websockets (https://github.com/aaugustin/websockets)
+ src/websockets/streams.py:52: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]
+ src/websockets/streams.py:75: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]
+ src/websockets/streams.py:97: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]
+ src/websockets/frames.py:173: error: Argument 1 to "parse" of "Close" has incompatible type "bytes | bytearray | memoryview[int]"; expected "bytes"  [arg-type]
+ src/websockets/frames.py:327: error: Argument 1 to "apply_mask" has incompatible type "bytes | bytearray | memoryview[int]"; expected "bytes"  [arg-type]
+ src/websockets/frames.py:329: error: Incompatible types in assignment (expression has type "bytes | bytearray | memoryview[int]", variable has type "bytes")  [assignment]
+ src/websockets/protocol.py:694: error: Argument 1 to "parse" of "Close" has incompatible type "bytes | bytearray | memoryview[int]"; expected "bytes"  [arg-type]
+ src/websockets/extensions/permessage_deflate.py:137: error: Incompatible types in assignment (expression has type "bytes | bytearray | memoryview[int]", variable has type "bytes")  [assignment]
+ src/websockets/extensions/permessage_deflate.py:194: error: Incompatible types in assignment (expression has type "memoryview[int]", variable has type "bytes")  [assignment]
+ src/websockets/asyncio/messages.py:228: error: Incompatible types in "yield" (actual type "bytes | bytearray | memoryview[int]", expected type "str | bytes")  [misc]
+ src/websockets/asyncio/messages.py:242: error: Incompatible types in "yield" (actual type "bytes | bytearray | memoryview[int]", expected type "str | bytes")  [misc]
+ src/websockets/asyncio/connection.py:467: error: Argument 1 to "send_text" of "Protocol" has incompatible type "bytes | memoryview[Any]"; expected "bytes"  [arg-type]
+ src/websockets/asyncio/connection.py:469: error: Argument 1 to "send_binary" of "Protocol" has incompatible type "bytes | memoryview[Any]"; expected "bytes"  [arg-type]
+ src/websockets/sync/messages.py:224: error: Incompatible types in "yield" (actual type "bytes | bytearray | memoryview[int]", expected type "str | bytes")  [misc]
+ src/websockets/sync/messages.py:235: error: Incompatible types in "yield" (actual type "bytes | bytearray | memoryview[int]", expected type "str | bytes")  [misc]
+ src/websockets/legacy/framing.py:117: error: Argument 3 to "Frame" has incompatible type "bytes | bytearray | memoryview[int]"; expected "bytes"  [arg-type]
+ src/websockets/sync/connection.py:431: error: Argument 1 to "send_text" of "Protocol" has incompatible type "bytes | memoryview[Any]"; expected "bytes"  [arg-type]
+ src/websockets/sync/connection.py:433: error: Argument 1 to "send_binary" of "Protocol" has incompatible type "bytes | memoryview[Any]"; expected "bytes"  [arg-type]
+ src/websockets/legacy/protocol.py:631: error: Argument 1 to "prepare_data" has incompatible type "str | bytes | memoryview[Any]"; expected "str | bytes"  [arg-type]

git-revise (https://github.com/mystor/git-revise)
+ gitrevise/utils.py:85: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]

operator (https://github.com/canonical/operator)
+ ops/pebble.py:3307: error: Argument 1 to "_next_part_boundary" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ ops/pebble.py:3323: error: Argument 1 has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ ops/pebble.py:3327: error: Argument 1 to "_next_part_boundary" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ ops/pebble.py:3331: error: Argument 1 to "__call__" of "_BodyHandler" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ ops/pebble.py:3338: error: Incompatible types in assignment (expression has type "bytearray", variable has type "bytes")  [assignment]

aioredis (https://github.com/aio-libs/aioredis)
+ aioredis/connection.py:952: error: Argument 1 to "append" of "list" has incompatible type "bytes | memoryview[int]"; expected "bytes"  [arg-type]
+ aioredis/connection.py:981: error: Subclass of "bytes" and "memoryview[Any]" cannot exist: "memoryview" is final  [unreachable]
+ aioredis/connection.py:987: error: Subclass of "bytes" and "memoryview[Any]" cannot exist: "memoryview" is final  [unreachable]
+ aioredis/client.py:1921: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:2160: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:2173: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:2608: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:2616: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:2621: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:2629: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:2666: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:2674: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]
+ aioredis/client.py:3176: error: Value of type variable "_KeyT" of "list_or_args" cannot be "Sequence[int] | str"  [type-var]

