Don't remove any entries from the pending deopts table before a throw.

runtime/vm/exceptions.cc

 // Copyright (c) 2011, 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/exceptions.h"
 
 #include "platform/address_sanitizer.h"
 
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 218 matching lines @@
       // Jump to the deopt stub instead of the catch handler.
       program_counter =
           StubCode::DeoptimizeLazyFromThrow_entry()->EntryPoint();
       if (FLAG_trace_deoptimization) {
         THR_Print("Throwing to frame scheduled for lazy deopt fp=%" Pp "\n",
                   frame_pointer);
       }
       break;
     }
   }
-  for (intptr_t i = pending_deopts->length() - 1; i >= 0; i--) {
-    // Leave the mapping at fp itself for use in DeoptimizeCopyFrame.
-    if ((*pending_deopts)[i].fp() < frame_pointer) {
-      pending_deopts->RemoveAt(i);
-    }
-  }
 #endif  // !DBC
 
 
 #if defined(USING_SIMULATOR)
   // Unwinding of the C++ frames and destroying of their stack resources is done
   // by the simulator, because the target stack_pointer is a simulated stack
   // pointer and not the C++ stack pointer.
 
   // Continue simulating at the given pc in the given frame after setting up the
   // exception object in the kExceptionObjectReg register and the stacktrace
@@ skipping 514 matching lines @@
   }
 
   return DartLibraryCalls::InstanceCreate(library,
                                           *class_name,
                                           *constructor_name,
                                           arguments);
 }
 
 
 }  // namespace dart