[INFO] fetching crate mpc 0.1.10...
[INFO] testing mpc-0.1.10 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mpc 0.1.10 into /workspace/builds/worker-42/source
[INFO] validating manifest of crates.io crate mpc 0.1.10 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mpc 0.1.10
[INFO] finished tweaking crates.io crate mpc 0.1.10
[INFO] tweaked toml for crates.io crate mpc 0.1.10 written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8c30594b60c2f0e726badad004ad451b522b42ba5dfe7922a5800e9bd08b200
[INFO] running `Command { std: "docker" "start" "-a" "b8c30594b60c2f0e726badad004ad451b522b42ba5dfe7922a5800e9bd08b200", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8c30594b60c2f0e726badad004ad451b522b42ba5dfe7922a5800e9bd08b200", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8c30594b60c2f0e726badad004ad451b522b42ba5dfe7922a5800e9bd08b200", kill_on_drop: false }`
[INFO] [stdout] b8c30594b60c2f0e726badad004ad451b522b42ba5dfe7922a5800e9bd08b200
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2add6e610edbe7e9bdceb5a2bccca0bf343f27dbf6a667fd1c2b3bfaaa85d74c
[INFO] running `Command { std: "docker" "start" "-a" "2add6e610edbe7e9bdceb5a2bccca0bf343f27dbf6a667fd1c2b3bfaaa85d74c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling mpc v0.1.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated type alias `gcc::Config`: gcc::Config has been renamed to gcc::Build
[INFO] [stdout]  --> build.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 |     gcc::Config::new()
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `gcc::Build::new`: crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stdout]  --> build.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 |     gcc::Config::new()
[INFO] [stdout]   |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(inclusive_range_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
[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 `mpc` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2add6e610edbe7e9bdceb5a2bccca0bf343f27dbf6a667fd1c2b3bfaaa85d74c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2add6e610edbe7e9bdceb5a2bccca0bf343f27dbf6a667fd1c2b3bfaaa85d74c", kill_on_drop: false }`
[INFO] [stdout] 2add6e610edbe7e9bdceb5a2bccca0bf343f27dbf6a667fd1c2b3bfaaa85d74c