Comparing the ABI of binaries between vte291-0.39.1-1.fc22.x86_64.rpm and vte291-0.39.90-1.fc22.x86_64.rpm:

================ changes of 'libvte-2.91.so.0.3901.0'===============
  Functions changes summary: 0 Removed, 0 Changed (81 filtered out), 3 Added functions
  Variables changes summary: 0 Removed, 0 Changed, 0 Added variable

  3 Added functions:

    [A] 'function const char* vte_get_features()'    {vte_get_features}
    [A] 'function const char* vte_terminal_get_word_char_exceptions(VteTerminal*)'    {vte_terminal_get_word_char_exceptions}
    [A] 'function void vte_terminal_set_word_char_exceptions(VteTerminal*, const char*)'    {vte_terminal_set_word_char_exceptions}

================ end of changes of 'libvte-2.91.so.0.3901.0'===============

================ changes of 'gnome-pty-helper'===============
  Functions changes summary: 0 Removed, 0 Changed, 0 Added function
  Variables changes summary: 0 Removed, 0 Changed, 0 Added variable
  Function symbols changes summary: 0 Removed, 0 Added function symbol not referenced by debug info
  Variable symbols changes summary: 0 Removed, 1 Added variable symbol not referenced by debug info

  1 Added variable symbol not referenced by debug info:

    [A] stderr

================ end of changes of 'gnome-pty-helper'===============