[Bug go/66016] Accessing nil Func's name results in crash

[jcajka at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66016

--- Comment #1 from Jakub Čajka <jcajka at redhat dot com> ---
Golang upstream ticket:

https://github.com/golang/go/issues/10696