Taken from Debian:
https://salsa.debian.org/multimedia-team/taopm/-/raw/master/debian/patches/02-fix-parser-yyerror.diff

Description: Use a constant char, dummy comment.
Author: Tiago Bortoletto Vaz <tiago@debian.org>
Last-Update: 2013-04-17
--- a/taoparse/taoparser.yy
+++ b/taoparse/taoparser.yy
@@ -23,7 +23,7 @@
 #include <stdio.h>
 #include "taoparserdefs.h"
 
-int yyerror(char *s);
+int yyerror(const char *s);
 
 //#ifdef LINUX
 int yylex(void);
@@ -2924,7 +2924,7 @@
     } 
 
 
-int yyerror (char *s)
+int yyerror (const char *s)
     {
     parse_error(what_I_expected_here);
     std::cout << "PARSE_FAILED";
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<tr><td><span title='2021-03-02 23:33:58 +0800'>2021-03-02</span></td><td><a href='/tracifyjs/commit/test/compress/varify.js?h=templatifyjs&amp;id=adcafce04852bb4730e3e699dfdd656dc018cd0f'>fix corner cases in `varify` (#4719)</a></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2021-03-02 15:27:55 +0800'>2021-03-02</span></td><td><a href='/tracifyjs/commit/test/compress/varify.js?h=templatifyjs&amp;id=74dee5c445b1424866ef78ac9b06c507ef92959c'>enhance `reduce_vars` &amp; `varify` (#4714)</a></td><td>Alex Lam S.L</td></tr>
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<tr><td><span title='2020-11-18 08:22:54 +0800'>2020-11-18</span></td><td><a href='/tracifyjs/commit/test/compress/varify.js?h=templatifyjs&amp;id=0bedd031da4fa8f0eef0fbe6737aa3a4c156a61e'>fix corner cases in `collapse_vars`, `unused` &amp; `varify` (#4292)</a><span class='msg-avail'>...<span class='msg-tooltip'>fixes #4290</span></span></td><td>Alex Lam S.L</td></tr>
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