Heisenbugs

[pvaneynd]

Lazy sbcl has one heck of a heisenbug. It compiles itself,passes the test but fails in the compilation of a new version. When you strace it the error (file not found) becomes a sig11. When you ltrace it the place moves, also when you gdb the lisp. :-( But I can trigger the bug now by hitting calculating 100000! in the stupid way. It hits the stack guard in the normal version. In the lazy version it hits the guard, starts an error and then gets a sig11 !

This will some time to resolve, time I don't have :-(.