[INFO] fetching crate graceful-shutdown 0.2.0...
[INFO] checking graceful-shutdown-0.2.0 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] extracting crate graceful-shutdown 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate graceful-shutdown 0.2.0 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate graceful-shutdown 0.2.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate graceful-shutdown 0.2.0
[INFO] tweaked toml for crates.io crate graceful-shutdown 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate graceful-shutdown 0.2.0 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-io v1.10.0
[INFO] [stderr]   Downloaded async-process v1.5.0
[INFO] [stderr]   Downloaded async-net v1.7.0
[INFO] [stderr]   Downloaded polling v2.4.0
[INFO] [stderr]   Downloaded smol v1.2.5
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9d3e3330d65b4ca1d2de5919ff5619cfce3fe49fe8983bd0a825c027ce30369
[INFO] running `Command { std: "docker" "start" "-a" "b9d3e3330d65b4ca1d2de5919ff5619cfce3fe49fe8983bd0a825c027ce30369", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9d3e3330d65b4ca1d2de5919ff5619cfce3fe49fe8983bd0a825c027ce30369", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9d3e3330d65b4ca1d2de5919ff5619cfce3fe49fe8983bd0a825c027ce30369", kill_on_drop: false }`
[INFO] [stdout] b9d3e3330d65b4ca1d2de5919ff5619cfce3fe49fe8983bd0a825c027ce30369
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c031cce17914d591c7c6722e42ca99aff448b2edc5543d0b992173ef755c41bd
[INFO] running `Command { std: "docker" "start" "-a" "c031cce17914d591c7c6722e42ca99aff448b2edc5543d0b992173ef755c41bd", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-io v0.3.25
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]     Checking concurrent-queue v1.2.4
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]    Compiling polling v2.4.0
[INFO] [stderr]     Checking slab v0.4.7
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling async-io v1.10.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/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]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking async-task v4.3.0
[INFO] [stderr]     Checking async-channel v1.7.1
[INFO] [stdout] error: aborting due to 1 previous error
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c031cce17914d591c7c6722e42ca99aff448b2edc5543d0b992173ef755c41bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c031cce17914d591c7c6722e42ca99aff448b2edc5543d0b992173ef755c41bd", kill_on_drop: false }`
[INFO] [stdout] c031cce17914d591c7c6722e42ca99aff448b2edc5543d0b992173ef755c41bd