1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/breakpoint-dot-generator.js b/js/src/jit-test/tests/debug/breakpoint-dot-generator.js
new file mode 100644
index 0000000000..85ad7ac2e1
--- /dev/null
+++ b/js/src/jit-test/tests/debug/breakpoint-dot-generator.js
@@ -0,0 +1,35 @@
+const g = newGlobal({ newCompartment: true });
+g.eval(`
+function* func() {
+}
+`);
+const d = new Debugger();
+const dg = d.addDebuggee(g);
+const script = dg.makeDebuggeeValue(g.func).script;
+
+// The following test assumes the above `func` function has the following
+// bytecode sequences:
+//
+// 00000:  Generator                       # GENERATOR
+// 00001:  SetAliasedVar ".generator"      # GENERATOR
+// 00006:  InitialYield 0                  # RVAL GENERATOR RESUMEKIND
+
+// Setting a breakpoint at `SetAliasedVar ".generator"` should be disallow.
+let caught = false;
+try {
+  script.setBreakpoint(1, {});
+} catch (e) {
+  caught = true;
+  assertEq(e.message.includes("not allowed"), true);
+}
+
+assertEq(caught, true);
+
+// Setting breakpoints to other opcodes should be allowed.
+script.setBreakpoint(0, {});
+script.setBreakpoint(6, {});
+
+// Offset 1 shouldn't be exposed.
+assertEq(script.getPossibleBreakpoints().some(p => p.offset == 1), false);
+assertEq(script.getAllColumnOffsets().some(p => p.offset == 1), false);
+assertEq(script.getEffectfulOffsets().includes(1), false);