[INFO] fetching crate covert_server 0.1.4...
[INFO] checking covert_server-0.1.4 against try#264a7c4a1c917c83d13895a31231f9d93c7b67e1 for pr-132289
[INFO] extracting crate covert_server 0.1.4 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate covert_server 0.1.4 on toolchain 264a7c4a1c917c83d13895a31231f9d93c7b67e1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+264a7c4a1c917c83d13895a31231f9d93c7b67e1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate covert_server 0.1.4
[INFO] finished tweaking crates.io crate covert_server 0.1.4
[INFO] tweaked toml for crates.io crate covert_server 0.1.4 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate crates.io crate covert_server 0.1.4 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" "+264a7c4a1c917c83d13895a31231f9d93c7b67e1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+264a7c4a1c917c83d13895a31231f9d93c7b67e1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fcf6aa48291ca6b2cfc3a6c5fa559720d66ebfecbc7b7a41b3a88c32ba6fd1ca
[INFO] running `Command { std: "docker" "start" "-a" "fcf6aa48291ca6b2cfc3a6c5fa559720d66ebfecbc7b7a41b3a88c32ba6fd1ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcf6aa48291ca6b2cfc3a6c5fa559720d66ebfecbc7b7a41b3a88c32ba6fd1ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcf6aa48291ca6b2cfc3a6c5fa559720d66ebfecbc7b7a41b3a88c32ba6fd1ca", kill_on_drop: false }`
[INFO] [stdout] fcf6aa48291ca6b2cfc3a6c5fa559720d66ebfecbc7b7a41b3a88c32ba6fd1ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+264a7c4a1c917c83d13895a31231f9d93c7b67e1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6802a0850d77863015117e0d1e7e182b6a81253dfa964bee59024b42ebd25cf1
[INFO] running `Command { std: "docker" "start" "-a" "6802a0850d77863015117e0d1e7e182b6a81253dfa964bee59024b42ebd25cf1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling parking_lot_core v0.9.6
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling tokio v1.25.0
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]    Compiling async-trait v0.1.63
[INFO] [stderr]     Checking bytes v1.3.0
[INFO] [stderr]     Checking os_str_bytes v6.4.1
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.50/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 socket2 v0.4.7
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking mio v0.8.5
[INFO] [stderr]     Checking atty v0.2.14
[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" "6802a0850d77863015117e0d1e7e182b6a81253dfa964bee59024b42ebd25cf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6802a0850d77863015117e0d1e7e182b6a81253dfa964bee59024b42ebd25cf1", kill_on_drop: false }`
[INFO] [stdout] 6802a0850d77863015117e0d1e7e182b6a81253dfa964bee59024b42ebd25cf1