dd-trace-py (https://github.com/DataDog/dd-trace-py)
+ ddtrace/internal/test_visibility/coverage_lines.py:73: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]

bokeh (https://github.com/bokeh/bokeh)
+ src/bokeh/core/serialization.py: note: In member "_decode_bytes" of class "Deserializer":
+ src/bokeh/core/serialization.py:618:16: error: Incompatible return value type (got "bytes | memoryview[int]", expected "bytes")  [return-value]

streamlit (https://github.com/streamlit/streamlit)
+ lib/streamlit/string_util.py: note: In function "is_binary_string":
+ lib/streamlit/string_util.py:164:37: error: Argument 2 to "translate" of "bytes" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ lib/streamlit/runtime/caching/hashing.py: note: In member "_to_bytes" of class "_CacheFuncHasher":
+ lib/streamlit/runtime/caching/hashing.py:363:20: error: Incompatible return value type (got "Union[bytes, bytearray]", expected "bytes")  [return-value]
+ lib/streamlit/runtime/caching/hashing.py: note: At top level:

urllib3 (https://github.com/urllib3/urllib3)
+ src/urllib3/util/ssltransport.py:108: error: Argument 1 to "send" of "SSLTransport" has incompatible type "memoryview[int]"; expected "bytes"  [arg-type]
+ test/test_ssltransport.py:57: error: Non-overlapping equality check (left operand type: "bytearray", right operand type: "str | bytes")  [comparison-overlap]
+ test/test_ssltransport.py:548: error: Argument 1 to "sendall" of "SSLTransport" has incompatible type "bytearray"; expected "bytes"  [arg-type]

boostedblob (https://github.com/hauntsaninja/boostedblob)
+ boostedblob/write.py:67: error: Argument "data" to "Request" has incompatible type "Union[bytes, bytearray, memoryview[int]]"; expected "Union[Dict[str, Any], bytes, None]"  [arg-type]
+ boostedblob/write.py:88: error: Argument "data" to "Request" has incompatible type "Union[bytes, bytearray, memoryview[int]]"; expected "Union[Dict[str, Any], bytes, None]"  [arg-type]
+ boostedblob/write.py:411: error: Argument "data" to "Request" has incompatible type "Union[bytes, bytearray, memoryview[int]]"; expected "Union[Dict[str, Any], bytes, None]"  [arg-type]

mongo-python-driver (https://github.com/mongodb/mongo-python-driver)
+ pymongo/message.py:739: error: Argument 1 to "_inflate_bson" has incompatible type "memoryview[int]"; expected "bytes"  [arg-type]
+ pymongo/synchronous/network.py:331: error: Argument 1 to "decompress" has incompatible type "memoryview[int]"; expected "bytes"  [arg-type]
+ pymongo/synchronous/network.py:333: error: Incompatible types in assignment (expression has type "memoryview[int]", variable has type "bytes")  [assignment]
+ pymongo/asynchronous/network.py:333: error: Argument 1 to "decompress" has incompatible type "memoryview[int]"; expected "bytes"  [arg-type]
+ pymongo/asynchronous/network.py:335: error: Incompatible types in assignment (expression has type "memoryview[int]", variable has type "bytes")  [assignment]
+ pymongo/asynchronous/encryption.py:212: error: Incompatible types in assignment (expression has type "memoryview[int]", variable has type "bytes")  [assignment]

trio (https://github.com/python-trio/trio)
+ src/trio/_unix_pipes.py:130: error: Argument 1 of "send_all" is incompatible with supertype "SendStream"; supertype defines the argument type as "Union[bytes, bytearray, memoryview[int]]"  [override]
+ src/trio/_unix_pipes.py:130: note: This violates the Liskov substitution principle
+ src/trio/_unix_pipes.py:130: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#incompatible-overrides
+ src/trio/_highlevel_generic.py:122: error: Incompatible return value type (got "Union[bytes, bytearray]", expected "bytes")  [return-value]
+ src/trio/_tests/test_testing.py:423: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]
+ src/trio/_tests/test_ssl.py:266: error: Argument 1 of "send_all" is incompatible with supertype "SendStream"; supertype defines the argument type as "Union[bytes, bytearray, memoryview[int]]"  [override]
+ src/trio/_tests/test_ssl.py:266: note: This violates the Liskov substitution principle
+ src/trio/_tests/test_ssl.py:266: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#incompatible-overrides
+ src/trio/_tests/test_dtls.py:465: error: No overload variant of "sendto" of "SocketType" matches argument types "Sequence[int]", "tuple[str, int]"  [call-overload]
+ src/trio/_tests/test_dtls.py:465: note: Possible overload variants:
+ src/trio/_tests/test_dtls.py:465: note:     def sendto(self, Buffer, Union[tuple[object, ...], str, Buffer], /) -> Coroutine[Any, Any, int]
+ src/trio/_tests/test_dtls.py:465: note:     def sendto(self, Buffer, int, Union[tuple[object, ...], str, Buffer], /) -> Coroutine[Any, Any, int]
+ src/trio/_tests/test_dtls.py:497: error: Argument "payload" to "evolve" of "UDPPacket" has incompatible type "bytearray"; expected "bytes"  [arg-type]

