diff --git a/js/src/jit-test/tests/ion/bug912152.js b/js/src/jit-test/tests/ion/bug912152.js
new file mode 100644
index 00000000000..4c429fa46a2
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug912152.js
@@ -0,0 +1,7 @@
+
+function foo() {
+    try {
+        this.f = 0;
+    } finally {}
+}
+new foo();
diff --git a/js/src/jit/Ion.cpp b/js/src/jit/Ion.cpp
index 19c75358e3e..9f2c5f9f54d 100644
--- a/js/src/jit/Ion.cpp
+++ b/js/src/jit/Ion.cpp
@@ -1599,12 +1599,6 @@ IonCompile(JSContext *cx, JSScript *script,
     if (!script->ensureRanAnalysis(cx))
         return AbortReason_Alloc;
 
-    // Try-finally is not yet supported.
-    if (script->analysis()->hasTryFinally()) {
-        IonSpew(IonSpew_Abort, "Has try-finally.");
-        return AbortReason_Disable;
-    }
-
     LifoAlloc *alloc = cx->new_<LifoAlloc>(BUILDER_LIFO_ALLOC_PRIMARY_CHUNK_SIZE);
     if (!alloc)
         return AbortReason_Alloc;
diff --git a/js/src/jit/IonBuilder.cpp b/js/src/jit/IonBuilder.cpp
index f5a097f9bd3..eb94aa8070b 100644
--- a/js/src/jit/IonBuilder.cpp
+++ b/js/src/jit/IonBuilder.cpp
@@ -3364,7 +3364,8 @@ IonBuilder::jsop_try()
         return abort("Try-catch support disabled");
 
     // Try-finally is not yet supported.
-    JS_ASSERT(!script()->analysis()->hasTryFinally());
+    if (script()->analysis()->hasTryFinally())
+        return abort("Has try-finally");
 
     graph().setHasTryBlock();