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From: Paul Rubin <no.email@nospam.invalid>
Newsgroups: comp.lang.forth
Subject: Re: LLVM and Forth
Date: Tue, 04 Apr 2017 21:29:54 -0700
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Andrew Haley <andrew29@littlepinkcloud.invalid> writes:
> I think you'd be fine with "-fsanitize=undefined".  I agree that it
> wouldn't catch everything: there are no magic bullets.

http://blog.regehr.org/archives/523  might help some.