patch 8.1.0091: MS-Windows: Cannot interrupt gdb when program is running commit https://github.com/vim/vim/commit/4551c0a9fcdbdef52836d4852686d54b5e47fdaf Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jun 20 22:38:21 2018 +0200 patch 8.1.0091: MS-Windows: Cannot interrupt gdb when program is running Problem: MS-Windows: Cannot interrupt gdb when program is running. Solution: Add debugbreak() and use it in the terminal debugger. Respect 'modified' in a prompt buffer.

--- a/src/undo.c
+++ b/src/undo.c
@@ -3539,7 +3539,9 @@ bufIsChanged(buf_T *buf)
     int
 bufIsChangedNotTerm(buf_T *buf)
 {
-    return !bt_dontwrite(buf)
+    // In a "prompt" buffer we do respect 'modified', so that we can control
+    // closing the window by setting or resetting that option.
+    return (!bt_dontwrite(buf) || bt_prompt(buf))
 	&& (buf->b_changed || file_ff_differs(buf, TRUE));
 }