Failures of new test standalone/io/regress_50904_test on android and weak asserts bots

[sstrickl]

There are new test failures on [io] Take pending writes into account in _SocketStreamConsumer.

The tests

standalone/io/regress_50904_test RuntimeError (expected Pass)

are failing on configurations

dartkp-weak-asserts-linux-release-x64
vm-aot-android-release-arm64c
vm-aot-android-release-arm_x64

On dartkp-weak-asserts-linux-release-x64:

...
--- Command "vm" (took 104ms):
DART_CONFIGURATION=ReleaseX64 TEST_COMPILATION_DIR=/b/s/w/ir/out/ReleaseX64/generated_compilations/dartkp-weak-asserts-linux-release-x64/tests_standalone_io_regress_50904_test out/ReleaseX64/dart_precompiled_runtime --enable_asserts --no-sound-null-safety -Dtest_runner.configuration=dartkp-weak-asserts-linux-release-x64 --ignore-unrecognized-flags --packages=/b/s/w/ir/.dart_tool/package_config.json /b/s/w/ir/out/ReleaseX64/generated_compilations/dartkp-weak-asserts-linux-release-x64/tests_standalone_io_regress_50904_test/out.aotsnapshot

exit code:
255

stdout:
stderr> VM initialization failed: Snapshot not compatible with the current VM configuration: the snapshot requires 'release no-code_comments no-dwarf_stack_traces_mode no-lazy_dispatchers no-dedup_instructions asserts x64 linux no-compressed-pointers no-null-safety' but the VM has 'release no-code_comments no-dwarf_stack_traces_mode no-lazy_dispatchers no-dedup_instructions no-asserts x64 linux no-compressed-pointers no-null-safety'

stderr:
Unhandled exception:
Expect.equals(expected: <0>, actual: <255>) fails.
#0      Expect._fail (package:expect/expect.dart:696)
#1      Expect.equals (package:expect/expect.dart:120)
#2      runTest (file:///b/s/w/ir/tests/standalone/io/regress_50904_test.dart:35)
<asynchronous suspension>

--- Re-run this test:
python3 tools/test.py -n dartkp-weak-asserts-linux-release-x64 standalone/io/regress_50904_test

On vm-aot-android-release-arm64c :

...
Executing adb -s HT7610205583 push /b/swarming/w/ir/out/ReleaseAndroidARM64C/generated_compilations/vm-aot-android-release-arm64c/tests_standalone_io_regress_50904_test/out.aotsnapshot /data/local/tmp/precompilation-testing/test/out.aotsnapshot
Stdout:
/b/swarming/w/ir/out/ReleaseAndroidARM64C/generated_compilations/vm-aot-android-release-arm64c/tests_standalone_io_regress_50904_test/out.aotsnapshot: 1 file pushed, 0 skipped. 2157.5 MB/s (1524640 bytes in 0.001s)
ExitCode: 0
Time: 0:00:00.232023

Executing adb -s HT7610205583 shell export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/data/local/tmp/precompilation-testing/test;/data/local/tmp/precompilation-testing/dart_precompiled_runtime --android-log-to-stderr --sound-null-safety -Dtest_runner.configuration=vm-aot-android-release-arm64c --ignore-unrecognized-flags --packages=/b/swarming/w/ir/.dart_tool/package_config.json /data/local/tmp/precompilation-testing/test/out.aotsnapshot ; echo AdbShellExitCode:  $?
Stdout:
AdbShellExitCode: 255
Stderr:
WARNING: linker: Warning: unable to normalize ""
WARNING: linker: /data/local/tmp/precompilation-testing/dart_precompiled_runtime: unsupported flags DT_FLAGS_1=0x8000001
Unhandled exception:
ProcessException: No such file or directory
  Command: /bin/sh -c '/data/local/tmp/precompilation-testing/dart_precompiled_runtime' '/data/local/tmp/precompilation-testing/test/out.aotsnapshot' 'receiver'
#0      _ProcessImpl._start (dart:io-patch/process_patch.dart:401)
#1      Process.start (dart:io-patch/process_patch.dart:38)
#2      runTest (file:///b/swarming/w/ir/tests/standalone/io/regress_50904_test.dart:20)
#3      main (file:///b/swarming/w/ir/tests/standalone/io/regress_50904_test.dart:60)
#4      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:294)
#5      _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:189)
ExitCode: 255
Time: 0:00:00.203945

--- Re-run this test:
python3 tools/test.py -n vm-aot-android-release-arm64c standalone/io/regress_50904_test

So these look like two different types of test infra failures, not related to the change per se. However, I can't find any recent bugs that have similar errors in the logs to add these two at the moment (unless I'm just not searching on the right details).

/cc @mraleph