[INFO] cloning repository https://github.com/ckaran/pyo3_issue_report_341
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ckaran/pyo3_issue_report_341" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fckaran%2Fpyo3_issue_report_341", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fckaran%2Fpyo3_issue_report_341'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d8116c36f759932a933e5ffc44b710a7415155d6
[INFO] checking ckaran/pyo3_issue_report_341 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fckaran%2Fpyo3_issue_report_341" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ckaran/pyo3_issue_report_341 on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ckaran/pyo3_issue_report_341
[INFO] finished tweaking git repo https://github.com/ckaran/pyo3_issue_report_341
[INFO] tweaked toml for git repo https://github.com/ckaran/pyo3_issue_report_341 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ckaran/pyo3_issue_report_341 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" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages to latest compatible versions
[INFO] [stderr]  Downgrading pyo3 v0.6.0-alpha.2 -> v0.6.0-alpha.1 (latest: v0.21.2)
[INFO] [stderr]  Downgrading pyo3-derive-backend v0.6.0-alpha.2 -> v0.6.0-alpha.1 (latest: v0.12.5)
[INFO] [stderr]  Downgrading pyo3cls v0.6.0-alpha.2 -> v0.6.0-alpha.1 (latest: v0.12.5)
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mashup-impl v0.1.9
[INFO] [stderr]   Downloaded proc-macro-hack-impl v0.4.1
[INFO] [stderr]   Downloaded mashup v0.1.9
[INFO] [stderr]   Downloaded proc-macro-hack v0.4.1
[INFO] [stderr]   Downloaded rusty-fork v0.2.1
[INFO] [stderr]   Downloaded wait-timeout v0.1.5
[INFO] [stderr]   Downloaded tempfile v3.0.6
[INFO] [stderr]   Downloaded pyo3 v0.6.0-alpha.1
[INFO] [stderr]   Downloaded proptest v0.9.0
[INFO] [stderr]   Downloaded proptest-derive v0.1.0
[INFO] [stderr]   Downloaded pyo3-derive-backend v0.6.0-alpha.1
[INFO] [stderr]   Downloaded pyo3cls v0.6.0-alpha.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e7999907300c53d3e0b44916658f5ddc556172fe3176ad1d18125be9e7e8191
[INFO] running `Command { std: "docker" "start" "-a" "4e7999907300c53d3e0b44916658f5ddc556172fe3176ad1d18125be9e7e8191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e7999907300c53d3e0b44916658f5ddc556172fe3176ad1d18125be9e7e8191", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e7999907300c53d3e0b44916658f5ddc556172fe3176ad1d18125be9e7e8191", kill_on_drop: false }`
[INFO] [stdout] 4e7999907300c53d3e0b44916658f5ddc556172fe3176ad1d18125be9e7e8191
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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:beeedbb442662e57d416641ecc3200b38e573c25b057896194468d05594dd835" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51d519fd9f28a5bbe4b3ff2bb211c62e8ebb0e59d54d7082d09bc0928fc83009
[INFO] running `Command { std: "docker" "start" "-a" "51d519fd9f28a5bbe4b3ff2bb211c62e8ebb0e59d54d7082d09bc0928fc83009", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling memchr v2.1.3
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling spin v0.4.10
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/spin-0.4.10/src/lib.rs:6:43
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "const_fn", feature(const_fn))]
[INFO] [stdout]   |                                           ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spin` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "51d519fd9f28a5bbe4b3ff2bb211c62e8ebb0e59d54d7082d09bc0928fc83009", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51d519fd9f28a5bbe4b3ff2bb211c62e8ebb0e59d54d7082d09bc0928fc83009", kill_on_drop: false }`
[INFO] [stdout] 51d519fd9f28a5bbe4b3ff2bb211c62e8ebb0e59d54d7082d09bc0928fc83009