[debugger] fix liveedit in combination with step in.

src/compiler.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/compiler.h"
 
 #include <algorithm>
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 1144 matching lines @@
 void Compiler::CompileForLiveEdit(Handle<Script> script) {
   // TODO(635): support extensions.
   Zone zone;
   ParseInfo parse_info(&zone, script);
   CompilationInfo info(&parse_info);
   PostponeInterruptsScope postpone(info.isolate());
   VMState<COMPILER> state(info.isolate());
 
   // Get rid of old list of shared function infos.
   info.MarkAsFirstCompile();
+  info.MarkAsDebug();
   info.parse_info()->set_global();
   if (!Parser::ParseStatic(info.parse_info())) return;
 
   LiveEditFunctionTracker tracker(info.isolate(), parse_info.literal());
   if (!CompileUnoptimizedCode(&info)) return;
   if (info.has_shared_info()) {
     Handle<ScopeInfo> scope_info =
         ScopeInfo::Create(info.isolate(), info.zone(), info.scope());
     info.shared_info()->set_scope_info(*scope_info);
   }
@@ skipping 627 matching lines @@
 }
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate()).PrintProgram(literal()));
 }
 #endif
 }  // namespace internal
 }  // namespace v8