[INFO] cloning repository https://github.com/bnbeckwith/ergowhat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bnbeckwith/ergowhat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnbeckwith%2Fergowhat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnbeckwith%2Fergowhat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0104c731163c498ae62701c803e4cb38ec49e336
[INFO] checking bnbeckwith/ergowhat against master#fc81ad22c453776de16acf9938976930cf8c9401 for pr-77325
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbnbeckwith%2Fergowhat" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bnbeckwith/ergowhat on toolchain fc81ad22c453776de16acf9938976930cf8c9401
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bnbeckwith/ergowhat
[INFO] finished tweaking git repo https://github.com/bnbeckwith/ergowhat
[INFO] tweaked toml for git repo https://github.com/bnbeckwith/ergowhat written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/bnbeckwith/ergowhat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49137a501fd4a237fd87bc5c0302356b410d030eb7386099a445766323a0caac
[INFO] running `Command { std: "docker" "start" "-a" "49137a501fd4a237fd87bc5c0302356b410d030eb7386099a445766323a0caac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49137a501fd4a237fd87bc5c0302356b410d030eb7386099a445766323a0caac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49137a501fd4a237fd87bc5c0302356b410d030eb7386099a445766323a0caac", kill_on_drop: false }`
[INFO] [stdout] 49137a501fd4a237fd87bc5c0302356b410d030eb7386099a445766323a0caac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0692dadc300debf01f8c19ccf2e4e08ce71ac203430377dd6d02437161480474
[INFO] running `Command { std: "docker" "start" "-a" "0692dadc300debf01f8c19ccf2e4e08ce71ac203430377dd6d02437161480474", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.39
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling serde v1.0.71
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.15
[INFO] [stderr]    Compiling cfg-if v0.1.4
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]     Checking svg v0.5.10
[INFO] [stderr]    Compiling dtoa v0.4.3
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.5.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stdout] error[E0658]: use of unstable library feature 'proc_macro_def_site'
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.9/src/unstable.rs:347:27
[INFO] [stdout]     |
[INFO] [stdout] 347 |             Span::Nightly(proc_macro::Span::def_site())
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #54724 <https://github.com/rust-lang/rust/issues/54724> for more information
[INFO] [stdout]     = help: add `#![feature(proc_macro_def_site)]` to the crate attributes 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 E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0692dadc300debf01f8c19ccf2e4e08ce71ac203430377dd6d02437161480474", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0692dadc300debf01f8c19ccf2e4e08ce71ac203430377dd6d02437161480474", kill_on_drop: false }`
[INFO] [stdout] 0692dadc300debf01f8c19ccf2e4e08ce71ac203430377dd6d02437161480474