Submitted upstream at https://github.com/Swordfish90/cool-retro-term/issues/692

--- a/qmltermwidget/lib/TerminalCharacterDecoder.cpp	1969-12-31 18:00:01.000000000 -0600
+++ b/qmltermwidget/lib/TerminalCharacterDecoder.cpp	2021-12-27 22:07:04.452256118 -0600
@@ -19,6 +19,8 @@
     02110-1301  USA.
 */
 
+#include <cwctype>
+
 // Own
 #include "TerminalCharacterDecoder.h"
 
ss='logo' rowspan='2'><a href='/'><img src='https://git.koszko.org/cgit-static/cgit.png' alt='cgit logo'/></a></td>
<td class='main'><a href='/'>index</a> : <a href='/guix/'>guix</a></td><td class='form'><form method='get'>
<input type='hidden' name='id' value='589c99e6f6ef17f30c541042768557a72706df47'/><select name='h' onchange='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=589c99e6f6ef17f30c541042768557a72706df47'>refs</a><a class='active' href='/guix/log/gnu/packages/shells.scm'>log</a><a href='/guix/tree/gnu/packages/shells.scm?id=589c99e6f6ef17f30c541042768557a72706df47'>tree</a><a href='/guix/commit/gnu/packages/shells.scm?id=589c99e6f6ef17f30c541042768557a72706df47'>commit</a><a href='/guix/diff/gnu/packages/shells.scm?id=589c99e6f6ef17f30c541042768557a72706df47'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/shells.scm'>
<input type='hidden' name='id' value='589c99e6f6ef17f30c541042768557a72706df47'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=589c99e6f6ef17f30c541042768557a72706df47'>root</a>/<a href='/guix/log/gnu?id=589c99e6f6ef17f30c541042768557a72706df47'>gnu</a>/<a href='/guix/log/gnu/packages?id=589c99e6f6ef17f30c541042768557a72706df47'>packages</a>/<a href='/guix/log/gnu/packages/shells.scm?id=589c99e6f6ef17f30c541042768557a72706df47'>shells.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/shells.scm?id=589c99e6f6ef17f30c541042768557a72706df47&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-02-02 18:13:29 +0100'>2022-02-02</span></td><td><a href='/guix/commit/gnu/packages/shells.scm?id=f89bd6949a4b9f02eb98d53079dc416537a9620d'>gnu: oil: Update to 0.9.7.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/shells.scm (oil): Update to 0.9.7.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Felix Gruber</td></tr>
<tr><td><span title='2022-01-23 17:19:07 +0100'>2022-01-23</span></td><td><a href='/guix/commit/gnu/packages/shells.scm?id=5b50e9634a83eb8627906c6cd6a80e0b68df9ebd'>gnu: nushell: Update to 0.43.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/shells.scm (nushell):
(rust-nu-ansi-term-0.43):
(rust-nu-cli-0.43):
(rust-nu-command-0.43):
(rust-nu-completion-0.43):
(rust-nu-data-0.43):
(rust-nu-engine-0.43):
(rust-nu-errors-0.43):
(rust-nu-parser-0.43):
(rust-nu-path-0.43):
(rust-nu-plugin-0.42):
(rust-nu-plugin-binaryview-0.42):
(rust-nu-plugin-chart-0.42):
(rust-nu-plugin-from-bson-0.43):
(rust-nu-plugin-inc-0.43):
(rust-nu-plugin-match-0.42):
(rust-nu-plugin-query-json-0.43):
(rust-nu-plugin-selector-0.43):
(rust-nu-plugin-textview-0.43):
(rust-nu-plugin-to-bson-0.42):
(rust-nu-plugin-to-sqlite-0.43):
(rust-nu-plugin-xpath-0.43):
(rust-nu-pretty-hex-0.42):
(rust-nu-protocol-0.43):
(rust-nu-serde-0.43):
(rust-nu-stream-0.43):
(rust-nu-table-0.43):
(rust-nu-test-support-0.43):
(rust-nu-value-ext-0.43): Update to 0.43.0.
</span></span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2022-01-17 11:47:09 -0500'>2022-01-17</span></td><td><a href='/guix/commit/gnu/packages/shells.scm?id=276f40fdc349d2ad62582b23ea55e061b689cfc0'>Merge branch 'version-1.4.0'</a><span class='msg-avail'>...<span class='msg-tooltip'>With resolved conflicts in:
	gnu/packages/gnome.scm
	gnu/packages/openstack.scm
	gnu/packages/python-xyz.scm
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-01-16 01:00:02 +0100'>2022-01-16</span></td><td><a href='/guix/commit/gnu/packages/shells.scm?id=487613deea9ccad60142a9494d43f5ec97089934'>gnu: oil: Use G-expressions.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/shells.scm (oil)[arguments]:
Rewrite as G-expressions.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-01-16 01:00:02 +0100'>2022-01-16</span></td><td><a href='/guix/commit/gnu/packages/shells.scm?id=a2350a16dd2d7e465e63224d0b6a3dc421ab238e'>gnu: oil: Update to 0.9.6.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/shells.scm (oil): Update to 0.9.6.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-01-10 11:47:03 -0500'>2022-01-10</span></td><td><a href='/guix/commit/gnu/packages/shells.scm?id=d90080db54a562cf393fd3659165a3b19621edd9'>gnu: rust: Use rust-1.57.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/rust.scm (rust-1.54): Make it a private variable.  Move
definition to...
(rust-1.57): ... here.
(rust-1.55, rust-1.56): Make private.
* gnu/packages/shells.scm (nushell)[rust]: Remove argument.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-01-09 16:53:29 +0100'>2022-01-09</span></td><td><a href='/guix/commit/gnu/packages/shells.scm?id=b40b6b0909e98babdcb8c087ff80f8ee929a3de8'>gnu: Add rust-bat-0.18.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/crates-io.scm (rust-bat-0.18): New variable.
* gnu/packages/shells.scm (rust-nu-plugin-textview-0.42)[arguments]&lt;#:cargo-inputs&gt;:
Use rust-bat-0.18 instead of bat.
</span></span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2021-12-29 17:18:47 +0100'>2021-12-29</span></td><td><a href='/guix/commit/gnu/packages/shells.scm?id=5933ebedf5cb407d69e797bb2291587e1abdbdf5'>gnu: nushell: Update to 0.42.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/shells.scm (nushell):
(rust-nu-ansi-term-0.42):
(rust-nu-cli-0.42):
(rust-nu-command-0.42):
(rust-nu-completion-0.42):
(rust-nu-data-0.42):
(rust-nu-engine-0.42):
(rust-nu-errors-0.42):
(rust-nu-json-0.42):
(rust-nu-parser-0.42):
(rust-nu-plugin-0.42):
(rust-nu-plugin-binaryview-0.42):
(rust-nu-plugin-from-bson-0.42):
(rust-nu-plugin-inc-0.42):
(rust-nu-plugin-query-json-0.42):
(rust-nu-plugin-s3-0.42):
(rust-nu-plugin-selector-0.42):
(rust-nu-plugin-textview-0.42):
(rust-nu-plugin-to-sqlite-0.42):
(rust-nu-plugin-xpath-0.42):
(rust-nu-protocol-0.42):
(rust-nu-serde-0.42):
(rust-nu-stream-0.42):
(rust-nu-table-0.42):
(rust-nu-test-support-0.42):
(rust-nu-value-ext-0.42): Update to 0.42.0.
</span></span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2021-12-28 14:10:25 -0500'>2021-12-28</span></td><td><a href='/guix/commit/gnu/packages/shells.scm