Shell.call fails in Shell_sys.Background mode.

Hello.

I stumbled on a weird behaviour:

Using Shell.call ~mode:Shell_sys.Background [Shell.cmd "ant" ["run"]] to 
launch a Java server serving some XML stuff, the command fails.

However, if I remove the Shell_sys.Background argument, and have it 
execute in the same group as the OCaml toploop, it works fine.

Is it me, or did such a thing happen to someone else before?

Guillaume Yziquel.

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