[INFO] fetching crate talc 4.4.3...
[INFO] testing talc-4.4.3 against 1.90.0 for beta-1.91-3
[INFO] extracting crate talc 4.4.3 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate talc 4.4.3
[INFO] finished tweaking crates.io crate talc 4.4.3
[INFO] tweaked toml for crates.io crate talc 4.4.3 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate talc 4.4.3 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate talc 4.4.3 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded spin v0.9.8
[INFO] [stderr]   Downloaded lock_api v0.4.13
[INFO] [stderr]   Downloaded allocator-api2 v0.2.21
[INFO] [stderr]   Downloaded autocfg v1.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ff89bc700f4dc48dec2d8c0078f1ebbb4e2da98060921d131ad210d6ad78bac
[INFO] running `Command { std: "docker" "start" "-a" "0ff89bc700f4dc48dec2d8c0078f1ebbb4e2da98060921d131ad210d6ad78bac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ff89bc700f4dc48dec2d8c0078f1ebbb4e2da98060921d131ad210d6ad78bac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ff89bc700f4dc48dec2d8c0078f1ebbb4e2da98060921d131ad210d6ad78bac", kill_on_drop: false }`
[INFO] [stdout] 0ff89bc700f4dc48dec2d8c0078f1ebbb4e2da98060921d131ad210d6ad78bac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49599a1f5176d350fbfa2c630a0eb0c49f33687044f5d3fd545ce69fe4b03cec
[INFO] running `Command { std: "docker" "start" "-a" "49599a1f5176d350fbfa2c630a0eb0c49f33687044f5d3fd545ce69fe4b03cec", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling lock_api v0.4.13
[INFO] [stderr]    Compiling talc v4.4.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:36
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature = "allocator", feature(allocator_api))]
[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 `talc` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "49599a1f5176d350fbfa2c630a0eb0c49f33687044f5d3fd545ce69fe4b03cec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49599a1f5176d350fbfa2c630a0eb0c49f33687044f5d3fd545ce69fe4b03cec", kill_on_drop: false }`
[INFO] [stdout] 49599a1f5176d350fbfa2c630a0eb0c49f33687044f5d3fd545ce69fe4b03cec