TypeAnalyzer infinite loop

[danrubel]

Given the cyclic definition below, the TypeAnalyzer$Analyzer$AbstractMethodFinder.visitClass(DartClass) never returns.

class Foo extends Bar {
}

class Bar extends Foo {
}

[DartBot]

This comment was originally written by mmendez@google.com

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[scheglov]

Set owner to @scheglov.
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[scheglov]

Added Started label.

[scheglov]

Fixed in trunk.
Now we will not continue identifying unimplemented methods, if there is cyclic declaration.

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