Such handlers can come from address sanitizers and similar. When
combined with #4971, this forward-ports
676b9bc477
/ rust-lang/rust#69685
---------
Co-authored-by: Sebastian Ullrich <sebasti@nullri.ch>
Without this change, a stack overflow on Mac OS during tactic execution
can lead to the message:
terminated by signal SIGBUS (Misaligned address error)
This comes from `lean_alloc_small`. With the change, the process instead
terminates with the more accurate and actionable:
Stack overflow detected. Aborting.
