parrot/parrot — pull request #762 by rurban (2012-05-04 03:33:22+00:00)
Title: mark stack-overflow gc for clang -faddress-sanitizer

http://clang.llvm.org/docs/AddressSanitizer.html fails in
trace_mem_block() with a stack invalid READ, which is actually valid in our GC.
Since this is the only function we just use the recommended detection and attribute
here once.

Personally I'm not quite convinced that parrot's GC really does that. But with this
attribute all tests pass now.