[INFO] cloning repository https://github.com/meyer1994/srt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/meyer1994/srt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeyer1994%2Fsrt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeyer1994%2Fsrt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c38f64707bdb61d54b400380a7f61335a8d90cbe
[INFO] checking meyer1994/srt/c38f64707bdb61d54b400380a7f61335a8d90cbe against master#683dd08db5808c41baceef49368fc82a6c4767bb for pr-149137
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmeyer1994%2Fsrt" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/meyer1994/srt
[INFO] finished tweaking git repo https://github.com/meyer1994/srt
[INFO] tweaked toml for git repo https://github.com/meyer1994/srt written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/meyer1994/srt on toolchain 683dd08db5808c41baceef49368fc82a6c4767bb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+683dd08db5808c41baceef49368fc82a6c4767bb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/meyer1994/srt 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" "+683dd08db5808c41baceef49368fc82a6c4767bb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pest_meta v2.7.6
[INFO] [stderr]   Downloaded syn v1.0.84
[INFO] [stderr]   Downloaded pest_derive v2.7.6
[INFO] [stderr]   Downloaded pest_generator v2.7.6
[INFO] [stderr]   Downloaded memchr v2.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+683dd08db5808c41baceef49368fc82a6c4767bb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74ca7749fa695b75c28acfb10c777535c0ea9bca37e63e684c51d5d56f3a1157
[INFO] running `Command { std: "docker" "start" "-a" "74ca7749fa695b75c28acfb10c777535c0ea9bca37e63e684c51d5d56f3a1157", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74ca7749fa695b75c28acfb10c777535c0ea9bca37e63e684c51d5d56f3a1157", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74ca7749fa695b75c28acfb10c777535c0ea9bca37e63e684c51d5d56f3a1157", kill_on_drop: false }`
[INFO] [stdout] 74ca7749fa695b75c28acfb10c777535c0ea9bca37e63e684c51d5d56f3a1157
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+683dd08db5808c41baceef49368fc82a6c4767bb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4e7b1837ba2c8777cdae9085239a4b1eb046c7fc13c15a1ab4be3712d39b7ff
[INFO] running `Command { std: "docker" "start" "-a" "b4e7b1837ba2c8777cdae9085239a4b1eb046c7fc13c15a1ab4be3712d39b7ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling memchr v2.6.2
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/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] 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" "b4e7b1837ba2c8777cdae9085239a4b1eb046c7fc13c15a1ab4be3712d39b7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4e7b1837ba2c8777cdae9085239a4b1eb046c7fc13c15a1ab4be3712d39b7ff", kill_on_drop: false }`
[INFO] [stdout] b4e7b1837ba2c8777cdae9085239a4b1eb046c7fc13c15a1ab4be3712d39b7ff