• VSCode Version: 1.19.0 (1.19.0)
• OS Version: macOS High Sierra 10.13.1 (17B1003)
• Reproduces without extensions: Yes

Steps to Reproduce:

1. In your vscode preferences, enter this setup:

"emmet.preferences": {
        "filter.commentAfter": "<!-- /[#ID][.CLASS] -->"
    }

2. In a html file, using the Emmet "Wrap with abbreviation" enter something like ".container|c".

3. You should get an error saying "Failed to expand abbreviation".

It works beautifully when I simply add elements without the "Wrap with abbreviation", for example ".container|c" outputs:

<div class="container"></div><!-- /.container -->

"Wrap with abbreviation" also works fine without the "|c".

Thanks in advance !