[INFO] fetching crate nitrogen-lib 0.2.1...
[INFO] testing nitrogen-lib-0.2.1 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate nitrogen-lib 0.2.1 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate nitrogen-lib 0.2.1
[INFO] finished tweaking crates.io crate nitrogen-lib 0.2.1
[INFO] tweaked toml for crates.io crate nitrogen-lib 0.2.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nitrogen-lib 0.2.1 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nitrogen-lib 0.2.1 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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bytes v1.2.1
[INFO] [stderr]   Downloaded tokio-macros v1.8.0
[INFO] [stderr]   Downloaded futures-channel v0.3.25
[INFO] [stderr]   Downloaded sct v0.6.1
[INFO] [stderr]   Downloaded parking_lot_core v0.9.4
[INFO] [stderr]   Downloaded rust-embed-utils v7.3.0
[INFO] [stderr]   Downloaded clap_derive v4.0.18
[INFO] [stderr]   Downloaded miniz_oxide v0.5.4
[INFO] [stderr]   Downloaded aws-smithy-query v0.49.0
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[INFO] [stderr]   Downloaded aws-smithy-json v0.49.0
[INFO] [stderr]   Downloaded aws-sdk-sso v0.19.0
[INFO] [stderr]   Downloaded security-framework v2.7.0
[INFO] [stderr]   Downloaded serde v1.0.147
[INFO] [stderr]   Downloaded time v0.3.16
[INFO] [stderr]   Downloaded h2 v0.3.15
[INFO] [stderr]   Downloaded hyper v0.14.20
[INFO] [stderr]   Downloaded aws-smithy-types v0.49.0
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[INFO] [stderr]   Downloaded aws-sdk-cloudformation v0.19.0
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[INFO] [stderr]   Downloaded hyper-rustls v0.22.1
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[INFO] [stderr]   Downloaded failure_derive v0.1.8
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[INFO] [stderr]   Downloaded tokio-rustls v0.22.0
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[INFO] [stderr]   Downloaded zeroize v1.5.7
[INFO] [stderr]   Downloaded futures-task v0.3.25
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[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d8076739993d1bed2b11aa42da40e9aae8edead1c787c90e5eb6d9a619e8788
[INFO] running `Command { std: "docker" "start" "-a" "0d8076739993d1bed2b11aa42da40e9aae8edead1c787c90e5eb6d9a619e8788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d8076739993d1bed2b11aa42da40e9aae8edead1c787c90e5eb6d9a619e8788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d8076739993d1bed2b11aa42da40e9aae8edead1c787c90e5eb6d9a619e8788", kill_on_drop: false }`
[INFO] [stdout] 0d8076739993d1bed2b11aa42da40e9aae8edead1c787c90e5eb6d9a619e8788
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ffdd43a8011ed5bc6128cc3c91175222b3b3c10ac6bd094459b6cdf80dcbe4e
[INFO] running `Command { std: "docker" "start" "-a" "1ffdd43a8011ed5bc6128cc3c91175222b3b3c10ac6bd094459b6cdf80dcbe4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling once_cell v1.15.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling time-core v0.1.0
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling futures-sink v0.3.25
[INFO] [stderr]    Compiling num_threads v0.1.6
[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 httparse v1.8.0
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling http v0.2.8
[INFO] [stderr]    Compiling tower-service v0.3.2
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stderr]    Compiling httpdate v1.0.2
[INFO] [stderr]    Compiling percent-encoding v2.2.0
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling semver v1.0.14
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[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" "1ffdd43a8011ed5bc6128cc3c91175222b3b3c10ac6bd094459b6cdf80dcbe4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ffdd43a8011ed5bc6128cc3c91175222b3b3c10ac6bd094459b6cdf80dcbe4e", kill_on_drop: false }`
[INFO] [stdout] 1ffdd43a8011ed5bc6128cc3c91175222b3b3c10ac6bd094459b6cdf80dcbe4e