aiortc (https://github.com/aiortc/aiortc)
+ src/aiortc/codecs/vpx.py:352: error: Argument 1 to "_packetize" of "Vp8Encoder" has incompatible type "bytearray"; expected "bytes"  [arg-type]

pwndbg (https://github.com/pwndbg/pwndbg)
+ pwndbg/aglib/kernel/__init__.py: note: In function "load_kconfig":
+ pwndbg/aglib/kernel/__init__.py:130: error: Argument 1 to "Kconfig" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/commands/spray.py: note: In function "spray":
+ pwndbg/commands/spray.py:71: error: Argument 1 to "unpack" of "Arch" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/commands/sigreturn.py: note: In function "sigreturn":
+ pwndbg/commands/sigreturn.py:90: error: Argument 1 to "unpack" of "Arch" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/commands/probeleak.py: note: In function "probeleak":
+ pwndbg/commands/probeleak.py:122: error: Argument 1 to "unpack" of "Arch" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/commands/ptmalloc2.py: note: In function "find_fake_fast":
+ pwndbg/commands/ptmalloc2.py:912: error: Argument 1 to "unpack_size" of "Arch" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/commands/ptmalloc2.py: note: In function "vis_heap_chunks":
+ pwndbg/commands/ptmalloc2.py:1121: error: Argument 1 to "unpack" of "Arch" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/commands/hexdump.py: note: In function "hexdump":
+ pwndbg/commands/hexdump.py:104: error: Argument 1 to "hexdump" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py: note: In function "read_buildversion":
+ pwndbg/aglib/godbg.py:249: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:250: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py: note: In function "get_go_version":
+ pwndbg/aglib/godbg.py:279: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py: note: In function "read_varint_str":
+ pwndbg/aglib/godbg.py:368: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]
+ pwndbg/aglib/godbg.py:375: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]
+ pwndbg/aglib/godbg.py: note: In function "read_type_name":
+ pwndbg/aglib/godbg.py:389: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:392: error: Incompatible return value type (got "bytearray", expected "bytes")  [return-value]
+ pwndbg/aglib/godbg.py: note: In function "_inner_decode_runtime_type":
+ pwndbg/aglib/godbg.py:543: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:625: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:626: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:676: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:681: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:683: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py: note: In member "dump" of class "BasicType":
+ pwndbg/aglib/godbg.py:733: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:736: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:738: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:744: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:756: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:757: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:761: error: Argument 1 to "load_int" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:763: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:768: error: Argument 1 to "load_float" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:771: error: Argument 1 to "load_float" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:772: error: Argument 1 to "load_float" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:781: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:782: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py: note: In member "dump" of class "SliceType":
+ pwndbg/aglib/godbg.py:837: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:838: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:845: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py: note: In member "dump" of class "PointerType":
+ pwndbg/aglib/godbg.py:874: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py: note: In member "dump" of class "MapType":
+ pwndbg/aglib/godbg.py:988: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ pwndbg/aglib/godbg.py:1022: error: Argument 1 to "load_uint" has incompatible type "bytearray"; expected "bytes"  [arg-type]

steam.py (https://github.com/Gobot1234/steam.py)
+ steam/app.py:246: error: Argument 1 to "verify_signature" has incompatible type "memoryview[int]"; expected "bytes"  [arg-type]
+ steam/state.py:2992: error: Argument 1 to "receive" of "SteamWebSocket" has incompatible type "bytearray"; expected "bytes"  [arg-type]

