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The RTLD_NODELETE change (ticket 7947) does not appear to solve this 
problem; in fact, it's possible that it makes it manifest under 
different circumstances.

However, the upstream glibc bug has now been fixed.  References:

https://sourceware.org/git/?
p=glibc.git;a=commit;h=57707b7fcc38855869321f8c7827bfe21d729f37
https://www.sourceware.org/ml/libc-alpha/2016-12/msg00859.html
https://bugzilla.redhat.com/show_bug.cgi?id=1398370