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-rw-r--r--js/src/jit/IonAnalysis.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/js/src/jit/IonAnalysis.cpp b/js/src/jit/IonAnalysis.cpp
index 90303255d..2c9ffb607 100644
--- a/js/src/jit/IonAnalysis.cpp
+++ b/js/src/jit/IonAnalysis.cpp
@@ -2188,6 +2188,12 @@ IsRegExpHoistable(MIRGenerator* mir, MDefinition* regexp, MDefinitionVector& wor
bool
jit::MakeMRegExpHoistable(MIRGenerator* mir, MIRGraph& graph)
{
+ // If we are compiling try blocks, regular expressions may be observable
+ // from catch blocks (which Ion does not compile). For now just disable the
+ // pass in this case.
+ if (graph.hasTryBlock())
+ return true;
+
MDefinitionVector worklist(graph.alloc());
for (ReversePostorderIterator block(graph.rpoBegin()); block != graph.rpoEnd(); block++) {