions, 1 deletions

diff --git a/src/third_party/wiredtiger/src/block/block_ckpt.c b/src/third_party/wiredtiger/src/block/block_ckpt.c
index db6b458d671..a968370c2a5 100644
--- a/src/third_party/wiredtiger/src/block/block_ckpt.c
+++ b/src/third_party/wiredtiger/src/block/block_ckpt.c
@@ -140,7 +140,7 @@ err:		/*
 	}
 
 	/* Checkpoints don't need the original information, discard it. */
-	if (checkpoint && ci != NULL)
+	if (checkpoint)
 		__wt_block_ckpt_destroy(session, ci);
 
 	return (ret);