Check that Dart_CreateIsolate is given a correct kind of snapshot.

runtime/include/dart_api.h

 /*
  * 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.
  */
 
 #ifndef RUNTIME_INCLUDE_DART_API_H_
 #define RUNTIME_INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
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  * ========
  * Isolates
  * ========
  */
 
 /**
  * Creates a new isolate. The new isolate becomes the current isolate.
  *
  * A snapshot can be used to restore the VM quickly to a saved state
  * and is useful for fast startup. If snapshot data is provided, the
- * isolate will be started using that snapshot data.
+ * isolate will be started using that snapshot data. Requires a core snapshot or
+ * an app snapshot created by Dart_CreateSnapshot or
+ * Dart_CreatePrecompiledSnapshot* from a VM with the same version.
  *
  * Requires there to be no current isolate.
  *
  * \param script_uri The name of the script this isolate will load.
  *   Provided only for advisory purposes to improve debugging messages.
  * \param main The name of the main entry point this isolate will run.
  *   Provided only for advisory purposes to improve debugging messages.
  * \param snapshot A buffer containing a snapshot of the isolate or
  *   NULL if no snapshot is provided.
  * \param flags Pointer to VM specific flags or NULL for default flags.
@@ skipping 1920 matching lines @@
  *
  * \return A valid handle if no error occurs during the operation.
  */
 DART_EXPORT Dart_Handle Dart_LoadScript(Dart_Handle url,
                                         Dart_Handle resolved_url,
                                         Dart_Handle source,
                                         intptr_t line_offset,
                                         intptr_t col_offset);
 
 /**
- * Loads the root script for current isolate from a snapshot.
+ * Loads the root script for current isolate from a script snapshot. The
+ * snapshot must have been created by Dart_CreateScriptSnapshot from a VM with
+ * the same version.
  *
  * \param buffer A buffer which contains a snapshot of the script.
  * \param buffer_len Length of the passed in buffer.
  *
  * \return If no error occurs, the Library object corresponding to the root
  *   script is returned. Otherwise an error handle is returned.
  */
 DART_EXPORT Dart_Handle Dart_LoadScriptFromSnapshot(const uint8_t* buffer,
                                                     intptr_t buffer_len);
 
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 /**
  *  Returns whether the VM only supports running from precompiled snapshots and
  *  not from any other kind of snapshot or from source (that is, the VM was
  *  compiled with DART_PRECOMPILED_RUNTIME).
  */
 DART_EXPORT bool Dart_IsPrecompiledRuntime();
 
 #endif  /* INCLUDE_DART_API_H_ */  /* NOLINT */