xtask: Fix channel of cargo operations #466
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Starting in rustup 1.25.0, the environment is modified during `cargo` invocations in a way that breaks setting the channel arg (e.g. "+nightly") in a subprocess. Fix by unsetting those variables in the child cargo's env. See rust-lang/rustup#3031
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Starting in rustup 1.25.0, the environment is modified during
cargoinvocations in a way that breaks setting the channel arg
(e.g. "+nightly") in a subprocess.
Fix by unsetting those variables in the child cargo's env.
See rust-lang/rustup#3031