patch 8.0.1619: Win32 GUI: crash when winpty is not installed commit https://github.com/vim/vim/commit/81c3c89a28859de3aa167c53355f374394ada093 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 20 11:41:44 2018 +0100 patch 8.0.1619: Win32 GUI: crash when winpty is not installed Problem: Win32 GUI: crash when winpty is not installed and trying to use :shell in a terminal window. Solution: Check for NULL return form term_start(). (Yasuhiro Matsumoto, closes #2727)

--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -4824,6 +4824,8 @@ mch_call_shell_terminal(
     argvar[0].vval.v_string = newcmd;
     argvar[1].v_type = VAR_UNKNOWN;
     buf = term_start(argvar, NULL, &opt, TERM_START_SYSTEM);
+    if (buf == NULL)
+	return 255;
 
     /* Find a window to make "buf" curbuf. */
     aucmd_prepbuf(&aco, buf);