libreoffice-7.2.0.4 and bison-3.8.1

Hi, I very much doubt this is actually a bison bug, but my guess is
that a change between 3.7.6 and 3.8.1 has triggered it and I don't
know where to look for pointers to what is wrong.

This is current LFS
https://www.linuxfromscratch.org/lfs/view/development/
and BLFS as at 16th September
https://www.linuxfromscratch.org/blfs/view/svn/

The errors start at
/scratch/working/libreoffice-7.2.0.4/workdir/YaccTarget/connectivity/source/parse/sqlbison.cxx: In function 'YYRESULTTAG yyuserAction(yyRuleNum, int, yyGLRStackItem*, yyGLRStack*, long int, YYSTYPE*)':
/scratch/working/libreoffice-7.2.0.4/workdir/YaccTarget/connectivity/source/parse/sqlbison.cxx:138:77: error: 'yyn' was not declared in this scope; did you mean 'yyk'?
  138 | #define SQL_NEW_RULE                    newNode("", SQLNodeType::Rule, yyr1[yyn])
      |                                                                             ^~~
/scratch/working/libreoffice-7.2.0.4/workdir/YaccTarget/connectivity/source/parse/sqlbison.cxx:5484:42: note: in expansion of macro 'SQL_NEW_RULE'
 5484 |                 ((*yyvalp).pParseNode) = SQL_NEW_RULE;
      |                                          ^~~~~~~~~~~~

and of course there is much more of the same.  Searching hasn't
found any similar error messages people have encountered.

ĸen
-- 
  I drew a gun. He drew a gun. I drew another gun. Soon we were
  surrounded by lovely drawings of guns.               -- Chic Murray