Trying to start debugger on Windows for an Android project using a QtCreator (which is already using the "new" debug mechanism => QtCreator 4.6 onwards) i receive the message:
Investigating this issue further lead me to the method AndroidRunnerWorker::uploadFile() (in src\plugins\android\androidrunnerworker.cpp).
It specifically fails on the execution of the command
Debugging the call further showed the result message:
This happened to me on different machines and different projects and QtCreator versions (4.6+).
When running the mentioned command manually it expects the file contents of gdserver binary. Since the content comes from a QByteArray, maybe just an EOF is missing?