test and fix for crash parsing regexp /0{0/ #102
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This admittedly strange regexp is a minimized version of a test case from the coffee-script project. Judging from a comment in NativeRegExp.java, incomplete quantifiers are supposed to be ignored. Instead, an java.lang.ArrayIndexOutOfBoundsException is thrown, causing the REPL to terminate:
The change set in this pull request includes a unit test and fix for the open coded parsing of {} quantifiers.