bench/good: enable --explain during "make test".

bench/good: added the known bug cutdown.mly.

bench/good/00KNOWN_FAILURES

 belloeil
+cutdown

bench/good/Makefile

@@ -51,7 +51,7 @@ test: clean $(RESULTS)
 	fi;								\
 	if test -e $*.expected; then					\
 	  if diff $@ $*.expected >& /dev/null; then			\
-	    if $(MENHIR) $$CMD >& $*.out; then				\
+	    if $(MENHIR) --explain $$CMD >& $*.out; then		\
 	      echo "[OK] $$FILES";					\
 	    else							\
 	      if ! grep $* 00KNOWN_FAILURES >& /dev/null; then (	\

bench/good/cutdown.expected

+%{ %}
+%start goal
+%token R_BRACKET
+%token NEW
+%token L_BRACKET
+%token <string> INTEGER_LITERAL
+%token EOF
+%token ASSIGN
+
+%type <unit> goal
+%%
+
+goal:
+| assignment EOF
+    { }
+
+primary:
+| INTEGER_LITERAL
+    { }
+| array_access
+    { }
+
+primary_not_name:
+| array_access
+    { }
+| NEW L_BRACKET expression R_BRACKET
+    { }
+
+array_access:
+| expression L_BRACKET primary_not_name R_BRACKET
+    { }
+
+expression:
+| primary
+    { }
+| assignment
+    { }
+
+assignment:
+| left_hand_side ASSIGN expression
+    { }
+
+left_hand_side:
+| primary_not_name
+    { }
+
+%%
+
+
+

bench/good/cutdown.mly

+/* Bug reported by Jan Midtgaard on 2012/09/25. */
+/* The bug manifests itself when --explain is provided. */
+/* Menhir says:
+Warning: one state has shift/reduce conflicts.
+Warning: one state has reduce/reduce conflicts.
+** Internal failure (Pager's theorem).
+** Tokens of interest: R_BRACKET
+** Goal state: 14
+*/
+%{ %}
+
+%token EOF
+%token NEW
+%token L_BRACKET R_BRACKET
+%token ASSIGN
+%token <string>INTEGER_LITERAL
+
+%start <unit> goal    /* the entry point */
+%%
+
+goal :  assignment EOF  { }
+;
+
+primary
+  :  INTEGER_LITERAL  { }
+  |  array_access     { }
+  ;
+
+primary_not_name
+  :  array_access                            { }
+  |  NEW L_BRACKET expression R_BRACKET  { }
+  ;
+
+array_access 
+  :  expression L_BRACKET primary_not_name R_BRACKET  { }
+
+expression
+  :  primary             { }
+  |  assignment          { }
+  ;
+
+assignment
+  :  left_hand_side ASSIGN expression { }
+  ;
+
+left_hand_side
+  :  primary_not_name  { }
+  ;