[INFO] fetching crate ratmom 0.1.0...
[INFO] building ratmom-0.1.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate ratmom 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate ratmom 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ratmom 0.1.0
[INFO] tweaked toml for crates.io crate ratmom 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ratmom 0.1.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ratmom 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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded test-case-macros v2.2.2
[INFO] [stderr]   Downloaded thread_local v1.1.4
[INFO] [stderr]   Downloaded concurrent-queue v2.0.0
[INFO] [stderr]   Downloaded test-case v2.2.2
[INFO] [stderr]   Downloaded proc-macro-crate v1.2.1
[INFO] [stderr]   Downloaded rustls-native-certs v0.6.2
[INFO] [stderr]   Downloaded unicode-segmentation v1.10.0
[INFO] [stderr]   Downloaded rustversion v1.0.11
[INFO] [stderr]   Downloaded polling v2.5.2
[INFO] [stderr]   Downloaded castaway v0.2.2
[INFO] [stderr]   Downloaded console v0.15.4
[INFO] [stderr]   Downloaded num_enum v0.5.7
[INFO] [stderr]   Downloaded data-encoding v2.3.3
[INFO] [stderr]   Downloaded publicsuffix v2.2.3
[INFO] [stderr]   Downloaded webpki v0.22.0
[INFO] [stderr]   Downloaded bumpalo v3.11.1
[INFO] [stderr]   Downloaded rayon-core v1.10.1
[INFO] [stderr]   Downloaded ratcurl v0.1.0
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.16
[INFO] [stderr]   Downloaded indicatif v0.15.0
[INFO] [stderr]   Downloaded toml v0.5.10
[INFO] [stderr]   Downloaded rayon v1.6.1
[INFO] [stderr]   Downloaded sct v0.7.0
[INFO] [stderr]   Downloaded regex v1.7.0
[INFO] [stderr]   Downloaded rustls-pemfile v1.0.1
[INFO] [stderr]   Downloaded number_prefix v0.3.0
[INFO] [stderr]   Downloaded rustls v0.20.7
[INFO] [stderr]   Downloaded windows_aarch64_gnullvm v0.42.0
[INFO] [stderr]   Downloaded num_enum_derive v0.5.7
[INFO] [stderr]   Downloaded rustls-pemfile v0.2.1
[INFO] [stderr]   Downloaded rustls-ffi v0.8.2
[INFO] [stderr]   Downloaded windows_x86_64_gnullvm v0.42.0
[INFO] [stderr]   Downloaded ratcurl-sys v0.1.0+curl-7.86.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.49
[INFO] [stderr]   Downloaded tracing-attributes v0.1.23
[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.42.0
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.42.0
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.42.0
[INFO] [stderr]   Downloaded windows_i686_gnu v0.42.0
[INFO] [stderr]   Downloaded windows_i686_msvc v0.42.0
[INFO] [stderr]   Downloaded libnghttp2-sys v0.1.7+1.45.0
[INFO] [stderr]   Downloaded openssl-src v111.24.0+1.1.1s
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4885af90e911a906545ca7234304261cae61fade56e4d2f717b22c1a792a3c20
[INFO] running `Command { std: "docker" "start" "-a" "4885af90e911a906545ca7234304261cae61fade56e4d2f717b22c1a792a3c20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4885af90e911a906545ca7234304261cae61fade56e4d2f717b22c1a792a3c20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4885af90e911a906545ca7234304261cae61fade56e4d2f717b22c1a792a3c20", kill_on_drop: false }`
[INFO] [stdout] 4885af90e911a906545ca7234304261cae61fade56e4d2f717b22c1a792a3c20
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bdfb1460e14d8a1591a665c32757f38aed204e62ebf4daf721c0b7b2bd8a282
[INFO] running `Command { std: "docker" "start" "-a" "2bdfb1460e14d8a1591a665c32757f38aed204e62ebf4daf721c0b7b2bd8a282", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling once_cell v1.17.0
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.49/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]    Compiling rustversion v1.0.11
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling polling v2.5.2
[INFO] [stderr]    Compiling concurrent-queue v2.0.0
[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" "2bdfb1460e14d8a1591a665c32757f38aed204e62ebf4daf721c0b7b2bd8a282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bdfb1460e14d8a1591a665c32757f38aed204e62ebf4daf721c0b7b2bd8a282", kill_on_drop: false }`
[INFO] [stdout] 2bdfb1460e14d8a1591a665c32757f38aed204e62ebf4daf721c0b7b2bd8a282