Snapshot isolation error and seg fault in macos 10.12 evergreen build

[2019/10/16 21:20:36.215] ==================================================

[2019/10/16 21:20:36.215]    WiredTiger 3.2.2: test/csuite/test-suite.log

[2019/10/16 21:20:36.215] ==================================================

[2019/10/16 21:20:36.215] # TOTAL: 34

[2019/10/16 21:20:36.215] # PASS:  33

[2019/10/16 21:20:36.215] # SKIP:  0

[2019/10/16 21:20:36.215] # XFAIL: 0

[2019/10/16 21:20:36.215] # FAIL:  1

[2019/10/16 21:20:36.215] # XPASS: 0

[2019/10/16 21:20:36.215] # ERROR: 0

[2019/10/16 21:20:36.215] .. contents:: :depth: 2

[2019/10/16 21:20:36.215] FAIL: import/smoke.sh

[2019/10/16 21:20:36.215] =====================

[2019/10/16 21:20:36.215] snapshot-isolation error: Dumping page to WT_TEST.import/RUNDIR/pagedump

[2019/10/16 21:20:36.215] ../../../test/csuite/import/smoke.sh: line 31: 86902 Segmentation fault: 11  $top_builddir/test/format/t -1q -C "$EXT" -c $top_srcdir/test/format/CONFIG.stress -h $rundir backups=0 checkpoints=1 data_source=file ops=0 rebalance=0 salvage=0 threads=4 timer=2 verify=1

[2019/10/16 21:20:36.215] FAIL import/smoke.sh (exit status: 139)