grep output is not in stdout or stderr

I'm trying to find files that contain 'ash' and 'bun' with the following bash command:

grep --line-buffered -ril ash | xargs -d '\n' grep -il bun

Output from the first grep only (the names of files containing 'ash') appears as expected on the terminal screen, but nothing is being printed to the pipe. I verified this with:

grep --line-buffered -ril ash &> junk

junk is empty.

I have GNOME Terminal 3.6.2, GNU grep 2.16 and Ubuntu 14.04. The output from grep is coloured.

I'm aware of grep's buffering quirks but the output appears on separate lines, so I assume it's being flushed.

Anybody?

4 Sorted by: Reset to default

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