[INFO] fetching crate oberon 2.2.1...
[INFO] checking oberon-2.2.1 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate oberon 2.2.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate oberon 2.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate oberon 2.2.1
[INFO] tweaked toml for crates.io crate oberon 2.2.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate oberon 2.2.1 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate oberon 2.2.1 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 23491c0905dcce2652508c717cc29794069d70b37eb528b30c5b5966a423c05a
[INFO] running `Command { std: "docker" "start" "-a" "23491c0905dcce2652508c717cc29794069d70b37eb528b30c5b5966a423c05a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "23491c0905dcce2652508c717cc29794069d70b37eb528b30c5b5966a423c05a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23491c0905dcce2652508c717cc29794069d70b37eb528b30c5b5966a423c05a", kill_on_drop: false }`
[INFO] [stdout] 23491c0905dcce2652508c717cc29794069d70b37eb528b30c5b5966a423c05a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e9002663e8b56804d16eff79db09524a413dd38594ff351c2829c1507c9f242
[INFO] running `Command { std: "docker" "start" "-a" "7e9002663e8b56804d16eff79db09524a413dd38594ff351c2829c1507c9f242", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.145
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.59/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 num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling packed_simd_2 v0.3.8
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]     Checking base16ct v0.2.0
[INFO] [stderr]     Checking anstyle v1.0.0
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]     Checking clap_lex v0.5.0
[INFO] [stderr]     Checking ciborium-ll v0.2.1
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking keccak v0.1.4
[INFO] [stderr]     Checking cpufeatures v0.2.7
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking plotters-svg v0.3.3
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking arrayref v0.3.7
[INFO] [stderr]     Checking cast v0.3.0
[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" "7e9002663e8b56804d16eff79db09524a413dd38594ff351c2829c1507c9f242", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e9002663e8b56804d16eff79db09524a413dd38594ff351c2829c1507c9f242", kill_on_drop: false }`
[INFO] [stdout] 7e9002663e8b56804d16eff79db09524a413dd38594ff351c2829c1507c9f242