[INFO] cloning repository https://github.com/nikomatsakis/rust-metrics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nikomatsakis/rust-metrics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikomatsakis%2Frust-metrics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikomatsakis%2Frust-metrics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3e3250d73c09097d66d52e5af752162150628c8f
[INFO] checking nikomatsakis/rust-metrics against try#2278ef25f90817c20d6dd0d2da58a990eb6f53cb for pr-145108-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikomatsakis%2Frust-metrics" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/nikomatsakis/rust-metrics
[INFO] finished tweaking git repo https://github.com/nikomatsakis/rust-metrics
[INFO] tweaked toml for git repo https://github.com/nikomatsakis/rust-metrics written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nikomatsakis/rust-metrics on toolchain 2278ef25f90817c20d6dd0d2da58a990eb6f53cb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2278ef25f90817c20d6dd0d2da58a990eb6f53cb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nikomatsakis/rust-metrics 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" "+2278ef25f90817c20d6dd0d2da58a990eb6f53cb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded stable-eyre v0.2.2
[INFO] [stderr]   Downloaded graphql_query_derive v0.10.0
[INFO] [stderr]   Downloaded fehler-macros v1.0.0
[INFO] [stderr]   Downloaded kstring v2.0.0
[INFO] [stderr]   Downloaded crates-io v0.34.0
[INFO] [stderr]   Downloaded utf8parse v0.2.0
[INFO] [stderr]   Downloaded fwdansi v1.1.0
[INFO] [stderr]   Downloaded filetime v0.2.19
[INFO] [stderr]   Downloaded git2-curl v0.15.0
[INFO] [stderr]   Downloaded rustc-workspace-hack v1.0.0
[INFO] [stderr]   Downloaded fehler v1.0.0
[INFO] [stderr]   Downloaded os_info v3.5.1
[INFO] [stderr]   Downloaded graphql_client v0.10.0
[INFO] [stderr]   Downloaded graphql-parser v0.2.3
[INFO] [stderr]   Downloaded octocrab v0.12.0
[INFO] [stderr]   Downloaded curl v0.4.44
[INFO] [stderr]   Downloaded url v2.3.0
[INFO] [stderr]   Downloaded hyperx v1.4.0
[INFO] [stderr]   Downloaded graphql_client_codegen v0.10.0
[INFO] [stderr]   Downloaded object v0.30.1
[INFO] [stderr]   Downloaded git2 v0.14.4
[INFO] [stderr]   Downloaded im-rc v15.1.0
[INFO] [stderr]   Downloaded ignore v0.4.19
[INFO] [stderr]   Downloaded serde_ignored v0.1.7
[INFO] [stderr]   Downloaded tar v0.4.38
[INFO] [stderr]   Downloaded rustfix v0.6.1
[INFO] [stderr]   Downloaded async-trait v0.1.61
[INFO] [stderr]   Downloaded bstr v1.1.0
[INFO] [stderr]   Downloaded cargo-util v0.2.2
[INFO] [stderr]   Downloaded opener v0.5.0
[INFO] [stderr]   Downloaded libssh2-sys v0.2.23
[INFO] [stderr]   Downloaded gimli v0.27.0
[INFO] [stderr]   Downloaded libgit2-sys v0.13.4+1.4.2
[INFO] [stderr]   Downloaded cargo v0.65.0
[INFO] [stderr]   Downloaded curl-sys v0.4.59+curl-7.86.0
[INFO] [stderr]   Downloaded libnghttp2-sys v0.1.7+1.45.0
[INFO] [stderr]   Downloaded rust-playground-top-crates v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2278ef25f90817c20d6dd0d2da58a990eb6f53cb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e1fbc159bdef567fc4a36eb64751a2db96208fd3112163a432f7d05c8714a90
[INFO] running `Command { std: "docker" "start" "-a" "5e1fbc159bdef567fc4a36eb64751a2db96208fd3112163a432f7d05c8714a90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e1fbc159bdef567fc4a36eb64751a2db96208fd3112163a432f7d05c8714a90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e1fbc159bdef567fc4a36eb64751a2db96208fd3112163a432f7d05c8714a90", kill_on_drop: false }`
[INFO] [stdout] 5e1fbc159bdef567fc4a36eb64751a2db96208fd3112163a432f7d05c8714a90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2278ef25f90817c20d6dd0d2da58a990eb6f53cb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 02fb9e1dc8edaf0d4b6bdc23da76b0f8eac78c28e2f2409e4c9a566dbaa3e16c
[INFO] running `Command { std: "docker" "start" "-a" "02fb9e1dc8edaf0d4b6bdc23da76b0f8eac78c28e2f2409e4c9a566dbaa3e16c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]    Compiling openssl v0.10.45
[INFO] [stderr]     Checking parking_lot_core v0.9.5
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]    Compiling tokio v1.24.1
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking mio v0.8.5
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.49/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]    Compiling gimli v0.27.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[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" "02fb9e1dc8edaf0d4b6bdc23da76b0f8eac78c28e2f2409e4c9a566dbaa3e16c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02fb9e1dc8edaf0d4b6bdc23da76b0f8eac78c28e2f2409e4c9a566dbaa3e16c", kill_on_drop: false }`
[INFO] [stdout] 02fb9e1dc8edaf0d4b6bdc23da76b0f8eac78c28e2f2409e4c9a566dbaa3e16c