OutOfMemoryError in CodeServer after multiple unexpected failed recompiles

[jnehlmeier]

GWT version: HEAD

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While encountering #10116 I did multiple recompiles via CodeServer to figure out the root cause of the issue. All these recompiles failed with the mentioned NPE. Finally after discovering the workaround the compile continued but failed with an OutOfMemoryError.

It looks like CodeServer or Compiler do not cleanup heap correctly if an unexpected exception is caught in GwtAstBuilder.createMembers() and rethrown as InternalCompilerException.