The UTF-8 decoder processes the input bytes in chunks of 1024 bytes. It
had the assumption that processing a chunk can at most yield 1024 UTF-16
code units. But the previous chunk may have had an uninished unicode
point that will (when finished in the next chunk) need to be encoded as
2 UTF-16 code units.
So decoding a 1024 byte chunk may yield 1025 UTF-16 code units.
=> Ensure the fixed buffer can hold 1025 UTF-16 code units.
Closes https://github.com/flutter/flutter/issues/180942
Change-Id: I53bb5b96647d84205153c0df6d468f2e77acef41
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/475042
Reviewed-by: Ömer Ağacan <omersa@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
Martin Kustermann
2dabb7225e