Only include cyclic dependencies in error

1 files changed, 6 insertions, 3 deletions

diff --git a/src/main/java/org/shedlang/compiler/typechecker/NamespaceDependencyLineariser.java b/src/main/java/org/shedlang/compiler/typechecker/NamespaceDependencyLineariser.java
index ac7c2853..1afeb258 100644
--- a/src/main/java/org/shedlang/compiler/typechecker/NamespaceDependencyLineariser.java
+++ b/src/main/java/org/shedlang/compiler/typechecker/NamespaceDependencyLineariser.java
@@ -30,11 +30,14 @@ public class NamespaceDependencyLineariser {
         var adder = new Object() {
             private void add(NamespaceName name) {
                 if (!seen.contains(name)) {
-                    var cycle = stack.contains(name);
+                    var cycleStartIndex = stack.indexOf(name);
                     stack.add(name);
 
-                    if (cycle) {
-                        throw new CircularNamespaceDependencyError(stack, Sources.NULL);
+                    if (cycleStartIndex != -1) {
+                        throw new CircularNamespaceDependencyError(
+                            stack.subList(cycleStartIndex, stack.size()),
+                            Sources.NULL
+                        );
                     }
 
                     var untypedNamespaceNode = nodesByName.get(name);