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path: root/components/script/dom/bindings/codegen/Configuration.py
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-rw-r--r--components/script/dom/bindings/codegen/Configuration.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/components/script/dom/bindings/codegen/Configuration.py b/components/script/dom/bindings/codegen/Configuration.py
index 835bcbe4774..9a1120769c8 100644
--- a/components/script/dom/bindings/codegen/Configuration.py
+++ b/components/script/dom/bindings/codegen/Configuration.py
@@ -233,7 +233,8 @@ class Descriptor(DescriptorProvider):
# them as having a concrete descendant.
self.concrete = (not self.interface.isCallback() and
not self.interface.isNamespace() and
- not self.interface.getExtendedAttribute("Abstract"))
+ not self.interface.getExtendedAttribute("Abstract") and
+ not spiderMonkeyInterface)
self.hasUnforgeableMembers = (self.concrete and
any(MemberIsUnforgeable(m, self) for m in
self.interface.members))