[INFO] fetching crate futures_ringbuf 0.4.0...
[INFO] checking futures_ringbuf-0.4.0 against master#191df20fcad9331d3a948aa8e8556775ec3fe69d for pr-133502-3
[INFO] extracting crate futures_ringbuf 0.4.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate futures_ringbuf 0.4.0 on toolchain 191df20fcad9331d3a948aa8e8556775ec3fe69d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+191df20fcad9331d3a948aa8e8556775ec3fe69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures_ringbuf 0.4.0
[INFO] finished tweaking crates.io crate futures_ringbuf 0.4.0
[INFO] tweaked toml for crates.io crate futures_ringbuf 0.4.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate futures_ringbuf 0.4.0 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" "+191df20fcad9331d3a948aa8e8556775ec3fe69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.86
[INFO] [stderr]   Downloaded proc-macro2 v1.0.59
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.36
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.36
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.86
[INFO] [stderr]   Downloaded quote v1.0.28
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.86
[INFO] [stderr]   Downloaded async-attributes v1.1.2
[INFO] [stderr]   Downloaded async-channel v1.8.0
[INFO] [stderr]   Downloaded async-global-executor v2.3.1
[INFO] [stderr]   Downloaded futures v0.3.28
[INFO] [stderr]   Downloaded rustix v0.37.19
[INFO] [stderr]   Downloaded pin-project-lite v0.2.9
[INFO] [stderr]   Downloaded tracing-core v0.1.31
[INFO] [stderr]   Downloaded tracing v0.1.37
[INFO] [stderr]   Downloaded js-sys v0.3.63
[INFO] [stderr]   Downloaded log v0.4.18
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.86
[INFO] [stderr]   Downloaded pretty_assertions v1.3.0
[INFO] [stderr]   Downloaded tokio-util v0.7.8
[INFO] [stderr]   Downloaded syn v2.0.18
[INFO] [stderr]   Downloaded errno v0.3.1
[INFO] [stderr]   Downloaded async-std v1.12.0
[INFO] [stderr]   Downloaded libc v0.2.144
[INFO] [stderr]   Downloaded async-io v1.13.0
[INFO] [stderr]   Downloaded slab v0.4.8
[INFO] [stderr]   Downloaded pin-project v1.1.0
[INFO] [stderr]   Downloaded ringbuf v0.3.3
[INFO] [stderr]   Downloaded value-bag v1.4.0
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.86
[INFO] [stderr]   Downloaded futures-lite v1.13.0
[INFO] [stderr]   Downloaded ergo-pin v0.1.0
[INFO] [stderr]   Downloaded tokio v1.28.2
[INFO] [stderr]   Downloaded futures-macro v0.3.28
[INFO] [stderr]   Downloaded pin-project-internal v1.1.0
[INFO] [stderr]   Downloaded futures-test v0.3.28
[INFO] [stderr]   Downloaded ctor v0.1.26
[INFO] [stderr]   Downloaded output_vt100 v0.1.3
[INFO] [stderr]   Downloaded getrandom v0.2.9
[INFO] [stderr]   Downloaded semver v1.0.17
[INFO] [stderr]   Downloaded futures-io v0.3.28
[INFO] [stderr]   Downloaded async-executor v1.5.1
[INFO] [stderr]   Downloaded async-task v4.4.0
[INFO] [stderr]   Downloaded blocking v1.3.1
[INFO] [stderr]   Downloaded concurrent-queue v2.2.0
[INFO] [stderr]   Downloaded polling v2.8.0
[INFO] [stderr]   Downloaded hermit-abi v0.3.1
[INFO] [stderr]   Downloaded async-lock v2.7.0
[INFO] [stderr]   Downloaded parking v2.1.0
[INFO] [stderr]   Downloaded waker-fn v1.1.0
[INFO] [stderr]   Downloaded kv-log-macro v1.0.7
[INFO] [stderr]   Downloaded asynchronous-codec v0.6.1
[INFO] [stderr]   Downloaded futures-executor v0.3.28
[INFO] [stderr]   Downloaded web-sys v0.3.63
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+191df20fcad9331d3a948aa8e8556775ec3fe69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f3485ec1e2dbef35ca44fba061f95d3d10435a6d46c75c215d3279ba805927f
[INFO] running `Command { std: "docker" "start" "-a" "3f3485ec1e2dbef35ca44fba061f95d3d10435a6d46c75c215d3279ba805927f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f3485ec1e2dbef35ca44fba061f95d3d10435a6d46c75c215d3279ba805927f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f3485ec1e2dbef35ca44fba061f95d3d10435a6d46c75c215d3279ba805927f", kill_on_drop: false }`
[INFO] [stdout] 3f3485ec1e2dbef35ca44fba061f95d3d10435a6d46c75c215d3279ba805927f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+191df20fcad9331d3a948aa8e8556775ec3fe69d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1ba319ec88f320a5d49f52c15164fde529f472f95a82e327dbd0746d25d0b25
[INFO] running `Command { std: "docker" "start" "-a" "b1ba319ec88f320a5d49f52c15164fde529f472f95a82e327dbd0746d25d0b25", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]     Checking value-bag v1.4.0
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]    Compiling futures-util v0.3.28
[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 slab v0.4.8
[INFO] [stderr]     Checking concurrent-queue v2.2.0
[INFO] [stderr]    Compiling semver v1.0.17
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]     Checking parking v2.1.0
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking waker-fn v1.1.0
[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" "b1ba319ec88f320a5d49f52c15164fde529f472f95a82e327dbd0746d25d0b25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1ba319ec88f320a5d49f52c15164fde529f472f95a82e327dbd0746d25d0b25", kill_on_drop: false }`
[INFO] [stdout] b1ba319ec88f320a5d49f52c15164fde529f472f95a82e327dbd0746d25d0b25