Protect getPathFromRoot when a child appears multiple times in a co…

…llection

CHANGELOG.md

@@ -2,6 +2,11 @@
 All notable changes to this project from version 1.2.0 upwards are documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [1.6.18] – 2024-03-21
+
+### Fixed
+- Protect `getPathFromRoot` when a child appears multiple times in a collection
+
 ## [1.6.17] – 2024-03-21
 
 ### Changed

package.json

@@ -3,7 +3,7 @@
 	"description": "AST building blocks for TypeScript/JavaScript, part of the *lasu family, with optional integrations with ANTLR4 and Ecore.",
 	"author": "Strumenta s.r.l.",
 	"publisher": "strumenta",
-	"version": "1.6.17",
+	"version": "1.6.18",
 	"license": "Apache-2.0",
 	"keywords": [
 		"antlr",

src/trace/trace-node.ts

@@ -242,12 +242,18 @@ export class TraceNode extends Node implements PossiblyNamed {
             path.push(ft.name.toString());
             if (ft.multiple) {
                 const children = this.parent.getChildren(ft.name);
+                let found = false;
                 for (let index = 0; index < children.length; index++) {
                     const child = children[index];
-                    if (child instanceof TraceNode && child.equals(this)) {
+                    if (child.equals(this)) {
                         path.push(index);
+                        found = true;
+                        break;
                     }
                 }
+                if (!found) {
+                    throw new Error(`Child node ${this} not found in ${ft.name.toString()}`);
+                }
             }
             return path;
         } else {