iRules containing an escaped newline character can cause TMM to crash.

I'd guess that's actually a false positive from iHealth on the "*\r\n*" switch case. I don't think there is actually a problem with that iRule in relation to CR135937.

SOL11427 describes the issue as being caused by syntax like this:

SOL11427: TMM cores when executing an iRule statement that contains a suspended command preceded by an escaped newline character

http://support.f5.com/kb/en-us/solutions/public/11000/400/sol11427.html

log local0. "my log statement split \
   over two lines with a backslash escaping the new line character!"

You could open a case with F5 Support to report this and get the heuristic checked/fixed.

Aaron