Autumn theme breaks code wrapping

[SG420]

When using the autumn theme, long unbroken lines are not wrapped when the breaklines and breakanywhere options are set. This does not occur with other themes that I have tested.

For example:

\documentclass{article}
\usepackage{minted}
\usemintedstyle{autumn}

\begin{document}
\begin{minted}[autogobble, breaklines, breakanywhere]{http}
GET /search?query=this\%20is\%20a\%20very\%20long\%20search\%20string\%20with\%20lots\%20of\%20special\%20characters\%20like\%20percent\%20signs\%20\%20and\%20ampersands\%20&&&&&\%20and\%20more\%20special\%20characters\%20%%%%%\%20&&&&&\%20plus\%20some\%20more\%20text\%20to\%20make\%20this\%20even\%20longer\%20and\%20more\%20complex\%20%%%%%\%20&&&&&\%20because\%20we\%20need\%20it\%20to\%20be\%20very\%20long\%20for\%20this\%20example\%20%%%%%\%20&&&&&\%20now\%20let's\%20add\%20more\%20random\%20characters\%20%%%%%\%20&&&&&\%20to\%20make\%20sure\%20it's\%20really\%20long\%20and\%20has\%20enough\%20special\%20characters\%20%%%%%\%20&&&&&\%20keep\%20going\%20%%%%%\%20&&&&&\%20almost\%20there\%20%%%%%\%20&&&&&\%20just\%20a\%20bit\%20more\%20%%%%%\%20&&&&&\%20and\%20we\%20are\%20done\%20%%%%%\%20&&&&&\%20finally\%20%%%%%\%20&&&&&\%20 HTTP/1.0
Host: example.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
Upgrade-Insecure-Requests: 1
\end{minted}

\end{document}

Will result in the text going off the page:

When changing the style, e.g to colorful, the code will wrap as expected:

[muzimuzhi]

Pygments' autumn style uses underline attribute and its LaTeX formatter converts that attribute to LaTeX command \underline. It is \underline that prevented line breaking.

Unfortunately, it seems none of the two engine-neutral breakable underline commands (\uline and ul from ulem and soul packages, resp.) work for this case. Only the LuaTeX-only \underLine ("L" uppercased) from lua-ul package works.

An example which locally redefines \underline for minted environments and commands:

% !TeX TXS-program:compile = sh -c "TERM=xterm lualatex -shell-escape %.tex"
\documentclass{article}
\usepackage{minted}
\usemintedstyle{autumn}

\makeatletter
\minted@def@optfv{formatcom*}
\makeatother

\usepackage{lua-ul}          % for \underLine
%\usepackage{soul}           % for \ul
%\usepackage[normalem]{ulem} % for \uline

% "formatcom*=<code>" appends code, while "formatcom=<code>" overwrites
\setminted{formatcom*={\let\underline=\underLine}}

\begin{document}
\begin{minted}[autogobble, breaklines, breakanywhere]{http}
GET /search?query=this\%20is\%20a\%20very\%20long\%20search\%20string\%20with\%20lots\%20of\%20special\%20characters\%20like\%20percent\%20signs\%20\%20and\%20ampersands\%20&&&&&\%20and\%20more\%20special\%20characters\%20%%%%%\%20&&&&&\%20plus\%20some\%20more\%20text\%20to\%20make\%20this\%20even\%20longer\%20and\%20more\%20complex\%20%%%%%\%20&&&&&\%20because\%20we\%20need\%20it\%20to\%20be\%20very\%20long\%20for\%20this\%20example\%20%%%%%\%20&&&&&\%20now\%20let's\%20add\%20more\%20random\%20characters\%20%%%%%\%20&&&&&\%20to\%20make\%20sure\%20it's\%20really\%20long\%20and\%20has\%20enough\%20special\%20characters\%20%%%%%\%20&&&&&\%20keep\%20going\%20%%%%%\%20&&&&&\%20almost\%20there\%20%%%%%\%20&&&&&\%20just\%20a\%20bit\%20more\%20%%%%%\%20&&&&&\%20and\%20we\%20are\%20done\%20%%%%%\%20&&&&&\%20finally\%20%%%%%\%20&&&&&\%20 HTTP/1.0
Host: example.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
Upgrade-Insecure-Requests: 1
\end{minted}
\end{document}