1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/regress/debug-exception-in-fast-import.js b/js/src/jit-test/tests/wasm/regress/debug-exception-in-fast-import.js
new file mode 100644
index 0000000000..bba37b38b0
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/regress/debug-exception-in-fast-import.js
@@ -0,0 +1,21 @@
+// |jit-test| skip-if: !wasmDebuggingEnabled()
+g = newGlobal({newCompartment: true});
+g.parent = this;
+g.eval("(" + function() {
+    Debugger(parent).onExceptionUnwind = function(frame) {}
+} + ")()")
+
+o = {};
+
+let { exports } = wasmEvalText(`
+  (module (import "" "inc" (func $imp)) (func) (func $start (call $imp)) (start $start) (export "" (func $start)))
+`, {
+    "": {
+        inc: function() { o = o.p; }
+    }
+});
+
+// after instanciation, the start function has been executed and o is undefined.
+// This second call will throw in the imported function:
+
+assertErrorMessage(exports[""], TypeError, /undefined/);