go-vise

commit 4da080df88248875f8be0bb4ae44857d3fb0925c
parent 05504b3c7e83eb54a4387bfe2e379b77863daae2
Author: lash <dev@holbrook.no>
Date:   Thu,  5 Sep 2024 16:01:17 +0100

Stop endless catch recursion with panic :O

Diffstat:
M
state/state.go
 | 
8
+++++++-

1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/state/state.go b/state/state.go
@@ -273,10 +273,16 @@ func(st *State) Top() (bool, error) {
 // Clears mapping and sink.
 func(st *State) Down(input string) error {
 	var n uint16
-	if len(st.ExecPath) > MaxLevel {
+	l := len(st.ExecPath)
+	if l > MaxLevel {
 		panic("maxlevel")
 		return fmt.Errorf("max levels exceeded (%d)", n)
 	}
+	if l > 0 {
+		if st.ExecPath[l-1] == input {
+			panic("down into same node as previous")
+		}
+	}
 	st.ExecPath = append(st.ExecPath, input)
 	st.SizeIdx = 0
 	st.Moves += 1