fix: normalize acorn node

packages/@lwc/template-compiler/src/parser/expression-complex/html.ts

@@ -91,6 +91,20 @@ function acornNodeToSourceLocation(node: Node): SourceLocation {
  });
 }
 
+function normalize(node: any) {
+ if (typeof node === 'object' && node !== null) {
+ if (node.loc) {
+ node.location = acornNodeToSourceLocation(node);
+ }
+ delete node.loc;
+ delete node.range;
+ delete node.sourceFile;
+ Object.keys(node).forEach((key) => {
+ normalize(node[key]);
+ });
+ }
+}
+
 /**
  * This class extends `parse5`'s internal tokenizer.
  *
@@ -167,10 +181,13 @@ class TemplateHtmlTokenizer extends Tokenizer {
  ['expression must end with curly brace.']
  );
 
+ const normalized = structuredClone(estreeNode);
+ normalize(normalized);
+
  // Parsed expressions that are cached here will be later retrieved when the
  // LWC template AST is being constructed.
  this.parser.preparsedJsExpressions.set(expressionStart, {
- parsedExpression: estreeNode,
+ parsedExpression: normalized,
  rawText: expressionTextNodeValue,
  sourceLocation: acornNodeToSourceLocation(estreeNode),
  });

packages/@lwc/template-compiler/src/parser/index.ts

@@ -503,17 +503,7 @@ function parseText(ctx: ParserCtx, parse5Text: parse5Tools.TextNode): Text[] {
  throw new Error('Implementation error: cannot find preparsed template expression');
  }
 
- const { type, start, end, name } = entry.parsedExpression as any;
-
- const value = {
- type,
- start,
- end,
- name,
- location: ast.sourceLocation(location),
- };
-
- return [ast.text(rawText, value, location)];
+ return [ast.text(rawText, entry.parsedExpression, location)];
  }
 
  // Split the text node content arround expression and create node for each