Newenvironment with "old" environment not working

[zorkow]

Example:

\newenvironment{boxed}
    {
    \begin{array}{|c|c|}\hline
    }
    {
    \\\hline
    \end{array} 
    }
\begin{boxed}a&b\\c&d\end{boxed}

Worked fine in 3.2.2, stopped working in 4.0.0-alpha.1.

[dpvc]

I suspect 9ed1360 is the commit that is the culprit, but need to look further

[dpvc]

The issue that commit fixed is described in #856.

[zorkow]

Thanks. Tested and lgtm. writes the reviewer confidently. That's because we did not have a complete set of tests!

[dpvc]

That's because we did not have a complete set of tests!

Yes, certainly. I know you are working on that, and I will, too.

I have made a PR to fix the problem. Sorry about the duplicate PRs, the first was opened as a draft, and I couldn't find where to change that, so resubmitted it.