Stop swallowing error messages.
TEST=Tested in the local engine build in Flutter that uses the new API.
Change-Id: I179366b8d5a251bcb00b5fea722e440c2745a1c7
Cq-Include-Trybots: luci.dart.try:pkg-linux-debug-try,pkg-linux-release-arm64-try,pkg-linux-release-try,pkg-mac-release-try,pkg-mac-release-arm64-try,pkg-win-release-try,vm-ffi-android-debug-arm-try,vm-aot-linux-debug-x64-try,vm-linux-debug-x64-try,vm-win-debug-x64-try,vm-mac-debug-x64-try,vm-mac-debug-arm64-try
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/389740
Auto-Submit: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Daco Harkes
2bba463f71