[INFO] fetching crate etcd-rs 1.0.1...
[INFO] testing etcd-rs-1.0.1 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate etcd-rs 1.0.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate etcd-rs 1.0.1
[INFO] finished tweaking crates.io crate etcd-rs 1.0.1
[INFO] tweaked toml for crates.io crate etcd-rs 1.0.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate etcd-rs 1.0.1 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate etcd-rs 1.0.1 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 909de61c4fd7d50550e9f1c6047f9a6433841a4c886bd17c9aa0a2529ad00a8f
[INFO] running `Command { std: "docker" "start" "-a" "909de61c4fd7d50550e9f1c6047f9a6433841a4c886bd17c9aa0a2529ad00a8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "909de61c4fd7d50550e9f1c6047f9a6433841a4c886bd17c9aa0a2529ad00a8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "909de61c4fd7d50550e9f1c6047f9a6433841a4c886bd17c9aa0a2529ad00a8f", kill_on_drop: false }`
[INFO] [stdout] 909de61c4fd7d50550e9f1c6047f9a6433841a4c886bd17c9aa0a2529ad00a8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce88c73fffbeecf1f62a669cd549d9caf49a29dec208882472925aa798425eca
[INFO] running `Command { std: "docker" "start" "-a" "ce88c73fffbeecf1f62a669cd549d9caf49a29dec208882472925aa798425eca", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling once_cell v1.13.1
[INFO] [stderr]    Compiling tokio v1.27.0
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling anyhow v1.0.62
[INFO] [stderr]    Compiling rustversion v1.0.12
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling itoa v1.0.6
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling prettyplease v0.1.18
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling tracing-core v0.1.29
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling http v0.2.9
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling async-trait v0.1.68
[INFO] [stderr]    Compiling regex-syntax v0.6.27
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling fixedbitset v0.4.2
[INFO] [stderr]    Compiling try-lock v0.2.3
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]    Compiling rustls v0.21.0
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/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 mio v0.8.4
[INFO] [stderr]    Compiling socket2 v0.4.9
[INFO] [stderr]    Compiling getrandom v0.2.7
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling which v4.2.5
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling httpdate v1.0.2
[INFO] [stderr]    Compiling multimap v0.8.3
[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" "ce88c73fffbeecf1f62a669cd549d9caf49a29dec208882472925aa798425eca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce88c73fffbeecf1f62a669cd549d9caf49a29dec208882472925aa798425eca", kill_on_drop: false }`
[INFO] [stdout] ce88c73fffbeecf1f62a669cd549d9caf49a29dec208882472925aa798425eca