[INFO] fetching crate talc 3.1.2...
[INFO] testing talc-3.1.2 against 1.75.0 for beta-1.76-1
[INFO] extracting crate talc 3.1.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate talc 3.1.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate talc 3.1.2
[INFO] finished tweaking crates.io crate talc 3.1.2
[INFO] tweaked toml for crates.io crate talc 3.1.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate talc 3.1.2 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dlmalloc v0.2.4
[INFO] [stderr]   Downloaded talc v2.2.2
[INFO] [stderr]   Downloaded buddy-alloc v0.5.1
[INFO] [stderr]   Downloaded linked_list_allocator v0.10.5
[INFO] [stderr]   Downloaded good_memory_allocator v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3932332e891c4685408f408e44d008cd773cda035d650cd2e4d6083d8cdeced1
[INFO] running `Command { std: "docker" "start" "-a" "3932332e891c4685408f408e44d008cd773cda035d650cd2e4d6083d8cdeced1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3932332e891c4685408f408e44d008cd773cda035d650cd2e4d6083d8cdeced1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3932332e891c4685408f408e44d008cd773cda035d650cd2e4d6083d8cdeced1", kill_on_drop: false }`
[INFO] [stdout] 3932332e891c4685408f408e44d008cd773cda035d650cd2e4d6083d8cdeced1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 771333b56f2b3dd228729acd505f7218a25691cc0340eb0532afb5ff38102ed8
[INFO] running `Command { std: "docker" "start" "-a" "771333b56f2b3dd228729acd505f7218a25691cc0340eb0532afb5ff38102ed8", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling talc v3.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:8:44
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![cfg_attr(feature = "allocator", feature(allocator_api))]
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:46
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![cfg_attr(feature = "nightly_api", feature(slice_ptr_len))]
[INFO] [stdout]   |                                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:46
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![cfg_attr(feature = "nightly_api", feature(const_slice_ptr_len))]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `talc` (lib) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "771333b56f2b3dd228729acd505f7218a25691cc0340eb0532afb5ff38102ed8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "771333b56f2b3dd228729acd505f7218a25691cc0340eb0532afb5ff38102ed8", kill_on_drop: false }`
[INFO] [stdout] 771333b56f2b3dd228729acd505f7218a25691cc0340eb0532afb5ff38102ed8
