[INFO] fetching crate printnanny-snapshot 0.1.1...
[INFO] building printnanny-snapshot-0.1.1 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate printnanny-snapshot 0.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate printnanny-snapshot 0.1.1
[INFO] finished tweaking crates.io crate printnanny-snapshot 0.1.1
[INFO] tweaked toml for crates.io crate printnanny-snapshot 0.1.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate printnanny-snapshot 0.1.1 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 printnanny-snapshot 0.1.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] [stderr]   Downloaded zstd-sys v2.0.7+zstd.1.5.4
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[INFO] [stderr]   Downloaded printnanny-asyncapi-models v0.4.7
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[INFO] [stderr]   Downloaded atomic-waker v1.1.0
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[INFO] [stderr]   Downloaded printnanny-dbus v0.5.1
[INFO] [stderr]   Downloaded zip v0.6.4
[INFO] [stderr]   Downloaded printnanny-settings v0.7.1
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 9cfe45c3289cc878962e349a4ec661d7cf59092c42d600454fd8d94ee100f072
[INFO] running `Command { std: "docker" "start" "-a" "9cfe45c3289cc878962e349a4ec661d7cf59092c42d600454fd8d94ee100f072", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cfe45c3289cc878962e349a4ec661d7cf59092c42d600454fd8d94ee100f072", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cfe45c3289cc878962e349a4ec661d7cf59092c42d600454fd8d94ee100f072", kill_on_drop: false }`
[INFO] [stdout] 9cfe45c3289cc878962e349a4ec661d7cf59092c42d600454fd8d94ee100f072
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] ede9c454462fa172b8e578a473bb8dd6ba6e133bfa04c7a02fdd02c2fb16a724
[INFO] running `Command { std: "docker" "start" "-a" "ede9c454462fa172b8e578a473bb8dd6ba6e133bfa04c7a02fdd02c2fb16a724", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_derive v1.0.153
[INFO] [stderr]    Compiling serde v1.0.153
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling futures-core v0.3.26
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling futures-io v0.3.26
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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 itoa v1.0.6
[INFO] [stderr]    Compiling futures-sink v0.3.26
[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" "ede9c454462fa172b8e578a473bb8dd6ba6e133bfa04c7a02fdd02c2fb16a724", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ede9c454462fa172b8e578a473bb8dd6ba6e133bfa04c7a02fdd02c2fb16a724", kill_on_drop: false }`
[INFO] [stdout] ede9c454462fa172b8e578a473bb8dd6ba6e133bfa04c7a02fdd02c2fb16a724