[MIT-Scheme-devel] compiler bug

[Chris Hanson]

FYI, while testing my most recent changes, I ran across a recent
compiler bug.  To reproduce: using the current compiler, do a fresh
compile from sources.  Then use that compiler to do another fresh
compile.  The second compilation hangs during the compilation of
"cref/anfile" (the very first file to compile).  The problem appears
to be that the compiler is running map over a list of items, but that
the list is circular.

This bug is not present in the 20090107 release (starting with that
compiler as stage 0).  I haven't tried using the 20090107 compiler as
stage 0 and compiling current sources.

I'm going to start searching for the commit that caused this, but if
anyone has any ideas where the problem is I'd love to hear them.