vim-patch:9.0.0227: cannot read error message when abort() is called

Problem:    Cannot read error message when abort() is called.
Solution:   Output a newline before calling abort().
https://github.com/vim/vim/commit/213e70e284b0975dd34525e94e59e26811097c72

Add emsg_not_now() check to make code equivalent.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/nvim/message.c b/src/nvim/message.c
index 67b15e3e7d..684cf7207c 100644
--- a/src/nvim/message.c
+++ b/src/nvim/message.c
@@ -837,6 +837,8 @@ void iemsg(const char *s)
   emsg(s);
 #ifdef ABORT_ON_INTERNAL_ERROR
   set_vim_var_string(VV_ERRMSG, s, -1);
+  msg_putchar('\n');  // avoid overwriting the error message
+  ui_flush();
   abort();
 #endif
 }
@@ -846,11 +848,17 @@ void iemsg(const char *s)
 /// detected when fuzzing vim.
 void siemsg(const char *s, ...)
 {
+  if (emsg_not_now()) {
+    return;
+  }
+
   va_list ap;
   va_start(ap, s);
   (void)semsgv(s, ap);
   va_end(ap);
 #ifdef ABORT_ON_INTERNAL_ERROR
+  msg_putchar('\n');  // avoid overwriting the error message
+  ui_flush();
   abort();
 #endif
 }