Bug 1387355

Description of problem:
I encountered an error while building the flint package for Rawhide.  The following document is a stripped down version of the problem.  It builds without error and produces the expected output on Fedora 24 with texlive-2015-24.20150728_r37987.fc24:

\documentclass{article}
\usepackage{amsmath,amsthm,amscd,amsfonts,amssymb}
\begin{document}

    $$
    2 \max \left(
        \left|\frac{a_{n-1}}{a_n}\right|,
        \left|\frac{a_{n-2}}{a_n}\right|^{\frac{1}{2}}, \dots
        \left|\frac{a_1}{a_n}\right|^{\frac{1}{n-1}},
        \left|\frac{a_0}{2a_n}\right|^{\frac{1}{n}}
    \right)
    $$

\end{document}

With Rawhide, though, this happens:

$ pdflatex test.tex
This is pdfTeX, Version 3.14159265-2.6-1.40.17 (TeX Live 2016) (preloaded format=pdflatex)
 restricted \write18 enabled.
...
(/usr/share/texlive/texmf-dist/tex/latex/amsfonts/umsb.fd)
! Argument of \zap@to@space has an extra }.
<inserted text> 
                \par 
l.9         \left
                 |\frac{a_1}{a_n}\right|^{\frac{1}{n-1}},
? 

This appears to be a known problem with amsmath 2.15b (the version in Rawhide), which has been fixed in amsmath 2.15d.  Is an amsmath upgrade possible?

Version-Release number of selected component (if applicable):
texlive-amsmath-svn40218-13.fc26.1.noarch

How reproducible:
Always.

Steps to Reproduce:
1. Save the document text show above into a file, say dots.tex
2. Run pdflatex dots.tex in Rawhide

Actual results:
The error shown above.

Expected results:
Successful completion.

Additional info:
See version notes on 2.15d here: https://www.ctan.org/tex-archive/macros/latex/required/amsmath?lang=en