Set debug break slot at init of loop variable in a for loop.

src/full-codegen.cc

Index: src/full-codegen.cc
diff --git a/src/full-codegen.cc b/src/full-codegen.cc
index 5f3c1d2ceb949eba99f3b60c1c8dd50df216732c..00804dbead115a26f0e5ed6ff3df2c5061a1ca46 100644
--- a/src/full-codegen.cc
+++ b/src/full-codegen.cc
@@ -1160,6 +1160,7 @@ void FullCodeGenerator::VisitForStatement(ForStatement* stmt) {
 
   Iteration loop_statement(this, stmt);
   if (stmt->init() != NULL) {
+    SetStatementPosition(stmt);
     Visit(stmt->init());
   }
 
@@ -1173,8 +1174,8 @@ void FullCodeGenerator::VisitForStatement(ForStatement* stmt) {
 
   PrepareForBailoutForId(stmt->ContinueId(), NO_REGISTERS);
   __ bind(loop_statement.continue_label());
-  SetStatementPosition(stmt);
   if (stmt->next() != NULL) {
+    SetStatementPosition(stmt);

[Yang, 2012/03/07 18:28:36]

Only set a debug break slot if there is actually a statement.

     Visit(stmt->next());
   }