emberjs/ember.js · error · SyntaxError

Unclosed element `${poppedNode.tag}`

Error message

Unclosed element `${poppedNode.tag}`

What it means

Error "Unclosed element `${poppedNode.tag}`" thrown in emberjs/ember.js.

Source

Thrown at packages/@glimmer/syntax/lib/parser/handlebars-node-visitors.ts:106

      return node;
    }

    let poppedNode;

    try {
      this.elementStack.push(node);

      for (let child of program.body) {
        this.acceptNode(child);
      }
    } finally {
      poppedNode = this.elementStack.pop();
    }

    // Ensure that that the element stack is balanced properly.
    if (node !== poppedNode) {
      if (poppedNode?.type === 'ElementNode') {
        throw generateSyntaxError(`Unclosed element \`${poppedNode.tag}\``, poppedNode.loc);
      } else {
        // If the stack is not balanced, then it is likely our own bug, because
        // any unclosed Handlebars blocks should already been caught by now
        assert(poppedNode !== undefined, '[BUG] empty parser elementStack');
        assert(false, `[BUG] mismatched parser elementStack node: ${node.type}`);
      }
    }

    return node;
  }

  BlockStatement(block: HBS.UpstreamBlockStatement): ASTv1.BlockStatement | void {
    if (this.tokenizer.state === 'comment') {
      assert(block.loc, '[BUG] BlockStatement in parser unexpectedly did not have loc');
      this.appendToCommentData(this.sourceForNode(block as HBS.Node));
      return;
    }

View on GitHub (pinned to 26f97246a8)

When it happens

Trigger: Thrown at packages/@glimmer/syntax/lib/parser/handlebars-node-visitors.ts:106 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of emberjs/ember.js@26f97246a8 (2026-09-01). Data as JSON: /api/errors/36e50f2658f35889. Report an issue: GitHub.