[INFO] fetching crate mack 1.4.0...
[INFO] checking mack-1.4.0 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate mack 1.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate mack 1.4.0 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mack 1.4.0
[INFO] finished tweaking crates.io crate mack 1.4.0
[INFO] tweaked toml for crates.io crate mack 1.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate mack 1.4.0 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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded funcfmt v0.3.0
[INFO] [stderr]   Downloaded id3 v1.7.0
[INFO] [stderr]   Downloaded cow-utils v0.1.2
[INFO] [stderr]   Downloaded bitflags v2.1.0
[INFO] [stderr]   Downloaded clap v4.2.7
[INFO] [stderr]   Downloaded jwalk v0.8.1
[INFO] [stderr]   Downloaded clap_builder v4.2.7
[INFO] [stderr]   Downloaded libc v0.2.143
[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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad4a9fa3e7fd100bb8283d00516fa6bf6ff04deed7dcf03c51cf0fdbb7a7f9a1
[INFO] running `Command { std: "docker" "start" "-a" "ad4a9fa3e7fd100bb8283d00516fa6bf6ff04deed7dcf03c51cf0fdbb7a7f9a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad4a9fa3e7fd100bb8283d00516fa6bf6ff04deed7dcf03c51cf0fdbb7a7f9a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad4a9fa3e7fd100bb8283d00516fa6bf6ff04deed7dcf03c51cf0fdbb7a7f9a1", kill_on_drop: false }`
[INFO] [stdout] ad4a9fa3e7fd100bb8283d00516fa6bf6ff04deed7dcf03c51cf0fdbb7a7f9a1
[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" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4806776bfc341372b58ea2ebf1c91da15de6d0060b7db68c38f35134460925da
[INFO] running `Command { std: "docker" "start" "-a" "4806776bfc341372b58ea2ebf1c91da15de6d0060b7db68c38f35134460925da", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling libc v0.2.143
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling crossbeam-queue v0.3.8
[INFO] [stderr]     Checking clap_lex v0.4.1
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling smartstring v1.0.1
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking anstyle v1.0.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.14
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]     Checking aho-corasick v1.0.1
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking bitflags v2.1.0
[INFO] [stderr]     Checking regex-syntax v0.7.1
[INFO] [stderr]     Checking cow-utils v0.1.2
[INFO] [stderr]     Checking clap_builder v4.2.7
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.56/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] [stderr]     Checking flate2 v1.0.25
[INFO] [stderr]     Checking crossbeam v0.8.2
[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" "4806776bfc341372b58ea2ebf1c91da15de6d0060b7db68c38f35134460925da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4806776bfc341372b58ea2ebf1c91da15de6d0060b7db68c38f35134460925da", kill_on_drop: false }`
[INFO] [stdout] 4806776bfc341372b58ea2ebf1c91da15de6d0060b7db68c38f35134460925da
