1 files changed, 2 insertions, 2 deletions

diff --git a/eval.c b/eval.c
index c1d544c6..c6f8bcb9 100644
--- a/eval.c
+++ b/eval.c
@@ -1171,7 +1171,7 @@ r_get_lhs(NODE *n, bool reference)
 		break;
 
 	default:
-		cant_happen();
+		cant_happen("unexpected variable type %s", nodetype2str(n->type));
 	}
 
 	if (do_lint && reference && var_uninitialized(n))
@@ -1345,7 +1345,7 @@ setup_frame(INSTRUCTION *pc)
 			break;
 
 		default:
-			cant_happen();
+			cant_happen("unexpected parameter type %s", nodetype2str(m->type));
 		}
 		r->vname = fp[i].param;
 	}