[INFO] cloning repository https://github.com/jonandrewdavis/monthly-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jonandrewdavis/monthly-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonandrewdavis%2Fmonthly-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonandrewdavis%2Fmonthly-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ad99407b7eaf8db2d62ea0d1df0c9aa8a3b99ac5
[INFO] checking jonandrewdavis/monthly-rust against try#446cb600aa4837dd6c513f14fa0d25a909b177d7 for pr-149195
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonandrewdavis%2Fmonthly-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jonandrewdavis/monthly-rust
[INFO] finished tweaking git repo https://github.com/jonandrewdavis/monthly-rust
[INFO] tweaked toml for git repo https://github.com/jonandrewdavis/monthly-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jonandrewdavis/monthly-rust on toolchain 446cb600aa4837dd6c513f14fa0d25a909b177d7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jonandrewdavis/monthly-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" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "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 windows-implement v0.42.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6627eaa78b67ff107fcb89a97895703d5ef8e0d1594f8b718ae67cf96edfe005
[INFO] running `Command { std: "docker" "start" "-a" "6627eaa78b67ff107fcb89a97895703d5ef8e0d1594f8b718ae67cf96edfe005", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6627eaa78b67ff107fcb89a97895703d5ef8e0d1594f8b718ae67cf96edfe005", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6627eaa78b67ff107fcb89a97895703d5ef8e0d1594f8b718ae67cf96edfe005", kill_on_drop: false }`
[INFO] [stdout] 6627eaa78b67ff107fcb89a97895703d5ef8e0d1594f8b718ae67cf96edfe005
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+446cb600aa4837dd6c513f14fa0d25a909b177d7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 014ab9d5966ff185e69b246a662a397806732b951f100716781f5301bf2035f9
[INFO] running `Command { std: "docker" "start" "-a" "014ab9d5966ff185e69b246a662a397806732b951f100716781f5301bf2035f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling serde v1.0.151
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling version-compare v0.1.1
[INFO] [stderr]    Compiling libm v0.2.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking libloading v0.7.4
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]    Compiling parking_lot_core v0.9.5
[INFO] [stderr]    Compiling wayland-sys v0.29.5
[INFO] [stderr]     Checking raw-window-handle v0.5.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/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]     Checking dlib v0.5.0
[INFO] [stderr]    Compiling slotmap v1.0.6
[INFO] [stderr]    Compiling cfg-expr v0.11.0
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]     Checking num_cpus v1.14.0
[INFO] [stderr]     Checking ttf-parser v0.17.1
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[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" "014ab9d5966ff185e69b246a662a397806732b951f100716781f5301bf2035f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "014ab9d5966ff185e69b246a662a397806732b951f100716781f5301bf2035f9", kill_on_drop: false }`
[INFO] [stdout] 014ab9d5966ff185e69b246a662a397806732b951f100716781f5301bf2035f9