I have the same problem. I found that in dmesg, there were several lines about mosh-server crashing by segfault, for example:
[ 2980.423340] mosh-server[7104]: segfault at 0 ip (null) sp bfd4bb6c error 14 in mosh-server[80001000+58000] Here's some info from running mosh-server in GDB. I don't have debugging symbols though. I'm on i386 unstable. (gdb) c Continuing. mosh-server (mosh 1.2.5) [build mosh 1.2.5] Copyright 2012 Keith Winstein <mosh-de...@mit.edu> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html >. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. [mosh-server detached, pid = 7803] [New process 7817] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/i386-linux-gnu/i686/cmov/libthread_db.so.1". Reading symbols from /usr/lib/debug/.build-id/c6/7504492553f5afa0f618b16c92503a945af3ea.debug...done. Reading symbols from /usr/lib/debug/.build-id/af/a2e42e2dbf1580b3978c0810f5f4e930f3a24e.debug...done. Reading symbols from /usr/lib/debug/.build-id/7b/6848177dab9b5cd74f85e7dfa158bed12f5e3e.debug...done. Reading symbols from /usr/lib/debug/.build-id/25/b9bceb62bd6179ae5ad4bbbd9a8e612ce4189a.debug...done. Program received signal SIGSEGV, Segmentation fault. 0x00000000 in ?? () (gdb) bt #0 0x00000000 in ?? () #1 0xb7be786c in ?? () from /usr/lib/i386-linux-gnu/libutempter.so.0 #2 0xb7be79d3 in utempter_add_record () from /usr/lib/i386-linux-gnu/libutempter.so.0 #3 0x80006d59 in main () (gdb) info share >From To Syms Read Shared Object Library 0xb7fa4240 0xb7fb03a4 Yes (*) /lib/i386-linux-gnu/libtinfo.so.5 0xb7ec1910 0xb7f60784 Yes (*) /usr/lib/i386-linux-gnu/libprotobuf.so.9 0xb7e62890 0xb7e70241 Yes /lib/i386-linux-gnu/i686/cmov/libpthread.so.0 0xb7e04f70 0xb7e487b4 Yes (*) /usr/lib/i386-linux-gnu/i686/cmov/libssl.so.1.0.2 0xb7c51a40 0xb7d7a6b4 Yes (*) /usr/lib/i386-linux-gnu/i686/cmov/libcrypto.so.1.0.2 0xb7c08a30 0xb7c09326 Yes /lib/i386-linux-gnu/i686/cmov/libutil.so.1 0xb7bec8f0 0xb7bfd122 Yes (*) /lib/i386-linux-gnu/libz.so.1 0xb7be76c0 0xb7be7b64 Yes (*) /usr/lib/i386-linux-gnu/libutempter.so.0 0xb7ae3290 0xb7b90de4 Yes (*) /usr/lib/i386-linux-gnu/libstdc++.so.6 0xb7a2d5a0 0xb7a5ec5f Yes /lib/i386-linux-gnu/i686/cmov/libm.so.6 0xb7a0e080 0xb7a237d5 Yes (*) /lib/i386-linux-gnu/libgcc_s.so.1 0xb786b600 0xb7997fbd Yes /lib/i386-linux-gnu/i686/cmov/libc.so.6 0xb7fdc830 0xb7ff4930 Yes /lib/ld-linux.so.2 0xb784ea30 0xb784f961 Yes /lib/i386-linux-gnu/i686/cmov/libdl.so.2 0xb7fcce00 0xb7fd1613 Yes /lib/i386-linux-gnu/i686/cmov/libnss_compat.so.2 0xb7690110 0xb769bd11 Yes /lib/i386-linux-gnu/i686/cmov/libnsl.so.1 0xb7681960 0xb7687c50 Yes /lib/i386-linux-gnu/i686/cmov/libnss_nis.so.2 0xb766ea50 0xb76749c2 Yes /lib/i386-linux-gnu/i686/cmov/libnss_files.so.2 (*): Shared library is missing debugging information.
