> Probably there should be an effort to switch to heap for anything that
> might get large and reserve alloca() usage just for things we know for a
> fact will not get too large, but that hasn't been done.

... and anywhere you use a scanf variant, glibc is also using
alloca(), without knowing any bound:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=553206

        Eddy.

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