[INFO] cloning repository https://github.com/enoent4400/rust-newsletter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/enoent4400/rust-newsletter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fenoent4400%2Frust-newsletter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fenoent4400%2Frust-newsletter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 45fab9a35847af0d669ad7cb9a61aa5ca46b1ac1
[INFO] checking enoent4400/rust-newsletter/45fab9a35847af0d669ad7cb9a61aa5ca46b1ac1 against master#d8810e3e2dab96778d20dd6d746ff95465515509 for pr-137045
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fenoent4400%2Frust-newsletter" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/enoent4400/rust-newsletter on toolchain d8810e3e2dab96778d20dd6d746ff95465515509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d8810e3e2dab96778d20dd6d746ff95465515509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/enoent4400/rust-newsletter
[INFO] finished tweaking git repo https://github.com/enoent4400/rust-newsletter
[INFO] tweaked toml for git repo https://github.com/enoent4400/rust-newsletter written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/enoent4400/rust-newsletter 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" "+d8810e3e2dab96778d20dd6d746ff95465515509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: target.aarch64-apple-darwin.rustflags
[INFO] [stderr] warning: unused manifest key: target.x86_64-apple-darwin.rustflags
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.13
[INFO] [stderr]   Downloaded crossbeam-queue v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+d8810e3e2dab96778d20dd6d746ff95465515509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0245fb134cbc7bd7455986798c6198ab7d8bc1efa7cc60f221e7d720e5b3c841
[INFO] running `Command { std: "docker" "start" "-a" "0245fb134cbc7bd7455986798c6198ab7d8bc1efa7cc60f221e7d720e5b3c841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0245fb134cbc7bd7455986798c6198ab7d8bc1efa7cc60f221e7d720e5b3c841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0245fb134cbc7bd7455986798c6198ab7d8bc1efa7cc60f221e7d720e5b3c841", kill_on_drop: false }`
[INFO] [stdout] 0245fb134cbc7bd7455986798c6198ab7d8bc1efa7cc60f221e7d720e5b3c841
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+d8810e3e2dab96778d20dd6d746ff95465515509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73b8d93f79eaab17f7d1f2c08c929d769e7452c6f6b6cd0e18a5d0d0a742b7de
[INFO] running `Command { std: "docker" "start" "-a" "73b8d93f79eaab17f7d1f2c08c929d769e7452c6f6b6cd0e18a5d0d0a742b7de", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: target.aarch64-apple-darwin.rustflags
[INFO] [stderr] warning: unused manifest key: target.x86_64-apple-darwin.rustflags
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling syn v1.0.102
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/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 generic-array v0.14.6
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking bytes v1.2.1
[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" "73b8d93f79eaab17f7d1f2c08c929d769e7452c6f6b6cd0e18a5d0d0a742b7de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73b8d93f79eaab17f7d1f2c08c929d769e7452c6f6b6cd0e18a5d0d0a742b7de", kill_on_drop: false }`
[INFO] [stdout] 73b8d93f79eaab17f7d1f2c08c929d769e7452c6f6b6cd0e18a5d0d0a742b7de