GLR parsers sometimes raise parse errors instead of performing the

default reduction.
Reported by Charles-Henry de Boysson.
* tests/calc.at (_AT_CHECK_CALC, _AT_CHECK_CALC_ERROR): Don't
check the length of the	traces when %glr.
(_AT_CHECK_CALC_ERROR): Also skip `^Stack' lines, coming from
GLR's traces.
(AT_CHECK_CALC_LALR, AT_CHECK_CALC_GLR): New.
Test GLR parsers.
* data/glr.c (YYLEFTMOST_STATE): Fix its value.
(yyltype): Remove the yy prefix from the member names.
(yytable): Complete its comment.
(yygetLRActions): Map error action number from YYTABLE from
YYTABLE_NINF to 0.
(yyisErrorAction): No longer compare YYACTION to YYPACT_NINF
(which was a bug: it should have been YYTABEL_NINF, and yet it was
not satisfying as we could compare an YYACTION computed from
YYDEFACT to YYTABLE_NINF although they are unrelated): 0 is the
only value for error actions.
(yyreportParseError): In verbose parse error messages, don't issue
`error' in the list of expected tokens.
* data/yacc.c (yyparse) <yybackup>: Rewrite the decoding of the
next action to perform to match glr.c's decoding.
(yytable): Complete its comment.

THANKS

@@ -1,62 +1,63 @@
 Bison was originally written by Robert Corbett.  It would not be what
 it is today without the invaluable help of these people:
 
-Airy Andre		[email protected]
-Akim Demaille		[email protected]
-Albert Chin-A-Young	[email protected]
-Alexander Belopolsky	[email protected]
-Andreas Schwab		[email protected]
-Arnold Robbins		[email protected]
-Art Haas                [email protected]
-Benoit Perrot		[email protected]
-Bruce Lilly		[email protected]
-Cris Bailiff		[email protected]
-Cris van Pelt		[email protected]
-Daniel Hagerty		[email protected]
-David J. MacKenzie	djm@gnu.org
-Dick Streefland		[email protected]
-Enrico Scholz		enrico.s[email protected]
-Evgeny Stambulchik	[email protected]
-Fabrice Bauzac		[email protected]
-Florian Krohm		[email protected].com
-H. Merijn Brand		[email protected]
-Hans Aberg		[email protected]
-Jan Nieuwenhuizen       [email protected]
-Jesse Thilo		jthilo@gnu.org
-Jim Meyering		[email protected]
-Juan Manuel Guerrero	[email protected]
-Kees Zeelenberg		[email protected]
-Keith Browne		[email protected]
-Laurent Mascherpa	[email protected]
-Magnus Fromreide	[email protected]
-Marc Autret		[email protected]
-Martin Mokrejs          [email protected]
-Matt Kraai		[email protected]
-Michael Hayes		[email protected]
-Mike Castle		[email protected]
-Neil Booth		[email protected]
-Nelson H. F. Beebe	[email protected]
-Nicolas Burrus		[email protected]
-Nicolas Tisserand	nicolas.tisserand@epita.fr
-Noah Friedman		[email protected]
-Pascal Bart		[email protected]
-Paul Eggert		[email protected]
-Paul Hilfinger		[email protected]
-Per Allansson		[email protected]
-Peter Hámorský		[email protected]
-Piotr Gackiewicz	[email protected]
-R Blake			blakers@mac.com
-Raja R Harinath		[email protected]
-Richard Stallman	[email protected]
-Robert Anisko		[email protected]
-Shura			[email protected]
-Tim Josling		[email protected]u
-Tom Lane		[email protected]
-Tom Tromey		[email protected]
-Wayne Green		wayne@infosavvy.com
-Wolfram Wagner		[email protected]
-Wwp			[email protected]
-Zack Weinberg		[email protected]
+Airy Andre                [email protected]
+Akim Demaille             [email protected]
+Albert Chin-A-Young       [email protected]
+Alexander Belopolsky      [email protected]
+Andreas Schwab            [email protected]
+Arnold Robbins            [email protected]
+Art Haas                  [email protected]
+Benoit Perrot             [email protected]
+Bruce Lilly               [email protected]
+Charles-Henri de Boysson  [email protected]
+Cris Bailiff              [email protected]
+Cris van Pelt             [email protected]
+Daniel Hagerty            hag@gnu.org
+David J. MacKenzie        [email protected]
+Dick Streefland           dick.s[email protected]
+Enrico Scholz             [email protected]
+Evgeny Stambulchik        [email protected]
+Fabrice Bauzac            noon@cote-dazur.com
+Florian Krohm             [email protected]
+H. Merijn Brand           [email protected]
+Hans Aberg                [email protected]
+Jan Nieuwenhuizen         janneke@gnu.org
+Jesse Thilo               [email protected]
+Jim Meyering              [email protected]
+Juan Manuel Guerrero      [email protected]
+Kees Zeelenberg           [email protected]
+Keith Browne              [email protected]
+Laurent Mascherpa         [email protected]
+Magnus Fromreide          [email protected]
+Marc Autret               [email protected]
+Martin Mokrejs            [email protected]
+Matt Kraai                [email protected]
+Michael Hayes             [email protected]
+Mike Castle               [email protected]
+Neil Booth                [email protected]
+Nelson H. F. Beebe        [email protected]
+Nicolas Burrus            nicolas.burrus@epita.fr
+Nicolas Tisserand         [email protected]
+Noah Friedman             [email protected]
+Pascal Bart               [email protected]
+Paul Eggert               [email protected]
+Paul Hilfinger            [email protected]
+Per Allansson             [email protected]
+Peter Hámorský            [email protected]
+Piotr Gackiewicz          gacek@intertel.com.pl
+R Blake                   [email protected]
+Raja R Harinath           [email protected]
+Richard Stallman          [email protected]
+Robert Anisko             [email protected]
+Shura                     [email protected]u
+Tim Josling               [email protected]
+Tom Lane                  [email protected]
+Tom Tromey                tromey@cygnus.com
+Wayne Green               [email protected]
+Wolfram Wagner            [email protected]
+Wwp                       [email protected]
+Zack Weinberg             [email protected]
 
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