patch 8.0.1467: libvterm doesn't handle illegal byte sequence correctly commit https://github.com/vim/vim/commit/fef4ddd5eb8816a6607a624aa401bcfa71a63def Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 4 14:49:57 2018 +0100 patch 8.0.1467: libvterm doesn't handle illegal byte sequence correctly Problem: Libvterm doesn't handle illegal byte sequence correctly. Solution: After the invalid code check if there is space to store another character. Allocate one more character. (zhykzhykzhyk, closes #2614, closes #2613)

--- a/src/libvterm/src/state.c
+++ b/src/libvterm/src/state.c
@@ -248,8 +248,9 @@ static int on_text(const char bytes[], s
 
   VTermPos oldpos = state->pos;
 
-  /* We'll have at most len codepoints */
-  codepoints = vterm_allocator_malloc(state->vt, len * sizeof(uint32_t));
+  /* We'll have at most len codepoints, plus one from a previous incomplete
+   * sequence. */
+  codepoints = vterm_allocator_malloc(state->vt, (len + 1) * sizeof(uint32_t));
 
   encoding =
     state->gsingle_set     ? &state->encoding[state->gsingle_set] :