Try/catch in graph builder.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 5475 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* PcDescriptors::KindAsStr(intptr_t index) const {
   switch (DescriptorKind(index)) {
     case PcDescriptors::kDeopt: return "deopt";
     case PcDescriptors::kPatchCode: return "patch";
     case PcDescriptors::kIcCall: return "ic-call";
-    case PcDescriptors::kFuncCall: return "func-call";
+    case PcDescriptors::kFuncCall: return "fn-call";
     case PcDescriptors::kReturn: return "return";
-    case PcDescriptors::kTypeTest: return "type-test";
+    case PcDescriptors::kTypeTest: return "ty-test";
     case PcDescriptors::kOther: return "other";
   }
   UNREACHABLE();
   return "";
 }
 
 
 const char* PcDescriptors::ToCString() const {
   if (Length() == 0) {
     return "No pc descriptors\n";
   }
-  const char* kFormat = "0x%x, %s %ld %ld, %ld\n";
+  const char* kFormat = "0x%x\t%s\t%ld\t%ld\t%ld\n";
   // First compute the buffer size required.
   intptr_t len = 0;
   for (intptr_t i = 0; i < Length(); i++) {
     len += OS::SNPrint(NULL, 0, kFormat,
         PC(i), KindAsStr(i), NodeId(i), TryIndex(i), TokenIndex(i));
   }
   // Allocate the buffer.
   char* buffer = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   // Layout the fields in the buffer.
@@ skipping 3609 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart