Throw if there is no compiler context available

pkg/front_end/lib/src/fasta/fasta_codes_generated.dart

 // Copyright (c) 2017, 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.
 
 // NOTE: THIS FILE IS GENERATED. DO NOT EDIT.
 //
 // Instead modify 'pkg/front_end/messages.yaml' and run
 // 'pkg/front_end/tool/_fasta/generate_messages.dart' to update.
 
 part of fasta.codes;
@@ skipping 1368 matching lines @@
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeInternalProblemExtendingUnmodifiableScope =
     messageInternalProblemExtendingUnmodifiableScope;
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const MessageCode messageInternalProblemExtendingUnmodifiableScope =
     const MessageCode("InternalProblemExtendingUnmodifiableScope",
         message: r"""Can't extend an unmodifiable scope.""");
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const Code<Null> codeInternalProblemMissingContext =
+    messageInternalProblemMissingContext;
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
+const MessageCode messageInternalProblemMissingContext = const MessageCode(
+    "InternalProblemMissingContext",
+    message: r"""Compiler cannot run without a compiler context.""",
+    tip: r"""Wrap calls to the compiler in a zone with a compiler context.""");
+
+// DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Template<Message Function(String name)> templateInternalProblemNotFound =
     const Template<Message Function(String name)>(
         messageTemplate: r"""Couldn't find '#name'.""",
         withArguments: _withArgumentsInternalProblemNotFound);
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Message Function(String name)> codeInternalProblemNotFound =
     const Code<Message Function(String name)>(
   "InternalProblemNotFound",
   templateInternalProblemNotFound,
@@ skipping 1503 matching lines @@
         r"""'yield' can't be used as an identifier in 'async', 'async*', or 'sync*' methods.""");
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const Code<Null> codeYieldNotGenerator = messageYieldNotGenerator;
 
 // DO NOT EDIT. THIS FILE IS GENERATED. SEE TOP OF FILE.
 const MessageCode messageYieldNotGenerator = const MessageCode(
     "YieldNotGenerator",
     dart2jsCode: "*ignored*",
     message: r"""'yield' can only be used in 'sync*' or 'async*' methods.""");