[INFO] fetching crate modality-mutator-server 0.1.0...
[INFO] checking modality-mutator-server-0.1.0 against master#6162f6f12339aa81fe16b8a64644ead497e411b2 for pr-113240
[INFO] extracting crate modality-mutator-server 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate modality-mutator-server 0.1.0 on toolchain 6162f6f12339aa81fe16b8a64644ead497e411b2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate modality-mutator-server 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate modality-mutator-server 0.1.0
[INFO] tweaked toml for crates.io crate modality-mutator-server 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate modality-mutator-server 0.1.0 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" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zip v0.6.3
[INFO] [stderr]   Downloaded os_str_bytes v6.4.1
[INFO] [stderr]   Downloaded errno v0.2.8
[INFO] [stderr]   Downloaded walkdir v2.3.2
[INFO] [stderr]   Downloaded async-trait v0.1.60
[INFO] [stderr]   Downloaded rust-embed-utils v7.3.0
[INFO] [stderr]   Downloaded rust-embed-impl v6.3.1
[INFO] [stderr]   Downloaded is-terminal v0.4.2
[INFO] [stderr]   Downloaded exitcode v1.1.2
[INFO] [stderr]   Downloaded duplicate v0.4.1
[INFO] [stderr]   Downloaded minicbor-derive v0.8.0
[INFO] [stderr]   Downloaded utoipa v2.4.2
[INFO] [stderr]   Downloaded utoipa-gen v2.4.2
[INFO] [stderr]   Downloaded nix v0.25.1
[INFO] [stderr]   Downloaded rust-embed v6.4.2
[INFO] [stderr]   Downloaded utoipa-swagger-ui v3.0.1
[INFO] [stderr]   Downloaded rustix v0.36.6
[INFO] [stderr]   Downloaded io-lifetimes v1.0.3
[INFO] [stderr]   Downloaded axum v0.6.1
[INFO] [stderr]   Downloaded minicbor v0.13.2
[INFO] [stderr]   Downloaded tracing-modality v0.2.1
[INFO] [stderr]   Downloaded modality-ingest-client v0.2.1
[INFO] [stderr]   Downloaded modality-reflector-config v0.2.0
[INFO] [stderr]   Downloaded modality-auth-token v0.1.0
[INFO] [stderr]   Downloaded ordered-float v2.10.0
[INFO] [stderr]   Downloaded modality-api v0.1.1
[INFO] [stderr]   Downloaded serde_path_to_error v0.1.9
[INFO] [stderr]   Downloaded modality-mutator-protocol v0.1.0
[INFO] [stderr]   Downloaded modality-ingest-protocol v0.1.0
[INFO] [stderr]   Downloaded modality-plugin-utils v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3842d85bd0b4876bf0cabf9afb63256d8561fb51654aa802f20541b086f7760e
[INFO] running `Command { std: "docker" "start" "-a" "3842d85bd0b4876bf0cabf9afb63256d8561fb51654aa802f20541b086f7760e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3842d85bd0b4876bf0cabf9afb63256d8561fb51654aa802f20541b086f7760e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3842d85bd0b4876bf0cabf9afb63256d8561fb51654aa802f20541b086f7760e", kill_on_drop: false }`
[INFO] [stdout] 3842d85bd0b4876bf0cabf9afb63256d8561fb51654aa802f20541b086f7760e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 030e44884f78e6329e8e3b0307761f2dc36302c897d6b34cac32eea2934b3c6d
[INFO] running `Command { std: "docker" "start" "-a" "030e44884f78e6329e8e3b0307761f2dc36302c897d6b34cac32eea2934b3c6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling tokio v1.24.1
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling openssl v0.10.45
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.49/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 slab v0.4.7
[INFO] [stderr]     Checking futures-task v0.3.25
[INFO] [stdout] error: aborting due to 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" "030e44884f78e6329e8e3b0307761f2dc36302c897d6b34cac32eea2934b3c6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "030e44884f78e6329e8e3b0307761f2dc36302c897d6b34cac32eea2934b3c6d", kill_on_drop: false }`
[INFO] [stdout] 030e44884f78e6329e8e3b0307761f2dc36302c897d6b34cac32eea2934b3c6d