[INFO] fetching crate flx 0.2.2...
[INFO] testing flx-0.2.2 against 1.75.0 for beta-1.76-1
[INFO] extracting crate flx 0.2.2 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate flx 0.2.2 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 flx 0.2.2
[INFO] finished tweaking crates.io crate flx 0.2.2
[INFO] tweaked toml for crates.io crate flx 0.2.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 6df08619f89ac074fe958a4fdf23847ec05ed9ce30de588bd39e900f66402e9c
[INFO] running `Command { std: "docker" "start" "-a" "6df08619f89ac074fe958a4fdf23847ec05ed9ce30de588bd39e900f66402e9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6df08619f89ac074fe958a4fdf23847ec05ed9ce30de588bd39e900f66402e9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6df08619f89ac074fe958a4fdf23847ec05ed9ce30de588bd39e900f66402e9c", kill_on_drop: false }`
[INFO] [stdout] 6df08619f89ac074fe958a4fdf23847ec05ed9ce30de588bd39e900f66402e9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] b88a673db97518deaa3ef6f05340fbb25ceb98dcae45f4f2fa467a3fc47d161c
[INFO] running `Command { std: "docker" "start" "-a" "b88a673db97518deaa3ef6f05340fbb25ceb98dcae45f4f2fa467a3fc47d161c", kill_on_drop: false }`
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling flx v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "b88a673db97518deaa3ef6f05340fbb25ceb98dcae45f4f2fa467a3fc47d161c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b88a673db97518deaa3ef6f05340fbb25ceb98dcae45f4f2fa467a3fc47d161c", kill_on_drop: false }`
[INFO] [stdout] b88a673db97518deaa3ef6f05340fbb25ceb98dcae45f4f2fa467a3fc47d161c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ecd86e7c16cd444ab8ccd4038fab41b570b133d1299d15e86a8fe6915020f1d
[INFO] running `Command { std: "docker" "start" "-a" "1ecd86e7c16cd444ab8ccd4038fab41b570b133d1299d15e86a8fe6915020f1d", kill_on_drop: false }`
[INFO] [stderr]    Compiling flx v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]   |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flx` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "1ecd86e7c16cd444ab8ccd4038fab41b570b133d1299d15e86a8fe6915020f1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ecd86e7c16cd444ab8ccd4038fab41b570b133d1299d15e86a8fe6915020f1d", kill_on_drop: false }`
[INFO] [stdout] 1ecd86e7c16cd444ab8ccd4038fab41b570b133d1299d15e86a8fe6915020f1d
[INFO] testing flx-0.2.2 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate flx 0.2.2 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate flx 0.2.2 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flx 0.2.2
[INFO] finished tweaking crates.io crate flx 0.2.2
[INFO] tweaked toml for crates.io crate flx 0.2.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4fd67d0d3a7f5f6b9f1f8980ed0e456ae16ae9ae9bd59ba27ee32a4af6ac5519
[INFO] running `Command { std: "docker" "start" "-a" "4fd67d0d3a7f5f6b9f1f8980ed0e456ae16ae9ae9bd59ba27ee32a4af6ac5519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fd67d0d3a7f5f6b9f1f8980ed0e456ae16ae9ae9bd59ba27ee32a4af6ac5519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fd67d0d3a7f5f6b9f1f8980ed0e456ae16ae9ae9bd59ba27ee32a4af6ac5519", kill_on_drop: false }`
[INFO] [stdout] 4fd67d0d3a7f5f6b9f1f8980ed0e456ae16ae9ae9bd59ba27ee32a4af6ac5519
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=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" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6f552f9ad79fd5126034b19b67eaaeb7e7e5b4545e3f7c29a110411f2b20c10
[INFO] running `Command { std: "docker" "start" "-a" "b6f552f9ad79fd5126034b19b67eaaeb7e7e5b4545e3f7c29a110411f2b20c10", kill_on_drop: false }`
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling flx v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "b6f552f9ad79fd5126034b19b67eaaeb7e7e5b4545e3f7c29a110411f2b20c10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6f552f9ad79fd5126034b19b67eaaeb7e7e5b4545e3f7c29a110411f2b20c10", kill_on_drop: false }`
[INFO] [stdout] b6f552f9ad79fd5126034b19b67eaaeb7e7e5b4545e3f7c29a110411f2b20c10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=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" "+beta-2023-12-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8efb9fa62515088c7ceec729051098739d724fdb8c08cf408c40e7af2ba6d509
[INFO] running `Command { std: "docker" "start" "-a" "8efb9fa62515088c7ceec729051098739d724fdb8c08cf408c40e7af2ba6d509", kill_on_drop: false }`
[INFO] [stderr]    Compiling flx v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]   |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flx` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8efb9fa62515088c7ceec729051098739d724fdb8c08cf408c40e7af2ba6d509", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8efb9fa62515088c7ceec729051098739d724fdb8c08cf408c40e7af2ba6d509", kill_on_drop: false }`
[INFO] [stdout] 8efb9fa62515088c7ceec729051098739d724fdb8c08cf408c40e7af2ba6d509
