Bug#818652: dovecot-imapd: Crash upon virtual folder selection after update to 1:2.2.21-1 (follow-up)

[Petter Reinholdtsen]

In addition to the gdb backtrace, can you try to get a crash report using
valgrind?  It tend to explain in more details why a segfault happen.
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Happy hacking
Petter Reinholdtsen