[limon@widder]$ MAIL=sdbox:~/.sdbox gdb /usr/libexec/dovecot/imap                                                                                                                                                                ~
GNU gdb (Gentoo 7.3.1 p2) 7.3.1
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Reading symbols from /usr/libexec/dovecot/imap...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/libexec/dovecot/imap
warning: Could not load shared library symbols for linux-gate.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
process 21303 is executing new program: /usr/bin/doveconf
warning: Could not load shared library symbols for linux-gate.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
process 21303 is executing new program: /usr/libexec/dovecot/imap
warning: Could not load shared library symbols for linux-gate.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
* PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS SPECIAL-USE SEARCH=FUZZY COMPRESS=DEFLATE] Logged in as limon
* STATUS "INBOX/Lists" (UNSEEN)

Program received signal SIGSEGV, Segmentation fault.
0xb7cf97f3 in ?? () from /usr/lib/dovecot/lib20_virtual_plugin.so
(gdb) bt full
#0  0xb7cf97f3 in ?? () from /usr/lib/dovecot/lib20_virtual_plugin.so
No symbol table info available.
#1  0x080dd260 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb)