[INFO] cloning repository https://github.com/brunojppb/mailbolt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brunojppb/mailbolt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrunojppb%2Fmailbolt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrunojppb%2Fmailbolt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b247cf02e6d6c60401ebdaa403f899a9c48eea09
[INFO] checking brunojppb/mailbolt/b247cf02e6d6c60401ebdaa403f899a9c48eea09 against master#249595384b4589c71a00d622c4253f62c7f5ddbd for pr-127054
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrunojppb%2Fmailbolt" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brunojppb/mailbolt on toolchain 249595384b4589c71a00d622c4253f62c7f5ddbd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+249595384b4589c71a00d622c4253f62c7f5ddbd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/brunojppb/mailbolt
[INFO] finished tweaking git repo https://github.com/brunojppb/mailbolt
[INFO] tweaked toml for git repo https://github.com/brunojppb/mailbolt written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/brunojppb/mailbolt 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" "+249595384b4589c71a00d622c4253f62c7f5ddbd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-bunyan-formatter v0.3.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+249595384b4589c71a00d622c4253f62c7f5ddbd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a931d7aa98d5ed572c03600bcf571ab708ec781c0c39750c9675d096fd59d7ae
[INFO] running `Command { std: "docker" "start" "-a" "a931d7aa98d5ed572c03600bcf571ab708ec781c0c39750c9675d096fd59d7ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a931d7aa98d5ed572c03600bcf571ab708ec781c0c39750c9675d096fd59d7ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a931d7aa98d5ed572c03600bcf571ab708ec781c0c39750c9675d096fd59d7ae", kill_on_drop: false }`
[INFO] [stdout] a931d7aa98d5ed572c03600bcf571ab708ec781c0c39750c9675d096fd59d7ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+249595384b4589c71a00d622c4253f62c7f5ddbd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 714d98b2805da899851710126f92a06d5cbf05d32c2f24acba931e73939128c9
[INFO] running `Command { std: "docker" "start" "-a" "714d98b2805da899851710126f92a06d5cbf05d32c2f24acba931e73939128c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]    Compiling proc-macro2 v1.0.52
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_derive v1.0.156
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]    Compiling serde v1.0.156
[INFO] [stderr]    Compiling futures-core v0.3.27
[INFO] [stderr]    Compiling tokio v1.26.0
[INFO] [stderr]     Checking futures-sink v0.3.27
[INFO] [stderr]    Compiling futures-channel v0.3.27
[INFO] [stderr]    Compiling futures-task v0.3.27
[INFO] [stderr]    Compiling serde_json v1.0.94
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]    Compiling futures-util v0.3.27
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking percent-encoding v2.2.0
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling bytes v1.4.0
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]     Checking unicode-bidi v0.3.11
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]    Compiling paste v1.0.12
[INFO] [stderr]     Checking form_urlencoded v1.1.0
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.52/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 digest v0.10.6
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling itoa v1.0.6
[INFO] [stderr]     Checking base64 v0.21.0
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.8
[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" "714d98b2805da899851710126f92a06d5cbf05d32c2f24acba931e73939128c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "714d98b2805da899851710126f92a06d5cbf05d32c2f24acba931e73939128c9", kill_on_drop: false }`
[INFO] [stdout] 714d98b2805da899851710126f92a06d5cbf05d32c2f24acba931e73939128c9