[INFO] fetching crate nightly-async-nats 0.27.1...
[INFO] building nightly-async-nats-0.27.1 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate nightly-async-nats 0.27.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate nightly-async-nats 0.27.1
[INFO] finished tweaking crates.io crate nightly-async-nats 0.27.1
[INFO] tweaked toml for crates.io crate nightly-async-nats 0.27.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nightly-async-nats 0.27.1 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nightly-async-nats 0.27.1 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.83
[INFO] [stderr]   Downloaded data-encoding v2.3.3
[INFO] [stderr]   Downloaded pkcs8 v0.7.6
[INFO] [stderr]   Downloaded base64ct v1.1.1
[INFO] [stderr]   Downloaded nuid v0.3.2
[INFO] [stderr]   Downloaded plotters-svg v0.3.3
[INFO] [stderr]   Downloaded der v0.4.5
[INFO] [stderr]   Downloaded serde_nanos v0.1.2
[INFO] [stderr]   Downloaded tokio-retry v0.3.0
[INFO] [stderr]   Downloaded plotters-backend v0.3.4
[INFO] [stderr]   Downloaded zeroize_derive v1.3.3
[INFO] [stderr]   Downloaded futures v0.3.26
[INFO] [stderr]   Downloaded serde_json v1.0.91
[INFO] [stderr]   Downloaded mio v0.8.5
[INFO] [stderr]   Downloaded js-sys v0.3.60
[INFO] [stderr]   Downloaded web-sys v0.3.60
[INFO] [stderr]   Downloaded futures-executor v0.3.26
[INFO] [stderr]   Downloaded unicode-bidi v0.3.10
[INFO] [stderr]   Downloaded time-macros v0.2.6
[INFO] [stderr]   Downloaded proc-macro2 v1.0.50
[INFO] [stderr]   Downloaded security-framework v2.8.2
[INFO] [stderr]   Downloaded time v0.3.17
[INFO] [stderr]   Downloaded parking_lot_core v0.9.6
[INFO] [stderr]   Downloaded const-oid v0.6.2
[INFO] [stderr]   Downloaded nkeys v0.2.0
[INFO] [stderr]   Downloaded plotters v0.3.4
[INFO] [stderr]   Downloaded security-framework-sys v2.8.0
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.83
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.83
[INFO] [stderr]   Downloaded pem-rfc7468 v0.2.4
[INFO] [stderr]   Downloaded spki v0.4.1
[INFO] [stderr]   Downloaded schannel v0.1.21
[INFO] [stderr]   Downloaded signatory v0.23.2
[INFO] [stderr]   Downloaded rustls-native-certs v0.6.2
[INFO] [stderr]   Downloaded subslice v0.2.3
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.83
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.83
[INFO] [stderr]   Downloaded once_cell v1.17.0
[INFO] [stderr]   Downloaded tokio-macros v1.8.2
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 404ad10a44316d6ae607270efb064be714b90ca2d0144f0715ec5041322038d6
[INFO] running `Command { std: "docker" "start" "-a" "404ad10a44316d6ae607270efb064be714b90ca2d0144f0715ec5041322038d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "404ad10a44316d6ae607270efb064be714b90ca2d0144f0715ec5041322038d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "404ad10a44316d6ae607270efb064be714b90ca2d0144f0715ec5041322038d6", kill_on_drop: false }`
[INFO] [stdout] 404ad10a44316d6ae607270efb064be714b90ca2d0144f0715ec5041322038d6
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bd68ec912a497958fa60e71bb34ca97c60ca40c5ce2aa80104331086b5b1c78
[INFO] running `Command { std: "docker" "start" "-a" "6bd68ec912a497958fa60e71bb34ca97c60ca40c5ce2aa80104331086b5b1c78", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[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] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling futures-core v0.3.26
[INFO] [stderr]    Compiling parking_lot_core v0.9.6
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling const-oid v0.6.2
[INFO] [stderr]    Compiling futures-channel v0.3.26
[INFO] [stderr]    Compiling futures-task v0.3.26
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling tokio v1.25.0
[INFO] [stderr]    Compiling futures-sink v0.3.26
[INFO] [stderr]    Compiling futures-util v0.3.26
[INFO] [stderr]    Compiling bytes v1.4.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.50/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 der v0.4.5
[INFO] [stderr]    Compiling base64ct v1.1.1
[INFO] [stderr]    Compiling signature v1.6.4
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling rustls v0.20.8
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling pem-rfc7468 v0.2.4
[INFO] [stderr]    Compiling futures-io v0.3.26
[INFO] [stderr]    Compiling cpufeatures v0.2.5
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling opaque-debug 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" "6bd68ec912a497958fa60e71bb34ca97c60ca40c5ce2aa80104331086b5b1c78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bd68ec912a497958fa60e71bb34ca97c60ca40c5ce2aa80104331086b5b1c78", kill_on_drop: false }`
[INFO] [stdout] 6bd68ec912a497958fa60e71bb34ca97c60ca40c5ce2aa80104331086b5b1c78