[Bug go/66303] runtime.Caller() returns infinitely deep stack frames on s390x

[stli at linux dot vnet.ibm.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66303

stli at linux dot vnet.ibm.com <stli at linux dot vnet.ibm.com> changed:

           What    |Removed                     |Added
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                 CC|                            |stli at linux dot vnet.ibm.com

--- Comment #11 from stli at linux dot vnet.ibm.com <stli at linux dot vnet.ibm.com> ---
I have created a bug in glibc
https://sourceware.org/bugzilla/show_bug.cgi?id=18508

and posted a patch
(https://www.sourceware.org/ml/libc-alpha/2015-06/msg00324.html) which omits
the cfi_startproc/cfi_endproc directives for __makecontext_ret. Thus backtrace
do not find any information about __makecontext_ret in .eh_frame and stops
backtrace like it is done with _start and thread_start functions.