check that local register is not edited at the end of macro calls

* This was unsafe and could easily result in crashes, since teco_qreg_current
  would afterwards point to an already freed Q-Register.
* Since automatically editing another register or buffer is not easy to do right,
  we throw an error instead.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/qreg.c b/src/qreg.c
index cac2d12..17b4830 100644
--- a/src/qreg.c
+++ b/src/qreg.c
@@ -1160,6 +1160,12 @@ teco_ed_hook(teco_ed_hook_t type, GError **error)
 
 	if (!teco_qreg_execute(qreg, &locals, error))
 		goto error_add_frame;
+	if (teco_qreg_current && !teco_qreg_current->must_undo) {
+		/* currently editing local Q-Register */
+		teco_error_editinglocalqreg_set(error, teco_qreg_current->head.name.data,
+		                                teco_qreg_current->head.name.len);
+		goto error_add_frame;
+	}
 
 	return teco_expressions_discard_args(error) &&
 	       teco_expressions_brace_close(error);