[INFO] fetching crate arenta 1.0.2...
[INFO] testing arenta-1.0.2 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate arenta 1.0.2 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate arenta 1.0.2
[INFO] finished tweaking crates.io crate arenta 1.0.2
[INFO] tweaked toml for crates.io crate arenta 1.0.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate arenta 1.0.2 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate arenta 1.0.2 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dyn-clone v1.0.10
[INFO] [stderr]   Downloaded parking_lot_core v0.9.6
[INFO] [stderr]   Downloaded newline-converter v0.2.2
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.87
[INFO] [stderr]   Downloaded inquire v0.5.3
[INFO] [stderr]   Downloaded crossterm_winapi v0.9.0
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.87
[INFO] [stderr]   Downloaded serde v1.0.152
[INFO] [stderr]   Downloaded cxx-build v1.0.87
[INFO] [stderr]   Downloaded proc-macro2 v1.0.50
[INFO] [stderr]   Downloaded cxx v1.0.87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 721ed0d2bcaadb0b80255de78267d36a3ab4d6862cb1271ffe0456a0a6028227
[INFO] running `Command { std: "docker" "start" "-a" "721ed0d2bcaadb0b80255de78267d36a3ab4d6862cb1271ffe0456a0a6028227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "721ed0d2bcaadb0b80255de78267d36a3ab4d6862cb1271ffe0456a0a6028227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "721ed0d2bcaadb0b80255de78267d36a3ab4d6862cb1271ffe0456a0a6028227", kill_on_drop: false }`
[INFO] [stdout] 721ed0d2bcaadb0b80255de78267d36a3ab4d6862cb1271ffe0456a0a6028227
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d906d4c0cea6c5c092e4baa64c2c66bcbfddf937f61c3c64782fb1d7a5fb8e5c
[INFO] running `Command { std: "docker" "start" "-a" "d906d4c0cea6c5c092e4baa64c2c66bcbfddf937f61c3c64782fb1d7a5fb8e5c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling parking_lot_core v0.9.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling unicode-segmentation v1.10.0
[INFO] [stderr]    Compiling iana-time-zone v0.1.53
[INFO] [stderr]    Compiling dyn-clone v1.0.10
[INFO] [stderr]    Compiling newline-converter v0.2.2
[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 signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling mio v0.8.5
[INFO] [stderr]    Compiling time v0.1.45
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling dirs v4.0.0
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling parking_lot v0.12.1
[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" "d906d4c0cea6c5c092e4baa64c2c66bcbfddf937f61c3c64782fb1d7a5fb8e5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d906d4c0cea6c5c092e4baa64c2c66bcbfddf937f61c3c64782fb1d7a5fb8e5c", kill_on_drop: false }`
[INFO] [stdout] d906d4c0cea6c5c092e4baa64c2c66bcbfddf937f61c3c64782fb1d7a5fb8e5c
