[Grep-devel] look ahead capture content :(

[Marc Chantreux]

hello people,

I would like to use grep instead of sed in this particular context

    sed 's/^Channel \+//;t;d' <<\.
    Channel foo
    Rocket  bang
    Channel bar
    .

the result is

    foo
    bar

i expected the same result with

    grep -Po '(?=^Channel +).*' <<\.
    Channel foo
    Rocket  bang
    Channel bar
    .

but instead, i got

    Channel foo
    Channel bar

is there a bug? a misuse of mine ?

regards
marc