[perl #134044] Current perl undefined C behaviors

# New Ticket Created by  karl williamson 
# Please include the string:  [perl #134044]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=134044 >


I ran clang sanitize=undefined on current perl blead.

Attached is a file containing the failures.  It is in the form of a 
patch (not intended to be applied) of a typical error message from asan 
as a comment preceding the line where the problem occurs in the code.

On #irc, Tony Cook pointed out that probably the integer overflows are 
ok due to our use of -fwrapv.

But I'm creating a ticket for it, so ensure more people look.

• [perl #134044] Current perl undefined C behaviors by karl williamson
• Re: [perl #134044] Current perl undefined C behaviors by Dave Mitchell
• Re: [perl #134044] Current perl undefined C behaviors by Karl Williamson