[INFO] cloning repository https://github.com/adrifcastr/rex
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adrifcastr/rex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadrifcastr%2Frex", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadrifcastr%2Frex'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7bad57cb527d2e285299cbd7d12082cbe100f064
[INFO] checking adrifcastr/rex against 65c7d39f9c2b9d5c316725cb48fa3d360c64c663 for pr-161253
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadrifcastr%2Frex" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
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[INFO] started tweaking git repo https://github.com/adrifcastr/rex
[INFO] finished tweaking git repo https://github.com/adrifcastr/rex
[INFO] tweaked toml for git repo https://github.com/adrifcastr/rex written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/adrifcastr/rex on toolchain 65c7d39f9c2b9d5c316725cb48fa3d360c64c663
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+65c7d39f9c2b9d5c316725cb48fa3d360c64c663" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/adrifcastr/rex 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" "+65c7d39f9c2b9d5c316725cb48fa3d360c64c663" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c
[INFO] running `Command { std: "docker" "start" "4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c" "/opt/rustwide/cargo-home/bin/cargo" "+65c7d39f9c2b9d5c316725cb48fa3d360c64c663" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c" "/opt/rustwide/cargo-home/bin/cargo" "+65c7d39f9c2b9d5c316725cb48fa3d360c64c663" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.44
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking smallvec v1.9.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crc32fast v1.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking miniz_oxide v0.5.4
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]     Checking libloading v0.7.3
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]     Checking ttf-parser v0.15.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]     Checking dlib v0.5.0
[INFO] [stderr]    Compiling slotmap v1.0.6
[INFO] [stderr]     Checking unicode-bidi v0.3.6
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.44/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a feature with a similar name: `proc_macro_span_file`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout] 92 +     feature(proc_macro_span, proc_macro_span_file)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.78
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking tinyvec v1.4.0
[INFO] [stderr]     Checking flate2 v1.0.24
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]     Checking tracing-core v0.1.29
[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" "4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c", kill_on_drop: false }`
[INFO] [stdout] 4a8acabe583397b966f09e81fbb86c564c864993d205ad157749e5a37d5e4f0c