* src/scan-gram.l: Be robust to BRACED_CODE appearing before any

rule.
Reported by Mickael Labau.
* tests/input.at (Torturing the Scanner): Test it.

ChangeLog

@@ -1,3 +1,10 @@
+2006-04-03  Akim Demaille  <[email protected]>
+
+	* src/scan-gram.l: Be robust to BRACED_CODE appearing before any
+	rule.
+	Reported by Mickael Labau.
+	* tests/input.at (Torturing the Scanner): Test it.
+
 2006-03-16  Paul Eggert  <[email protected]>
 
 	* doc/bison.texinfo (Decl Summary): Don't mention yylloc twice.

THANKS

@@ -45,6 +45,7 @@ Martin Mokrejs            [email protected]
 Matt Kraai                [email protected]
 Matt Rosing               [email protected]
 Michael Hayes             [email protected]
+Mickael Labau             [email protected]
 Mike Castle               [email protected]
 Neil Booth                [email protected]
 Nelson H. F. Beebe        [email protected]

src/scan-gram.l

@@ -292,7 +292,7 @@ splice	 (\\[ \f\t\v]*\n)*
 
   /* Code in between braces.  */
   "{" {
-    if (current_rule->action)
+    if (current_rule && current_rule->action)
       grammar_midrule_action ();
     STRING_GROW;
     token_type = BRACED_CODE;

tests/input.at

@@ -204,6 +204,14 @@ AT_CHECK([bison input.y], [1], [],
 ]])
 
 
+AT_DATA([input.y], 
+[{}
+])
+AT_CHECK([bison input.y], [1], [],
+[[input.y:1.1-2: syntax error, unexpected {...}
+]])
+
+
 AT_DATA_GRAMMAR([input.y],
 [[%{
 /* This is seen in GCC: a %{ and %} in middle of a comment. */