1 files changed, 58 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/async/bug1773650.js b/js/src/jit-test/tests/async/bug1773650.js
new file mode 100644
index 0000000000..8fcc3cf743
--- /dev/null
+++ b/js/src/jit-test/tests/async/bug1773650.js
@@ -0,0 +1,58 @@
+// This approach is based on async/debugger-reject-after-fulfill.js
+function searchLastBreakpointBeforeReturn(declCode, callCode) {
+  const g = newGlobal({ newCompartment: true });
+  const dbg = new Debugger(g);
+  g.eval(declCode);
+
+  let offset = 0;
+  dbg.onEnterFrame = function(frame) {
+    if (frame.callee && frame.callee.name == "f") {
+      frame.onStep = () => {
+        if (!g.returning) {
+          return undefined;
+        }
+
+        offset = frame.offset;
+        return undefined;
+      };
+    }
+  };
+  g.eval(callCode);
+  drainJobQueue();
+  assertEq(offset != 0, true);
+  return offset;
+}
+
+let declaration = `
+  var returning = false;
+  async function f() {
+    try {
+      throw undefined;
+    } catch (exc) {
+      try {
+        return (returning = true, "expected");
+      } catch {}
+    }
+  }`;
+let call = "var p = f();"
+
+let offset = searchLastBreakpointBeforeReturn(declaration, call);
+
+let g = newGlobal({ newCompartment: true });
+let dbg = new Debugger(g);
+g.eval(declaration);
+
+dbg.onEnterFrame = function(frame) {
+  if (frame.callee && frame.callee.name == "f") {
+    dbg.onEnterFrame = undefined;
+    frame.script.setBreakpoint(offset, {
+      hit() {
+        return { throw: "unexpected" };
+      }
+    });
+  }
+};
+
+try {
+  g.eval(call);
+} catch {}