[INFO] cloning repository https://github.com/Crazytieguy/demonstration-of-branching-cost-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Crazytieguy/demonstration-of-branching-cost-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCrazytieguy%2Fdemonstration-of-branching-cost-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCrazytieguy%2Fdemonstration-of-branching-cost-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9204841d4716a0f97989c4a1effad15f940a6b5a
[INFO] testing Crazytieguy/demonstration-of-branching-cost-in-rust/9204841d4716a0f97989c4a1effad15f940a6b5a against master#2fd6efc32704647e64d3d646d21c4c68eae100e4 for pr-149852-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCrazytieguy%2Fdemonstration-of-branching-cost-in-rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Crazytieguy/demonstration-of-branching-cost-in-rust
[INFO] finished tweaking git repo https://github.com/Crazytieguy/demonstration-of-branching-cost-in-rust
[INFO] tweaked toml for git repo https://github.com/Crazytieguy/demonstration-of-branching-cost-in-rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Crazytieguy/demonstration-of-branching-cost-in-rust on toolchain 2fd6efc32704647e64d3d646d21c4c68eae100e4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Crazytieguy/demonstration-of-branching-cost-in-rust 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" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ciborium-ll v0.2.0
[INFO] [stderr]   Downloaded ciborium-io v0.2.0
[INFO] [stderr]   Downloaded ciborium v0.2.0
[INFO] [stderr]   Downloaded plotters-svg v0.3.3
[INFO] [stderr]   Downloaded plotters-backend v0.3.4
[INFO] [stderr]   Downloaded criterion v0.4.0
[INFO] [stderr]   Downloaded plotters v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 741632a3d4b9648852b62e5eb708bedf03b876a9db53990dbc2290d64e91a2d1
[INFO] running `Command { std: "docker" "start" "-a" "741632a3d4b9648852b62e5eb708bedf03b876a9db53990dbc2290d64e91a2d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "741632a3d4b9648852b62e5eb708bedf03b876a9db53990dbc2290d64e91a2d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "741632a3d4b9648852b62e5eb708bedf03b876a9db53990dbc2290d64e91a2d1", kill_on_drop: false }`
[INFO] [stdout] 741632a3d4b9648852b62e5eb708bedf03b876a9db53990dbc2290d64e91a2d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db44c09ecadfeeae04fd7b3ab00461a6009176efa25afe681fb7229deb3acbbc
[INFO] running `Command { std: "docker" "start" "-a" "db44c09ecadfeeae04fd7b3ab00461a6009176efa25afe681fb7229deb3acbbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling shape v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "db44c09ecadfeeae04fd7b3ab00461a6009176efa25afe681fb7229deb3acbbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db44c09ecadfeeae04fd7b3ab00461a6009176efa25afe681fb7229deb3acbbc", kill_on_drop: false }`
[INFO] [stdout] db44c09ecadfeeae04fd7b3ab00461a6009176efa25afe681fb7229deb3acbbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+2fd6efc32704647e64d3d646d21c4c68eae100e4" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a75d21089fb8e11b1b012274ecf26e3c0d9284d1588a9441f8e60b8fcd45540
[INFO] running `Command { std: "docker" "start" "-a" "0a75d21089fb8e11b1b012274ecf26e3c0d9284d1588a9441f8e60b8fcd45540", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.7
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling serde_json v1.0.93
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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 num_cpus v1.15.0
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling half v1.8.2
[INFO] [stderr]    Compiling ciborium-io v0.2.0
[INFO] [stderr]    Compiling plotters-backend v0.3.4
[INFO] [stderr]    Compiling ryu v1.0.13
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[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" "0a75d21089fb8e11b1b012274ecf26e3c0d9284d1588a9441f8e60b8fcd45540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a75d21089fb8e11b1b012274ecf26e3c0d9284d1588a9441f8e60b8fcd45540", kill_on_drop: false }`
[INFO] [stdout] 0a75d21089fb8e11b1b012274ecf26e3c0d9284d1588a9441f8e60b8fcd45540