Make sure Bigint._digits is always a Uint32List (instead of sometimes null).

runtime/vm/method_recognizer.h

 // Copyright (c) 2014, 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 VM_METHOD_RECOGNIZER_H_
 #define VM_METHOD_RECOGNIZER_H_
 
 #include "vm/allocation.h"
 
 namespace dart {
@@ skipping 135 matching lines @@
   V(_Bigint, get:_used, Bigint_getUsed, 1308529543)                            \
   V(_Bigint, get:_digits, Bigint_getDigits, 1408062672)                        \
 
 // List of intrinsics:
 // (class-name, function-name, intrinsification method, fingerprint).
 #define CORE_LIB_INTRINSIC_LIST(V)                                             \
   V(_Smi, ~, Smi_bitNegate, 105519892)                                         \
   V(_Smi, get:bitLength, Smi_bitLength, 869956497)                             \
   V(_Bigint, set:_neg, Bigint_setNeg, 920204960)                               \
   V(_Bigint, set:_used, Bigint_setUsed, 1857576743)                            \
-  V(_Bigint, set:_digits, Bigint_setDigits, 1633805112)                        \
+  V(_Bigint, _set_digits, Bigint_setDigits, 582835804)                         \
   V(_Double, >, Double_greaterThan, 381325711)                                 \
   V(_Double, >=, Double_greaterEqualThan, 1409267140)                          \
   V(_Double, <, Double_lessThan, 2080387973)                                   \
   V(_Double, <=, Double_lessEqualThan, 106225572)                              \
   V(_Double, ==, Double_equal, 2093918133)                                     \
   V(_Double, +, Double_add, 1646350451)                                        \
   V(_Double, -, Double_sub, 1477459276)                                        \
   V(_Double, *, Double_mul, 1334580777)                                        \
   V(_Double, /, Double_div, 1938037155)                                        \
   V(_Double, get:isNaN, Double_getIsNaN, 843050033)                            \
@@ skipping 243 matching lines @@
   static Kind RecognizeKind(const Function& function);
   static bool AlwaysInline(const Function& function);
   static bool PolymorphicTarget(const Function& function);
   static const char* KindToCString(Kind kind);
   static void InitializeState();
 };
 
 }  // namespace dart
 
 #endif  // VM_METHOD_RECOGNIZER_H_