aiohttp (https://github.com/aio-libs/aiohttp)
+ aiohttp/http_writer.py:109:39: error: Argument 1 has incompatible type "bytes | bytearray | memoryview[int]"; expected "bytes"  [arg-type]
+ aiohttp/http_writer.py:114:25: error: Incompatible types in assignment (expression has type "memoryview[bytes]", variable has type "bytes | bytearray | memoryview[int]")  [assignment]
+ aiohttp/http_writer.py:117:51: error: Argument 1 to "compress" of "ZLibCompressor" has incompatible type "bytes | bytearray | memoryview[int]"; expected "bytes"  [arg-type]
+ aiohttp/http_writer.py:134:21: error: Argument 1 to "_writelines" of "StreamWriter" has incompatible type "tuple[bytes, bytes | bytearray | memoryview[int], bytes]"; expected "Iterable[bytes]"  [arg-type]
+ aiohttp/_websocket/writer.py:136:23: error: Incompatible types in assignment (expression has type "bytearray", variable has type "bytes")  [assignment]
+ aiohttp/_websocket/writer.py:137:34: error: Argument 2 has incompatible type "bytes"; expected "bytearray"  [arg-type]
+ aiohttp/web_response.py:584:16: error: Incompatible return value type (got "bytes | bytearray | Payload | None", expected "bytes | Payload | None")  [return-value]
+ aiohttp/web_response.py:657:53: error: Incompatible types in assignment (expression has type "bytes | bytearray | Payload | None", variable has type "bytes | Payload | None")  [assignment]
+ aiohttp/web_response.py:710:39: error: Argument 1 to "compress" of "ZLibCompressor" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ aiohttp/web_ws.py:605:27: error: Argument 1 of "write" is incompatible with supertype "StreamResponse"; supertype defines the argument type as "bytes | bytearray | memoryview[int]"  [override]
+ aiohttp/web_ws.py:605:27: note: This violates the Liskov substitution principle
+ aiohttp/web_ws.py:605:27: note: See https://mypy.readthedocs.io/en/stable/common_issues.html#incompatible-overrides
+ aiohttp/_websocket/reader_py.py:248:25: error: Argument 1 to "decompress_sync" of "ZLibDecompressor" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ aiohttp/_websocket/reader_py.py:312:40: error: Argument "data" to "WSMessagePing" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ aiohttp/_websocket/reader_py.py:316:40: error: Argument "data" to "WSMessagePong" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ aiohttp/_websocket/reader_c.py:248:25: error: Argument 1 to "decompress_sync" of "ZLibDecompressor" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ aiohttp/_websocket/reader_c.py:312:40: error: Argument "data" to "WSMessagePing" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ aiohttp/_websocket/reader_c.py:316:40: error: Argument "data" to "WSMessagePong" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]

python-chess (https://github.com/niklasf/python-chess)
+ chess/gaviota.py:1835: error: Incompatible types in assignment (expression has type "bytearray", variable has type "bytes")  [assignment]

mitmproxy (https://github.com/mitmproxy/mitmproxy)
+ mitmproxy/dns.py:362: error: Argument 1 to "unpack_from_with_compression" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ mitmproxy/dns.py:396: error: Argument 1 to "decompress_from_record_data" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ mitmproxy/dns.py:399: error: Argument 5 to "ResourceRecord" has incompatible type "bytes | bytearray"; expected "bytes"  [arg-type]
+ mitmproxy/proxy/layers/tls.py:565: error: Argument 1 to "dtls_parse_client_hello" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ mitmproxy/proxy/layers/tls.py:567: error: Argument 1 to "parse_client_hello" has incompatible type "bytearray"; expected "bytes"  [arg-type]

dulwich (https://github.com/dulwich/dulwich)
+ dulwich/config.py:383: error: Incompatible types in assignment (expression has type "bytearray", variable has type "bytes")  [assignment]

werkzeug (https://github.com/pallets/werkzeug)
+ src/werkzeug/sansio/multipart.py:174: error: Argument 1 to "_parse_headers" of "MultipartDecoder" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ src/werkzeug/sansio/multipart.py:213: error: Argument 1 to "_parse_data" of "MultipartDecoder" has incompatible type "bytearray"; expected "bytes"  [arg-type]
+ src/werkzeug/sansio/multipart.py:220: error: Argument 1 to "_parse_data" of "MultipartDecoder" has incompatible type "bytearray"; expected "bytes"  [arg-type]