hg: jdk/sandbox: 8231405: [Shenandoah] guarantee(d != NULL) failed: Null dominator info

[chris.hegarty at oracle.com]

Changeset: 222a91b9438a
Author:    roland
Date:      2019-09-26 17:49 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/222a91b9438a

8231405: [Shenandoah] guarantee(d != NULL) failed: Null dominator info
Reviewed-by: shade, rkennke

! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp
+ test/hotspot/jtreg/gc/shenandoah/compiler/CallMultipleCatchProjs.java