#243: curl + libssh2 segfault with SFTP

#243: curl + libssh2 segfault with SFTP
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 Reporter:  tony2001  |       Owner:
     Type:  defect    |      Status:  new
 Priority:  normal    |   Milestone:  1.4.0
Component:  SFTP      |     Version:  1.4.1
 Keywords:            |  Blocked By:
   Blocks:            |
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 curl is the last stable version from the cURL website (curl-7.26.0).
 libssh2 is a fresh Git checkout (libssh2-HEAD-499b22c).

 # curl -u user:password sftp://127.0.0.1

 Program received signal SIGSEGV, Segmentation fault.
 0x00007ffff62d858b in kex_method_diffie_hellman_group14_sha1_key_exchange
 (session=0x65ee60, key_state=0xb7) at kex.c:804
 804         key_state->state = libssh2_NB_state_idle;
 (gdb) bt
 #0  0x00007ffff62d858b in
 kex_method_diffie_hellman_group14_sha1_key_exchange (session=0x65ee60,
 key_state=0xb7) at kex.c:804
 #1  0x00007ffff62da721 in _libssh2_kex_exchange (session=0x65ee60,
 reexchange=0, key_state=0x66bb00) at kex.c:1759
 #2  0x00007ffff62e33c0 in session_startup (session=0x65ee60, sock=7) at
 session.c:718
 #3  0x00007ffff62e366d in libssh2_session_handshake (session=0x65ee60,
 sock=7) at session.c:796
 #4  0x00007ffff7ba0ff2 in ssh_statemach_act () from
 /tmp/libssh/lib64/libcurl.so.4