Hi! After upgrade I'm noticing many coredummps, below is backtrace: $ echo "bt"|gdb ....

#0 o_stream_zlib_flush (stream=0xc8be5b27640) at ostream-zlib.c:222 222 if (o_stream_zlib_send_flush(zstream) < 0) (gdb) #0 o_stream_zlib_flush (stream=0xc8be5b27640) at ostream-zlib.c:222 #1 0x00007a695e8f09cd in o_stream_flush (stream=stream@entry=0xc8be5b276d0) at ostream.c:147 #2 0x00007a695e83c06f in o_stream_zlib_close (stream=0xc8be5b27640, close_parent=true) at ostream-zlib.c:35 #3 0x00007a695e8f0375 in o_stream_close_full (stream=stream@entry=0xc8be5b276d0, close_parents=close_parents@entry=true) at ostream.c:49 #4 0x00007a695e8f06e2 in o_stream_close (stream=stream@entry=0xc8be5b276d0) at ostream.c:85 #5 0x00007a695e8f1738 in o_stream_copy_error_from_parent (_stream=_stream@entry=0xc8be5b27640) at ostream.c:434 #6 0x00007a695e83c5cc in o_stream_zlib_flush (stream=0xc8be5b27640) at ostream-zlib.c:227 #7 0x00007a695e8f09cd in o_stream_flush (stream=stream@entry=0xc8be5b276d0) at ostream.c:147 #8 0x00007a695e83c06f in o_stream_zlib_close (stream=0xc8be5b27640, close_parent=true) at ostream-zlib.c:35 #9 0x00007a695e8f0375 in o_stream_close_full (stream=stream@entry=0xc8be5b276d0, close_parents=close_parents@entry=true) at ostream.c:49 #10 0x00007a695e8f06e2 in o_stream_close (stream=stream@entry=0xc8be5b276d0) at ostream.c:85 #11 0x00007a695e8f1738 in o_stream_copy_error_from_parent (_stream=_stream@entry=0xc8be5b27640) at ostream.c:434 #12 0x00007a695e83c5cc in o_stream_zlib_flush (stream=0xc8be5b27640) at ostream-zlib.c:227 #13 0x00007a695e8f09cd in o_stream_flush (stream=stream@entry=0xc8be5b276d0) at ostream.c:147 #14 0x00007a695e83c06f in o_stream_zlib_close (stream=0xc8be5b27640, close_parent=true) at ostream-zlib.c:35 #15 0x00007a695e8f0375 in o_stream_close_full (stream=stream@entry=0xc8be5b276d0, close_parents=close_parents@entry=true) at ostream.c:49 #16 0x00007a695e8f06e2 in o_stream_close (stream=stream@entry=0xc8be5b276d0) at ostream.c:85 #17 0x00007a695e8f1738 in o_stream_copy_error_from_parent (_stream=_stream@entry=0xc8be5b27640) at ostream.c:434 #18 0x00007a695e83c5cc in o_stream_zlib_flush (stream=0xc8be5b27640) at ostream-zlib.c:227 #19 0x00007a695e8f09cd in o_stream_flush (stream=stream@entry=0xc8be5b276d0) at ostream.c:147 #20 0x00007a695e83c06f in o_stream_zlib_close (stream=0xc8be5b27640, close_parent=true) at ostream-zlib.c:35 #21 0x00007a695e8f0375 in o_stream_close_full (stream=stream@entry=0xc8be5b276d0, close_parents=close_parents@entry=true) at ostream.c:49 #22 0x00007a695e8f06e2 in o_stream_close (stream=stream@entry=0xc8be5b276d0) at ostream.c:85 #23 0x00007a695e8f1738 in o_stream_copy_error_from_parent (_stream=_stream@entry=0xc8be5b27640) at ostream.c:434 #24 0x00007a695e83c5cc in o_stream_zlib_flush (stream=0xc8be5b27640) at ostream-zlib.c:227 #25 0x00007a695e8f09cd in o_stream_flush (stream=stream@entry=0xc8be5b276d0) at ostream.c:147 #26 0x00007a695e83c06f in o_stream_zlib_close (stream=0xc8be5b27640, close_parent=true) at ostream-zlib.c:35

[...] #285878 0x00007a695e8f0adc in o_stream_default_cork (_stream=0xc8be5b27640, set=<optimized out>) at ostream.c:419 #285879 o_stream_default_cork (_stream=0xc8be5b27640, set=<optimized out>) at ostream.c:412 #285880 0x00000c8be506b72d in client_input (client=0xc8be5b07b00) at imap-client.c:945 #285881 0x00007a695e8e4867 in io_loop_call_io (io=0xc8be5b8f370) at ioloop.c:387 #285882 0x00007a695e8e5d1f in io_loop_handler_run (ioloop=ioloop@entry=0xc8be5ab50f0) at ioloop-epoll.c:220 #285883 0x00007a695e8e4178 in io_loop_run (ioloop=0xc8be5ab50f0) at ioloop.c:411 #285884 0x00007a695e87a847 in master_service_run (service=0xc8be5ab4f80, callback=callback@entry=0xc8be5077f20 ) at master-service.c:566 #285885 0x00000c8be50785d4 in main (argc=1, argv=0xc8be5ab4d50) at main.c:400

And gdb is killing by OOM. I suspect this can be related to imapc.

Regards, Marcin