NRE in encoders #89931
Description
Description
Certain byte sequences causes certain encoders to throw NREs instead of overflow exceptions.
Reproduction Steps
using System;
using System.Text;
var str = "😀";
var encoding = Encoding.Unicode;
var bytes = encoding.GetBytes(str);
var decoder = encoding.GetDecoder();
var chars = new char[0];
decoder.Convert(bytes.AsSpan(), chars.AsSpan(), true, out _, out _, out var completed);Expected behavior
Expecting the same exception as something like this gives:
var str = "件";
...Actual behavior
Unhandled exception. System.NullReferenceException: Object reference not set to an instance of an object.
at System.Text.UnicodeEncoding.GetChars(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, DecoderNLS baseDecoder)
at System.Text.DecoderNLS.Convert(Byte* bytes, Int32 byteCount, Char* chars, Int32 charCount, Boolean flush, Int32& bytesUsed, Int32& charsUsed, Boolean& completed)
at System.Text.Decoder.Convert(ReadOnlySpan`1 bytes, Span`1 chars, Boolean flush, Int32& bytesUsed, Int32& charsUsed, Boolean& completed)
Regression?
No response
Known Workarounds
No response
Configuration
macOS Ventura, 8.0 preview 7
Other information
UTF32 shares the same issue, throwing an NRE, UTF8 is working correctly.