debugger doesn't stop at a breakpoint within a closure within a closure

[devoncarew]

The debugger doesn't seem to stop at breakpoints inside closures within closures. For the following snippet, a breakpoint at print("foo") works but one at print("bar") doesn't.

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void main() {
  print("Hello, World!");
  
  var foo = () {
    print("foo");
    
    var bar = () {
      print("bar");
    };
    
    bar();
  };
  
  foo();
}

[munificent]

Just to give some flavor on why this matters. Out unit tests are moving towards a new API based on two functions, group() and test(). Those both take closures, so typical unit test files look like:

main() {
  group('Pubspec', () {
    group('parse()', () {
      test("throws if the description isn't valid", () {
        var sources = new SourceRegistry();
        sources.register(new MockSource());

        throwsBadFormat(() {
        new Pubspec.parse('''...''', sources);
        });
      });
    });
  });
}

[jmesserly]

A related issue:

When going up the stack, I couldn't see locals in closures in Dartium. This was with an older build though, I haven't tried the latest yet. But it might be the same issue?

[jmesserly]

Just to add on to Bob's comment: any code using async or events will also use closures pretty heavily. And those are often the places where you really need to debug things :)

[DartBot]

This comment was originally written by @mhausner

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Re: comment 2. Inspecting captured variables does not work yet.

[DartBot]

This comment was originally written by @mhausner

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I have a fix out for review.

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Added Started label.

[DartBot]

This comment was originally written by @mhausner

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This is fixed in r9065.

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Added Fixed label.