eu-strip on .rustc section produce error information

[chenziyang (C)]

Hi elfutils maintainers

I am running 'rpmbuild -ba sysmaster.spec', and produce following error info:
eu-strip: Cannot remove symbol [742] from allocated symbol table [3]

This error is caused by strip_to_debug() function in /usr/bin/find-debuginfo.sh which is triggered by rpm-build
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Steps to Reproduce:
eu-strip -R .rustc libtarget_1.so
Actual result:
eu-strip: Cannot remove symbol [742] from allocated symbol table [3]

OR
eu-strip -remove-comment libtarget.so.debug1 libtarget_1.so
Actual result: eu-strip: Cannot remove symbol [742] from allocated symbol table [3]

Expected:
eu-strip runs without error info

I am wondering is this an error in strip.c? Because from 1380961<https://bugzilla.redhat.com/show_bug.cgi?id=1380961> Mark said 'The .rustc section is a non-allocated section' and the comment in strip.c said 'Removing a real symbol from an allocated symbol table is hard and probably a mistake'. There seems to be a conflict.

Please let me know if you need any further information or if there is anything else I can do to help. I appreciate your time and look forward to hearing back from you soon.

Best regards,
Ziyang
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