Tables with mismatched headers don't render (but did in ancient marked 0.7.0?)

[gardnerjr]

Marked version:
4.x
Ancient code on marked 0.7.0 seems to handle this better

Describe the bug
A table with mismatched headers and rows won't render:

| One header |
|:------------- |:-------------|:-----|
| row | has | 3 cols |

We have a site using an ancient verison of marked, ~0.7.0, where this works in a strange way, which generates this:

<table>
<thead>
<tr>
<th style="text-align: left;">One header</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: left;">row</td>
<td style="text-align: left;">has</td>
<td style="text-align: left;">3 cols</td>
</tr>
</tbody>
</table>

To Reproduce
Steps to reproduce the behavior:

1. Marked broken example
   if you add a couple | to the first line to have matching number of columns, the table will start working
2. CommonMark, DaringFireball don't support tables

Expected behavior
The ancient behavior of creating a table with a partial header was much more forgiving. In this case, the second header line specifying the alignment is correct and i'd expect that to be the thing that "wins".

[gardnerjr]

Actually i tried with the other versions on the demo site, it looks like i have to go all the way back to 0.3.19 to get an example of it working like would be most forgiving

[calculuschild]

Yep, this is a result of Marked following the spec more closely in later versions. Ancient Marked mistakenly allowed bad table syntax. Newer Marked is better at following the rules.