Rake not executing some tasks, gives "Invoke <task>s (first_time, not_needed)"

I posted a SO question about his issue here. Most of the background is there. Here's the gist:

I have a task called :run that takes one argument, :filter. Depending on what I pass as the argument, it will sometimes execute with the trace:

** Invoke run (first_time)
** Execute run

Other times it doesn't execute at all, giving the trace:

** Invoke runs (first_time, not_needed)

Notice that when it fails, the trace says runs and not run even though run is the task typed in the command.

This happens when I run the rakefile in some directories, but not others.

Using:

• ruby 2.0.0p645 (2015-04-13) [i386-mingw32]
• rake, version 10.4.2
• Window 7

Inizia dalla domanda collegata su Stack Overflow e riproduci il comportamento usando il Rakefile menzionato, il task :run e il relativo argomento :filter. Confronta le esecuzioni dalle directory in cui la trace differisce, concentrandoti sul motivo per cui la trace cambia da un’esecuzione all’altra e segnala not_needed. Il lavoro è completato quando il task viene eseguito in modo coerente con la trace prevista in queste directory.