* 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  <akim@lrde.epita.fr>
+
+	* 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  <eggert@cs.ucla.edu>
 
 	* doc/bison.texinfo (Decl Summary): Don't mention yylloc twice.

THANKS

@@ -45,6 +45,7 @@ Martin Mokrejs            mmokrejs@natur.cuni.cz
 Matt Kraai                kraai@alumni.cmu.edu
 Matt Rosing               rosing@peakfive.com
 Michael Hayes             m.hayes@elec.canterbury.ac.nz
+Mickael Labau             labau_m@epita.fr
 Mike Castle               dalgoda@ix.netcom.com
 Neil Booth                NeilB@earthling.net
 Nelson H. F. Beebe        beebe@math.utah.edu

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. */