[INFO] fetching crate lowestbins 1.4.1...
[INFO] testing lowestbins-1.4.1 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate lowestbins 1.4.1 into /workspace/builds/worker-2-tc1/source
[INFO] removed /workspace/builds/worker-2-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate lowestbins 1.4.1
[INFO] finished tweaking crates.io crate lowestbins 1.4.1
[INFO] tweaked toml for crates.io crate lowestbins 1.4.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate lowestbins 1.4.1 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate lowestbins 1.4.1 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mimalloc v0.1.30
[INFO] [stderr]   Downloaded ctrlc v3.2.3
[INFO] [stderr]   Downloaded value-trait v0.4.0
[INFO] [stderr]   Downloaded halfbrown v0.1.15
[INFO] [stderr]   Downloaded simd-json v0.6.0
[INFO] [stderr]   Downloaded libmimalloc-sys v0.1.26
[INFO] [stderr]   Downloaded curl-sys v0.4.59+curl-7.86.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f8a4ad4e3cceafa2459cc62d365260da8bb4831d20ec36b855d7cf5cd3f7ccd
[INFO] running `Command { std: "docker" "start" "-a" "0f8a4ad4e3cceafa2459cc62d365260da8bb4831d20ec36b855d7cf5cd3f7ccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f8a4ad4e3cceafa2459cc62d365260da8bb4831d20ec36b855d7cf5cd3f7ccd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f8a4ad4e3cceafa2459cc62d365260da8bb4831d20ec36b855d7cf5cd3f7ccd", kill_on_drop: false }`
[INFO] [stdout] 0f8a4ad4e3cceafa2459cc62d365260da8bb4831d20ec36b855d7cf5cd3f7ccd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac3265456eaf04e3bde1b05d9a945ec9e94b55367c6f65c89badab9666747a7b
[INFO] running `Command { std: "docker" "start" "-a" "ac3265456eaf04e3bde1b05d9a945ec9e94b55367c6f65c89badab9666747a7b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling cc v1.0.74
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling serde_derive v1.0.147
[INFO] [stderr]    Compiling serde v1.0.147
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling serde_json v1.0.87
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling miniz_oxide v0.5.4
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling http v0.2.8
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling paste v1.0.9
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling cache-padded v1.2.0
[INFO] [stderr]    Compiling concurrent-queue v1.2.4
[INFO] [stderr]    Compiling polling v2.4.0
[INFO] [stderr]    Compiling futures-io v0.3.25
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/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 unicode-bidi v0.3.8
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]    Compiling curl v0.4.44
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling gimli v0.26.2
[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" "ac3265456eaf04e3bde1b05d9a945ec9e94b55367c6f65c89badab9666747a7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac3265456eaf04e3bde1b05d9a945ec9e94b55367c6f65c89badab9666747a7b", kill_on_drop: false }`
[INFO] [stdout] ac3265456eaf04e3bde1b05d9a945ec9e94b55367c6f65c89badab9666747a7b