1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/breakpoint-multi-02.js b/js/src/jit-test/tests/debug/breakpoint-multi-02.js
new file mode 100644
index 000000000..d75afce47
--- /dev/null
+++ b/js/src/jit-test/tests/debug/breakpoint-multi-02.js
@@ -0,0 +1,42 @@
+// After clearing one breakpoint, another breakpoint at the same instruction still works.
+
+var g = newGlobal();
+var dbg = Debugger(g);
+var script = null;
+var handlers = [];
+dbg.onDebuggerStatement = function (frame) {
+    function handler(i) {
+        return {hit: function (frame) { g.log += '' + i; }};
+    }
+    var f = frame.eval("f").return;
+    var s = f.script;
+    if (script === null)
+        script = s;
+    else
+        assertEq(s, script);
+
+    var offs = s.getLineOffsets(g.line0 + 3);
+    for (var i = 0; i < 3; i++) {
+        handlers[i] = handler(i);
+        for (var j = 0; j < offs.length; j++)
+            s.setBreakpoint(offs[j], handlers[i]);
+    }
+};
+
+g.eval("var line0 = Error().lineNumber;\n" +
+       "function f() {\n" +     // line0 + 1
+       "    log += 'x';\n" +    // line0 + 2
+       "    log += 'y';\n" +    // line0 + 3
+       "}\n" +
+       "debugger;\n");
+assertEq(handlers.length, 3);
+
+g.log = '';
+g.f();
+assertEq(g.log, 'x012y');
+
+script.clearBreakpoint(handlers[0]);
+
+g.log = '';
+g.f();
+assertEq(g.log, 'x12y');