Provide better toString() for implicit closures

[DartBot]

This issue was originally filed by ladicek@gmail.com

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Calling toString() on a closure always returns "Closure". However, if the closure is implicit (i.e., if it actually is a closurized function), the toString() method can provide more details. This can be very helpful when dealing with accidental closurization.

I'm attaching a patch against the Dart VM. Please, let me know if you agree with this change, so that I can issue a pull request, or if you want to discuss it some more.

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Attachment:
0001-better-toString-for-closurized-functions.patch (1.09 KB)

[madsager]

Added Area-VM, Triaged labels.

Set owner to @crelier.

[crelier]

Printing the signature of the closure will also be useful.
I have a cl under review.

Thanks to Ladislav Thon for the suggestion!

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Added Started label.

[crelier]

Fixed in r6861.

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Added Fixed label.