Import wiredtiger-wiredtiger-2.7.0-1122-g9cf8eb2.tar.gz from wiredtiger branch mongodb-3.4

ref: 444981a..9cf8eb2

SERVER-23040  Coverity analysis defect 98151: Dereference after null check
WT-2123       Don't clear allocated memory if not required
WT-2318       Configurable thread wake up time
WT-2322       Join cursor with isolation read-uncommitted may give different results with Bloom filters
WT-2345       Evicting tiny pages creates small pages on disk
WT-2375       Add tests for collators
WT-2381       Dump utility discards table config
WT-2384       lt, le conditions for ordering cursor in join cursor
WT-2391       De-prioritize eviction from indexes
WT-2404       Add streaming pack/unpack methods to the extension API
WT-2414       Avoid extractor calls for ordering cursor in join cursor
WT-2418       Rebalance operation failing with EBUSY
WT-2426       Deadlock caused by recent changes to checkpoint handle locking
WT-2431       Join statistics documentation needed
WT-2435       __wt_evict_file_exclusive_on/off cleanups
WT-2436       lt, le conditions for ref cursor with "strategy=bloom" in join cursor
WT-2443       Getting statistic for all indexes used in join cursor
WT-2444       Broken flag test in wtperf, whitespace
WT-2447       Join cursor reads main table
WT-2448       Add no_scale flag to relevant statistics
WT-2449       Configure should check for a 64-bit build
WT-2451       Allow eviction of metadata
WT-2454       checkpoint_sync=false does *not* prevent flushes/sync to disk.
WT-2456       Update Power8 CRC32 Code
WT-2457       Dropping an LSM table can fail with EBUSY when no user ops are active
WT-2459       Allow Configure scripts to provide the --tag option for libtool when compiling on PPC
WT-2460       Checkpoint failing with WT_ROLLBACK
WT-2461       Python sweep01 test failing
WT-2463       Test that measures idle CPU usage fails under valgrind
WT-2464       Valgrind errors.
WT-2465       Coverity 1352899: Dereference before null check
WT-2466       Coverity 1352893 Buffer not null terminated
WT-2467       Coverity 1352894: Logically dead code
WT-2468       Coverity 1352896: Explicit null dereferenced
WT-2469       Coverity 1352897: Integer overflowed argument
WT-2470       Coverity 1352898: Resource leak
WT-2471       Review WiredTiger "int" printf formats
WT-2473       MSVC doesn't support PRId64
WT-2475       Have reconf script remove cached configure results
WT-2476       btree->evict_lock is being accessed after being destroyed
WT-2477       Missing define in Windows wiredtiger_config.h
WT-2478       Valgrind test failures
WT-2481       Recent changes affect LSM performance
WT-2482       Coverity 1353015, 1353016, out-of-bounds access
WT-2483       readonly02 periodically fails
WT-2484       Coverity 1345809: unchecked return value
WT-2485       Test/format failure with Floating point exception
WT-2487       Release memory in manydbs test
WT-2489       Fix compiler warnings from /test/manydbs
WT-2490       search_near() returns wrong key for column-store
WT-2492       Windows test_config04.test_config04.test_invalid_config crashes
WT-2493       Verbose lsm_manager unsupported
WT-2494       Review calls to __wt_free, plus minor bug in an error path.
WT-2495       Missing memory initialization leads to crash on Windows
WT-2496       Testing revealed error unable to read root page
WT-2497       Enhance test/format to save a copy of backup
WT-2498       LSM tree drop hangs when a user cursor is open
WT-2499       LSM shutdown race causes segfault
WT-2501       Dropping a just opened LSM tree isn't safe
WT-2502       Memory leak in locking handles for checkpoint
WT-2503       Build warning in lsm_tree.c
WT-2506       Using an uninitialised value

1 files changed, 4 insertions, 7 deletions

diff --git a/src/third_party/wiredtiger/src/schema/schema_truncate.c b/src/third_party/wiredtiger/src/schema/schema_truncate.c
index e7752b60ca4..d9a798b6ed8 100644
--- a/src/third_party/wiredtiger/src/schema/schema_truncate.c
+++ b/src/third_party/wiredtiger/src/schema/schema_truncate.c
@@ -131,22 +131,19 @@ int
 __wt_schema_range_truncate(
     WT_SESSION_IMPL *session, WT_CURSOR *start, WT_CURSOR *stop)
 {
-	WT_CURSOR *cursor;
 	WT_DATA_SOURCE *dsrc;
 	WT_DECL_RET;
 	const char *uri;
 
-	cursor = (start != NULL) ? start : stop;
-	uri = cursor->internal_uri;
+	uri = start->internal_uri;
 
 	if (WT_PREFIX_MATCH(uri, "file:")) {
-		if (start != NULL)
-			WT_CURSOR_NEEDKEY(start);
+		WT_CURSOR_NEEDKEY(start);
 		if (stop != NULL)
 			WT_CURSOR_NEEDKEY(stop);
-		WT_WITH_BTREE(session, ((WT_CURSOR_BTREE *)cursor)->btree,
+		WT_WITH_BTREE(session, ((WT_CURSOR_BTREE *)start)->btree,
 		    ret = __wt_btcur_range_truncate(
-			(WT_CURSOR_BTREE *)start, (WT_CURSOR_BTREE *)stop));
+		    (WT_CURSOR_BTREE *)start, (WT_CURSOR_BTREE *)stop));
 	} else if (WT_PREFIX_MATCH(uri, "table:"))
 		ret = __wt_table_range_truncate(
 		    (WT_CURSOR_TABLE *)start, (WT_CURSOR_TABLE *)stop);