1 files changed, 2 insertions, 1 deletions
diff --git a/js/src/frontend/SharedContext.cpp b/js/src/frontend/SharedContext.cpp
index 7fa3b724fb..488e3bd384 100644
--- a/js/src/frontend/SharedContext.cpp
+++ b/js/src/frontend/SharedContext.cpp
@@ -45,7 +45,8 @@ SharedContext::SharedContext(FrontendContext* fc, Kind kind,
       inClass_(false),
       localStrict(false),
       hasExplicitUseStrict_(false),
-      isScriptExtraFieldCopiedToStencil(false) {
+      isScriptExtraFieldCopiedToStencil(false),
+      eligibleForArgumentsLength(true) {
   // Compute the script kind "input" flags.
   if (kind == Kind::FunctionBox) {
     setFlag(ImmutableFlags::IsFunction);