LSP: Unexpected header line at shutdown

LanguageClient haskell: Unexpected header line "ExitS"
LanguageClient haskell: Unexpected header line "ExitSuccess
"

qtc.languageclient.client: shutdown language server  "haskell"
qtc.languageclient.messages: StdIOClient send data:
qtc.languageclient.messages: Content-Length: 95

{"id":"{d62989d1-b35f-4935-b783-90c45cb86c9b}","jsonrpc":"2.0","method":"shutdown","params":{}}
qtc.languageclient.messages: StdIOClient std out:

qtc.languageclient.messages: Content-Length: 77

{"result":"ok","jsonrpc":"2.0","id":"{d62989d1-b35f-4935-b783-90c45cb86c9b}"}
qtc.languageclient.messages: StdIOClient send data:
qtc.languageclient.messages: Content-Length: 45

{"jsonrpc":"2.0","method":"exit","params":{}}
qtc.languageclient.client: language server  "haskell"  shutdown
qtc.languageclient.messages: StdIOClient std out:

qtc.languageclient.messages: ExitS
qtc.languageclient.messages: StdIOClient std out:

qtc.languageclient.messages: uccess

qtc.languageclient.messages: StdIOClient std err:

qtc.languageclient.messages: hie-wrapper: callProcess: /Users/ziller/.local/bin/hie "-r" "/Users/Shared/qt/creator/super/src/plugins/haskell/tests/manual/simple" (exit 1): failed