[Sbcl-devel] breakpointed trace

[Christophe R. <cs...@ca...>]

Hi,

Here's an interesting one.  In an x86/SBCL wot I built myself,
  (trace sb-c::logxor-derive-type-aux :encapsulate nil)
  (defun foo (x y) (logxor x y))
works as expected.

In an x86/SBCL wot I downloaded from Debian,
  (trace sb-c::logxor-derive-type-aux :encapsulate nil)
  (defun foo (x y) (logxor x y))
gives me a segmentation fault, followed by 10 errors of the "NIL is
not of type SB-DI::FRAME" variety.

This smells of libc (or equivalent) skew, but I can't see why.  I seem
to remember that we had similar problems with **environ, but the
details are getting a bit hazy at my advanced age.  Does anyone else
have any ideas?

Cheers,

Christophe
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