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-rw-r--r--js/src/vm/ObjectGroup.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/js/src/vm/ObjectGroup.cpp b/js/src/vm/ObjectGroup.cpp
index 248abb73a..d6a8fcaa4 100644
--- a/js/src/vm/ObjectGroup.cpp
+++ b/js/src/vm/ObjectGroup.cpp
@@ -579,7 +579,7 @@ ObjectGroup::defaultNewGroup(ExclusiveContext* cx, const Class* clasp,
AddTypePropertyId(cx, group, nullptr, NameToId(names.lastIndex), TypeSet::Int32Type());
} else if (clasp == &StringObject::class_) {
AddTypePropertyId(cx, group, nullptr, NameToId(names.length), TypeSet::Int32Type());
- } else if (IsErrorProtoKey(StandardProtoKeyOrNull(obj))) {
+ } else if (ErrorObject::isErrorClass(clasp)) {
AddTypePropertyId(cx, group, nullptr, NameToId(names.fileName), TypeSet::StringType());
AddTypePropertyId(cx, group, nullptr, NameToId(names.lineNumber), TypeSet::Int32Type());
AddTypePropertyId(cx, group, nullptr, NameToId(names.columnNumber), TypeSet::Int32Type());