Emphasis and underscores in the middle of a word

[silentvick]

I'm using marked.js v.0.3.1 with default settings.
Seems it breaks with underscores in the middle of word if there is also emphasis block in the same paragraph.

For example, this:

just_a_few_underscores

becomes this

just_a_few_underscores

as expected.

But this:

just_a_few_underscores. And here is the _emphasis_.

becomes:
justa _few_underscores. And here is emphasis.

Output html:

<p>just<em>a_few_underscores. And here is _emphasis</em>.</p>

[javoire]

+1

[tylercollier]

+1

[santhosh-tekuri]

+1

[suzanshakya]

+1

[joshbruce]

Closing as covered by CommonMark compliance. See also #1106 and #1216