[debugger] fix --print-break-location for multiline scripts.

src/debug/debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/debug/debug.h"
 
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 2322 matching lines @@
   summary.function()->PrintName();
   PrintF("'.\n");
   if (script_obj->IsScript()) {
     Handle<Script> script = Handle<Script>::cast(script_obj);
     Handle<String> source(String::cast(script->source()));
     Script::InitLineEnds(script);
     int line = Script::GetLineNumber(script, source_position);
     int column = Script::GetColumnNumber(script, source_position);
     Handle<FixedArray> line_ends(FixedArray::cast(script->line_ends()));
     int line_start =
-        line == 0 ? 0 : Smi::cast(line_ends->get(line - 1))->value();
+        line == 0 ? 0 : Smi::cast(line_ends->get(line - 1))->value() + 1;
     int line_end = Smi::cast(line_ends->get(line))->value();
     DisallowHeapAllocation no_gc;
     String::FlatContent content = source->GetFlatContent();
     if (content.IsOneByte()) {
       PrintF("[debug] %.*s\n", line_end - line_start,
              content.ToOneByteVector().start() + line_start);
       PrintF("[debug] ");
       for (int i = 0; i < column; i++) PrintF(" ");
       PrintF("^\n");
     } else {
@@ skipping 305 matching lines @@
 }
 
 
 void LockingCommandMessageQueue::Clear() {
   base::LockGuard<base::Mutex> lock_guard(&mutex_);
   queue_.Clear();
 }
 
 }  // namespace internal
 }  // namespace v8