[INFO] cloning repository https://github.com/renec-chain/renec
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/renec-chain/renec" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenec-chain%2Frenec", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenec-chain%2Frenec'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 44c971742b59de6acfe55e908f1840c0e132e15c
[INFO] checking renec-chain/renec/44c971742b59de6acfe55e908f1840c0e132e15c against master#ff086354c9fc93e1da1d2f4d255456624fbcd099 for pr-153513
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frenec-chain%2Frenec" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/renec-chain/renec
[INFO] finished tweaking git repo https://github.com/renec-chain/renec
[INFO] tweaked toml for git repo https://github.com/renec-chain/renec written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/renec-chain/renec on toolchain ff086354c9fc93e1da1d2f4d255456624fbcd099
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/renec-chain/renec 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" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1e4ed71dae4eb0b650b98ba06fcecc1ef4f2888e8bec95e0f4898be6db57eaa
[INFO] running `Command { std: "docker" "start" "-a" "c1e4ed71dae4eb0b650b98ba06fcecc1ef4f2888e8bec95e0f4898be6db57eaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1e4ed71dae4eb0b650b98ba06fcecc1ef4f2888e8bec95e0f4898be6db57eaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1e4ed71dae4eb0b650b98ba06fcecc1ef4f2888e8bec95e0f4898be6db57eaa", kill_on_drop: false }`
[INFO] [stdout] c1e4ed71dae4eb0b650b98ba06fcecc1ef4f2888e8bec95e0f4898be6db57eaa
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d8e676c8558b66c5aa93b600db893a15b275f85fb9c2c2587279f773d0e1523
[INFO] running `Command { std: "docker" "start" "-a" "6d8e676c8558b66c5aa93b600db893a15b275f85fb9c2c2587279f773d0e1523", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.52
[INFO] [stderr]    Compiling unicode-ident v1.0.2
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.138
[INFO] [stderr]    Compiling serde v1.0.138
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling semver v1.0.10
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.52/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a feature with a similar name: `proc_macro_span_file`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout] 92 +     feature(proc_macro_span, proc_macro_span_file)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking either v1.7.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6d8e676c8558b66c5aa93b600db893a15b275f85fb9c2c2587279f773d0e1523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d8e676c8558b66c5aa93b600db893a15b275f85fb9c2c2587279f773d0e1523", kill_on_drop: false }`
[INFO] [stdout] 6d8e676c8558b66c5aa93b600db893a15b275f85fb9c2c2587279f773d0e1523