Could the debugger be reading from con? That's the equivalent of /dev/tty on Windows.

Upd: I can't replicate your result exactly, but the existence of con is definitely a problem. In my test in Linux, it also wrote to con, which it then read, which caused more output, which ...

In reply to Re: perl -d myprog autostarts - but only in one specific directory by ikegami
in thread perl -d myprog autostarts - but only in one specific directory by ibm1620

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