Improve the error messages for IndexOutOfRangeException.

runtime/lib/byte_array.dart

Index: runtime/lib/byte_array.dart
diff --git a/runtime/lib/byte_array.dart b/runtime/lib/byte_array.dart
index 2ef81e6dfe70951093de3a2dc940b29560cf4da9..a4a208073273307cbc9bc668c60d0f2ed2d25d15 100644
--- a/runtime/lib/byte_array.dart
+++ b/runtime/lib/byte_array.dart
@@ -2381,14 +2381,16 @@ class _Int8ArrayView extends _ByteArrayViewBase implements Int8List {
 
   int operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getInt8(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, int value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setInt8(_offset + (index * _BYTES_PER_ELEMENT), _toInt8(value));
   }
@@ -2451,14 +2453,16 @@ class _Uint8ArrayView extends _ByteArrayViewBase implements Uint8List {
 
   int operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getUint8(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, int value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setUint8(_offset + (index * _BYTES_PER_ELEMENT), _toUint8(value));
   }
@@ -2521,14 +2525,16 @@ class _Int16ArrayView extends _ByteArrayViewBase implements Int16List {
 
   int operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getInt16(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, int value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setInt16(_offset + (index * _BYTES_PER_ELEMENT), _toInt16(value));
   }
@@ -2591,14 +2597,16 @@ class _Uint16ArrayView extends _ByteArrayViewBase implements Uint16List {
 
   int operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getUint16(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, int value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setUint16(_offset + (index * _BYTES_PER_ELEMENT), _toUint16(value));
   }
@@ -2661,14 +2669,16 @@ class _Int32ArrayView extends _ByteArrayViewBase implements Int32List {
 
   int operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getInt32(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, int value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setInt32(_offset + (index * _BYTES_PER_ELEMENT), _toInt32(value));
   }
@@ -2731,14 +2741,16 @@ class _Uint32ArrayView extends _ByteArrayViewBase implements Uint32List {
 
   int operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getUint32(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, int value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setUint32(_offset + (index * _BYTES_PER_ELEMENT), _toUint32(value));
   }
@@ -2801,14 +2813,16 @@ class _Int64ArrayView extends _ByteArrayViewBase implements Int64List {
 
   int operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getInt64(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, int value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setInt64(_offset + (index * _BYTES_PER_ELEMENT), _toInt64(value));
   }
@@ -2871,14 +2885,16 @@ class _Uint64ArrayView extends _ByteArrayViewBase implements Uint64List {
 
   int operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getUint64(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, int value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setUint64(_offset + (index * _BYTES_PER_ELEMENT), _toUint64(value));
   }
@@ -2941,14 +2957,16 @@ class _Float32ArrayView extends _ByteArrayViewBase implements Float32List {
 
   double operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getFloat32(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, double value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setFloat32(_offset + (index * _BYTES_PER_ELEMENT), value);
   }
@@ -3011,14 +3029,16 @@ class _Float64ArrayView extends _ByteArrayViewBase implements Float64List {
 
   double operator[](int index) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     return _array.getFloat64(_offset + (index * _BYTES_PER_ELEMENT));
   }
 
   void operator[]=(int index, double value) {
     if (index < 0 || index >= _length) {
-      throw new IndexOutOfRangeException(index);
+      String message = "$index must be in the range [0..$_length)";
+      throw new IndexOutOfRangeException(message);
     }
     _array.setFloat64(_offset + (index * _BYTES_PER_ELEMENT), value);
   }