Hey William, On Thursday, July 25, 2013 8:27:21 PM UTC+5:30, Volker Braun wrote: > > The problem is that exceptions raised by the inputsplitter are not handled > by IPython. I've asked at IPython-devel at > http://python.6.x6.nabble.com/InputSplitter-and-SyntaxError-td5025938.htmlbut > didn't get an answer so far. > > >> That said, in this particular case: >> >> preparse('R.<t> = QQ{]') >> >> outputs something that looks like a bug in the preparser implementation: >> >> ... >> opening = constructor.rindex('[') >> ValueError: substring not found >> >> If anything, it should be raising a SyntaxError, right? >> >> William >> > In my hack patch, I change this to a syntax error (although I probably should catch any exception and convert it to a SyntaxError). However by raising *any* (standard) exception in the inputsplitter, it is not caught by IPython and so it gets viewed as a Sage crash as per Volker's statement.
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