I just encountered this myself. Was a bit bored, so did some testing.
mdadm master HEAD (4.0) does not segfault, nor does the HEAD of the
branch mdadm-3.3.4
However, if you acquire the actual version of source used by ubuntu
(3.3, from 2013(!)) and compile, and run through gdb, you get:
Program
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: mdadm (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1691763
Title:
mdad
