[INFO] fetching crate interpolate 0.2.3...
[INFO] testing interpolate-0.2.3 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate interpolate 0.2.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate interpolate 0.2.3 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate interpolate 0.2.3
[INFO] finished tweaking crates.io crate interpolate 0.2.3
[INFO] tweaked toml for crates.io crate interpolate 0.2.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: library `interpolate` should only specify `proc-macro = true` instead of setting `crate-type`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a106b63ba9d3836141cf974c6172f17a07174bf61678d93f7ffb93d3be8aac4b
[INFO] running `Command { std: "docker" "start" "-a" "a106b63ba9d3836141cf974c6172f17a07174bf61678d93f7ffb93d3be8aac4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a106b63ba9d3836141cf974c6172f17a07174bf61678d93f7ffb93d3be8aac4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a106b63ba9d3836141cf974c6172f17a07174bf61678d93f7ffb93d3be8aac4b", kill_on_drop: false }`
[INFO] [stdout] a106b63ba9d3836141cf974c6172f17a07174bf61678d93f7ffb93d3be8aac4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e655b4b04d030a0c938c0cf29ded00fbdcd8873d0f44e6fa1f67aa87f4073ed
[INFO] running `Command { std: "docker" "start" "-a" "0e655b4b04d030a0c938c0cf29ded00fbdcd8873d0f44e6fa1f67aa87f4073ed", kill_on_drop: false }`
[INFO] [stderr] warning: library `interpolate` should only specify `proc-macro = true` instead of setting `crate-type`
[INFO] [stderr]    Compiling interpolate v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(proc_macro_hygiene, proc_macro_quote)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `interpolate` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "0e655b4b04d030a0c938c0cf29ded00fbdcd8873d0f44e6fa1f67aa87f4073ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e655b4b04d030a0c938c0cf29ded00fbdcd8873d0f44e6fa1f67aa87f4073ed", kill_on_drop: false }`
[INFO] [stdout] 0e655b4b04d030a0c938c0cf29ded00fbdcd8873d0f44e6fa1f67aa87f4073ed