sccache v0.2.13 fails when `-Z unstable-options` are specified

mozilla / sccache

Sccache is a ccache-like tool. It is used as a compiler wrapper and avoids compilation when possible. Sccache has the capability to utilize caching in remote storage environments, including various cloud storage options, or alternatively, in local storage.

Apache License 2.0

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Minimal example:

use nightly rustc: docker run -it --rm rustlang/rust:nightly bash
install sccache: rustup toolchain install 1.47.0 && cargo +1.47.0 install sccache (I have to use 1.47 due to https://github.com/mozilla/sccache/issues/887)
create a dummy project: USER=test-user cargo new --bin test-project && cd test-project
run cargo clean && cargo clippy -Z unstable-options it works
run cargo clean && RUSTC_WRAPPER="/usr/local/cargo/bin/sccache" cargo clippy -Z unstable-options

Expected: it works too. Actual: error,

error: failed to execute compile
caused by: Compiler not supported: "error: Unrecognized option: \'E\'\n\n"
error: could not compile `test-project`

mozilla / sccache

sccache v0.2.13 fails when `-Z unstable-options` are specified #889