Clean up handling of %destructor for the end token (token 0).

[bison.git] / data / glr.c

diff --git a/data/glr.c b/data/glr.c
index 836df5032c72d646cea95dd866ca80b558d37aa5..7c3d998d29aadbf89b82638d1831a5f01d8d99dc 100644 (file)
--- a/data/glr.c
+++ b/data/glr.c
@@ -2261,7 +2261,8 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
            }
        }
 ]b4_locations_if([[      yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
-      yydestroyGLRState ("Error: popping", yys]b4_user_args[);
+      if (yys->yypred != NULL)
+       yydestroyGLRState ("Error: popping", yys]b4_user_args[);
       yystackp->yytops.yystates[0] = yys->yypred;
       yystackp->yynextFree -= 1;
       yystackp->yyspaceLeft += 1;
@@ -2373,8 +2374,7 @@ m4_popdef([b4_at_dollar])])dnl
              if (yyisShiftAction (yyaction))
                {
                  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
-                 if (yychar != YYEOF)
-                   yychar = YYEMPTY;
+                 yychar = YYEMPTY;
                  yyposn += 1;
                  yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc);
                  if (0 < yystack.yyerrState)
@@ -2490,7 +2490,7 @@ m4_popdef([b4_at_dollar])])dnl
   goto yyreturn;
 
  yyreturn:
-  if (yychar != YYEOF && yychar != YYEMPTY)
+  if (yychar != YYEMPTY)
     yydestruct ("Cleanup: discarding lookahead",
                YYTRANSLATE (yychar),
                &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
@@ -2512,7 +2512,8 @@ m4_popdef([b4_at_dollar])])dnl
                  {
                    yyGLRState *yys = yystates[yyk];
 ]b4_locations_if([[                yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
-)[                 yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
+)[                 if (yys->yypred != NULL)
+                     yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
                    yystates[yyk] = yys->yypred;
                    yystack.yynextFree -= 1;
                    yystack.yyspaceLeft += 1;