[INFO] fetching crate cxx-gen 0.7.56...
[INFO] checking cxx-gen-0.7.56 against 1.55.0 for beta-1.56-3
[INFO] extracting crate cxx-gen 0.7.56 into /workspace/builds/worker-40/source
[INFO] validating manifest of crates.io crate cxx-gen 0.7.56 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 cxx-gen 0.7.56
[INFO] finished tweaking crates.io crate cxx-gen 0.7.56
[INFO] tweaked toml for crates.io crate cxx-gen 0.7.56 written to /workspace/builds/worker-40/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] warning: `rust-version` is not supported on this version of Cargo and will be ignored
[INFO] [stderr] 
[INFO] [stderr] this Cargo does not support nightly features, but if you
[INFO] [stderr] switch to nightly channel you can add
[INFO] [stderr] `cargo-features = ["rust-version"]` to enable this feature
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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] 39b6067ef6eacd92c5544d667ce11f1431710dd83712509f1e989fad4fd38673
[INFO] running `Command { std: "docker" "start" "-a" "39b6067ef6eacd92c5544d667ce11f1431710dd83712509f1e989fad4fd38673", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39b6067ef6eacd92c5544d667ce11f1431710dd83712509f1e989fad4fd38673", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39b6067ef6eacd92c5544d667ce11f1431710dd83712509f1e989fad4fd38673", kill_on_drop: false }`
[INFO] [stdout] 39b6067ef6eacd92c5544d667ce11f1431710dd83712509f1e989fad4fd38673
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44094084cf21c68173df3bddf7d7e7a4fd01926c279c924b3d927baa3445848d
[INFO] running `Command { std: "docker" "start" "-a" "44094084cf21c68173df3bddf7d7e7a4fd01926c279c924b3d927baa3445848d", kill_on_drop: false }`
[INFO] [stderr] warning: `rust-version` is not supported on this version of Cargo and will be ignored
[INFO] [stderr] 
[INFO] [stderr] this Cargo does not support nightly features, but if you
[INFO] [stderr] switch to nightly channel you can add
[INFO] [stderr] `cargo-features = ["rust-version"]` to enable this feature
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking cc v1.0.71
[INFO] [stderr]     Checking codespan-reporting v0.11.1
[INFO] [stderr]     Checking quote v1.0.10
[INFO] [stderr]     Checking cxx-gen v0.7.56 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.33s
[INFO] running `Command { std: "docker" "inspect" "44094084cf21c68173df3bddf7d7e7a4fd01926c279c924b3d927baa3445848d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44094084cf21c68173df3bddf7d7e7a4fd01926c279c924b3d927baa3445848d", kill_on_drop: false }`
[INFO] [stdout] 44094084cf21c68173df3bddf7d7e7a4fd01926c279c924b3d927baa3445848d
