[INFO] fetching crate ctor-used-linker 0.2.0...
[INFO] testing ctor-used-linker-0.2.0 against 1.75.0 for beta-1.76-1
[INFO] extracting crate ctor-used-linker 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate ctor-used-linker 0.2.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ctor-used-linker 0.2.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ctor-used-linker 0.2.0
[INFO] tweaked toml for crates.io crate ctor-used-linker 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate ctor-used-linker 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.27
[INFO] [stderr]   Downloaded proc-macro2 v1.0.57
[INFO] [stderr]   Downloaded libc v0.2.144
[INFO] [stderr]   Downloaded syn v2.0.16
[INFO] [stderr]   Downloaded libc-print v0.1.21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de04e08e4192bfc5b70cbe853d345e5a42efc17de312e998b23bba156f436a44
[INFO] running `Command { std: "docker" "start" "-a" "de04e08e4192bfc5b70cbe853d345e5a42efc17de312e998b23bba156f436a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de04e08e4192bfc5b70cbe853d345e5a42efc17de312e998b23bba156f436a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de04e08e4192bfc5b70cbe853d345e5a42efc17de312e998b23bba156f436a44", kill_on_drop: false }`
[INFO] [stdout] de04e08e4192bfc5b70cbe853d345e5a42efc17de312e998b23bba156f436a44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 811115136e2f12bfe98fe586ffa5d38ffa894d1829db473855fc8b7f46bebb33
[INFO] running `Command { std: "docker" "start" "-a" "811115136e2f12bfe98fe586ffa5d38ffa894d1829db473855fc8b7f46bebb33", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.57
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling syn v2.0.16
[INFO] [stderr]    Compiling ctor-used-linker v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.25s
[INFO] running `Command { std: "docker" "inspect" "811115136e2f12bfe98fe586ffa5d38ffa894d1829db473855fc8b7f46bebb33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "811115136e2f12bfe98fe586ffa5d38ffa894d1829db473855fc8b7f46bebb33", kill_on_drop: false }`
[INFO] [stdout] 811115136e2f12bfe98fe586ffa5d38ffa894d1829db473855fc8b7f46bebb33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54d8bea214f5aeb9f00a427dd67cf1a52f055c46c79a489f28c90686c954c97e
[INFO] running `Command { std: "docker" "start" "-a" "54d8bea214f5aeb9f00a427dd67cf1a52f055c46c79a489f28c90686c954c97e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.57
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling syn v2.0.16
[INFO] [stderr]    Compiling libc-print v0.1.21
[INFO] [stderr]    Compiling ctor-used-linker v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/example.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(used_with_arg)]
[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 `ctor-used-linker` (example "example") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "54d8bea214f5aeb9f00a427dd67cf1a52f055c46c79a489f28c90686c954c97e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54d8bea214f5aeb9f00a427dd67cf1a52f055c46c79a489f28c90686c954c97e", kill_on_drop: false }`
[INFO] [stdout] 54d8bea214f5aeb9f00a427dd67cf1a52f055c46c79a489f28c90686c954c97e
