CRASH relocating ArchLinux glibc 2.25

I'm filing this based on an email thread on the users list: https://groups.google.com/forum/#!topic/dynamorio-users/4B2Jf34we4U

Some key snippets:

...client crashes during relocation. ArchLinux, glibc 2.25, Linux 4.11.3 64-bit I traced it to this specific case https://github.com/DynamoRIO/dynamorio/blob/17106ec7faeeb170d53f4ceea6a69bc447455deb/core/unix/module_elf.c#L1776 (ELF_R_IRELATIVE) in module_elf.c. The first time it's hit, it looks like the loader crashes. ...commenting out the aforementioned case statement seems to work fine for an empty test client. It looks like it hits that case 8 times when loading libc 2.25 on my system (details above). ... This was ArchLinux specific. A new glibc released today (still v2.25) fixes this issue.