Fix for issue 192 in domokit/mojo

runtime/vm/raw_object_snapshot.cc

Index: runtime/vm/raw_object_snapshot.cc
diff --git a/runtime/vm/raw_object_snapshot.cc b/runtime/vm/raw_object_snapshot.cc
index fcb7b0a47669edeeab5055c027d7529d6bab092d..541e8a7500eec08fb7c4b76b7e6c2f4b53b8520d 100644
--- a/runtime/vm/raw_object_snapshot.cc
+++ b/runtime/vm/raw_object_snapshot.cc
@@ -1681,15 +1681,21 @@ void RawInstance::WriteTo(SnapshotWriter* writer,
 }
 
 
-RawMint* Mint::ReadFrom(SnapshotReader* reader,
-                        intptr_t object_id,
-                        intptr_t tags,
-                        Snapshot::Kind kind) {
+RawInteger* Mint::ReadFrom(SnapshotReader* reader,
+                           intptr_t object_id,
+                           intptr_t tags,
+                           Snapshot::Kind kind) {
   ASSERT(reader != NULL);
 
   // Read the 64 bit value for the object.
   int64_t value = reader->Read<int64_t>();
 
+  // Check if the value could potentially fit in a Smi in our current
+  // architecture, if so return the object as a Smi.
+  if (Smi::IsValid(value)) {
+    return Smi::New(static_cast<intptr_t>(value));
+  }
+
   // Create a Mint object or get canonical one if it is a canonical constant.
   Mint& mint = Mint::ZoneHandle(reader->zone(), Mint::null());
   if (kind == Snapshot::kFull) {