[INFO] fetching crate pi_weight_task 0.5.1...
[INFO] testing pi_weight_task-0.5.1 against 1.95.0 for beta-1.96-2
[INFO] extracting crate pi_weight_task 0.5.1 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate pi_weight_task 0.5.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate pi_weight_task 0.5.1
[INFO] tweaked toml for crates.io crate pi_weight_task 0.5.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate pi_weight_task 0.5.1 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate pi_weight_task 0.5.1 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pi_slot_wheel v0.3.1
[INFO] [stderr]   Downloaded pi_slot_deque v0.3.1
[INFO] [stderr]   Downloaded pi_wheel v0.1.1
[INFO] [stderr]   Downloaded pi_null v0.1.12
[INFO] [stderr]   Downloaded pi_cancel_timer v0.3.3
[INFO] [stderr]   Downloaded pi_share v0.5.2
[INFO] [stderr]   Downloaded pi_key_alloter v0.6.4
[INFO] [stderr]   Downloaded pi_timer v0.1.1
[INFO] [stderr]   Downloaded pi_ext_heap v0.1.1
[INFO] [stderr]   Downloaded pi_weight v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e97adc0918501fb3518c9365a06ea3ccc40c88dd796069b42e71a4678d8bac4
[INFO] running `Command { std: "docker" "start" "-a" "1e97adc0918501fb3518c9365a06ea3ccc40c88dd796069b42e71a4678d8bac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e97adc0918501fb3518c9365a06ea3ccc40c88dd796069b42e71a4678d8bac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e97adc0918501fb3518c9365a06ea3ccc40c88dd796069b42e71a4678d8bac4", kill_on_drop: false }`
[INFO] [stdout] 1e97adc0918501fb3518c9365a06ea3ccc40c88dd796069b42e71a4678d8bac4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 086171fbe1d64f3003397678c562d96be7d811ca58dde2b63fa9de1028203ce5
[INFO] running `Command { std: "docker" "start" "-a" "086171fbe1d64f3003397678c562d96be7d811ca58dde2b63fa9de1028203ce5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling libc v0.2.183
[INFO] [stderr]    Compiling pi_null v0.1.12
[INFO] [stderr]    Compiling zerocopy v0.8.42
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling pi_slotmap v0.2.1
[INFO] [stderr]    Compiling pi_ext_heap v0.1.1
[INFO] [stderr]    Compiling slotmap v1.1.1
[INFO] [stderr]    Compiling pi_wheel v0.1.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/pi_ext_heap-0.1.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(min_specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pi_ext_heap` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "086171fbe1d64f3003397678c562d96be7d811ca58dde2b63fa9de1028203ce5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "086171fbe1d64f3003397678c562d96be7d811ca58dde2b63fa9de1028203ce5", kill_on_drop: false }`
[INFO] [stdout] 086171fbe1d64f3003397678c562d96be7d811ca58dde2b63fa9de1028203ce5
