[INFO] cloning repository https://github.com/GradyCongdon/dog-ear
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GradyCongdon/dog-ear" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGradyCongdon%2Fdog-ear", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGradyCongdon%2Fdog-ear'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 301536d57b8cdfc6ca1194dd34045a5601deb2c2
[INFO] building GradyCongdon/dog-ear against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGradyCongdon%2Fdog-ear" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GradyCongdon/dog-ear on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/GradyCongdon/dog-ear
[INFO] finished tweaking git repo https://github.com/GradyCongdon/dog-ear
[INFO] tweaked toml for git repo https://github.com/GradyCongdon/dog-ear written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/GradyCongdon/dog-ear 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" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded enumset_derive v0.6.1
[INFO] [stderr]   Downloaded time v0.3.15
[INFO] [stderr]   Downloaded enumset v1.0.12
[INFO] [stderr]   Downloaded enum-map v2.4.1
[INFO] [stderr]   Downloaded ahash v0.8.0
[INFO] [stderr]   Downloaded enum-map-derive v0.10.0
[INFO] [stderr]   Downloaded open v3.0.3
[INFO] [stderr]   Downloaded serde_json v1.0.86
[INFO] [stderr]   Downloaded cursive_core v0.3.5
[INFO] [stderr]   Downloaded pdcurses-sys v0.7.1
[INFO] [stderr]   Downloaded pancurses v0.17.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0e20ada49e83ae17ab10f8d7e9ddc50b50c04e68892e8cdbab058d836540e1be
[INFO] running `Command { std: "docker" "start" "-a" "0e20ada49e83ae17ab10f8d7e9ddc50b50c04e68892e8cdbab058d836540e1be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e20ada49e83ae17ab10f8d7e9ddc50b50c04e68892e8cdbab058d836540e1be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e20ada49e83ae17ab10f8d7e9ddc50b50c04e68892e8cdbab058d836540e1be", kill_on_drop: false }`
[INFO] [stdout] 0e20ada49e83ae17ab10f8d7e9ddc50b50c04e68892e8cdbab058d836540e1be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 561a55046f6253d226b759b783b6546103978d42302c786a5b07d80a7097a5d4
[INFO] running `Command { std: "docker" "start" "-a" "561a55046f6253d226b759b783b6546103978d42302c786a5b07d80a7097a5d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling syn v1.0.102
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling ahash v0.8.0
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling num_threads v0.1.6
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling once_cell v1.15.0
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling xi-unicode v0.3.0
[INFO] [stderr]    Compiling serde_json v1.0.86
[INFO] [stderr]    Compiling unicode-segmentation v1.10.0
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling pathdiff v0.2.1
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/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] [stderr]    Compiling open v3.0.3
[INFO] [stderr]    Compiling crossbeam-channel v0.5.6
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling ncurses v5.101.0
[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" "561a55046f6253d226b759b783b6546103978d42302c786a5b07d80a7097a5d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "561a55046f6253d226b759b783b6546103978d42302c786a5b07d80a7097a5d4", kill_on_drop: false }`
[INFO] [stdout] 561a55046f6253d226b759b783b6546103978d42302c786a5b07d80a7097a5d4
