[INFO] fetching crate composable-allocators 0.3.5...
[INFO] checking composable-allocators-0.3.5 against try#88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c for pr-154887
[INFO] extracting crate composable-allocators 0.3.5 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate composable-allocators 0.3.5
[INFO] finished tweaking crates.io crate composable-allocators 0.3.5
[INFO] tweaked toml for crates.io crate composable-allocators 0.3.5 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate composable-allocators 0.3.5 on toolchain 88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate composable-allocators 0.3.5 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" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6ad7490c96966e554470a307884473d5f959e8b4d868b719aac236e91d09836f
[INFO] running `Command { std: "docker" "start" "-a" "6ad7490c96966e554470a307884473d5f959e8b4d868b719aac236e91d09836f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ad7490c96966e554470a307884473d5f959e8b4d868b719aac236e91d09836f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ad7490c96966e554470a307884473d5f959e8b4d868b719aac236e91d09836f", kill_on_drop: false }`
[INFO] [stdout] 6ad7490c96966e554470a307884473d5f959e8b4d868b719aac236e91d09836f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 372beb5f82a08bcb1529a4a94f7abbd73c6333fe21591107df591706aabd4da3
[INFO] running `Command { std: "docker" "start" "-a" "372beb5f82a08bcb1529a4a94f7abbd73c6333fe21591107df591706aabd4da3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking const-default v1.0.0
[INFO] [stderr]    Compiling errno-sys v0.2.0
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]     Checking panicking v0.5.0
[INFO] [stderr]     Checking sync-no-std v0.1.4
[INFO] [stderr]     Checking errno-no-std v0.2.2
[INFO] [stderr]     Checking print-no-std v0.3.0
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling const-default-derive v0.2.0
[INFO] [stderr]     Checking composable-allocators v0.3.5 (/opt/rustwide/workdir)
[INFO] [stdout] error: the feature `never_type` has been stable since 1.96.0-nightly and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(never_type)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![deny(warnings)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(stable_features)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the feature `never_type` has been stable since 1.96.0-nightly and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(never_type)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![deny(warnings)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(stable_features)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `composable-allocators` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `composable-allocators` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "372beb5f82a08bcb1529a4a94f7abbd73c6333fe21591107df591706aabd4da3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "372beb5f82a08bcb1529a4a94f7abbd73c6333fe21591107df591706aabd4da3", kill_on_drop: false }`
[INFO] [stdout] 372beb5f82a08bcb1529a4a94f7abbd73c6333fe21591107df591706aabd4da3