[INFO] fetching crate rpz 0.2.0...
[INFO] testing rpz-0.2.0 against 1.76.0 for beta-1.77-1
[INFO] extracting crate rpz 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate rpz 0.2.0 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate rpz 0.2.0
[INFO] finished tweaking crates.io crate rpz 0.2.0
[INFO] tweaked toml for crates.io crate rpz 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate rpz 0.2.0 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded priv_sep v0.8.1
[INFO] [stderr]   Downloaded zfc v0.3.1
[INFO] [stderr]   Downloaded async-compression v0.4.4
[INFO] [stderr]   Downloaded superset_map v0.2.1
[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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 530e23190f545a4e3fdac2dead854253679240bd3131ffa7076b8b50b9484170
[INFO] running `Command { std: "docker" "start" "-a" "530e23190f545a4e3fdac2dead854253679240bd3131ffa7076b8b50b9484170", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "530e23190f545a4e3fdac2dead854253679240bd3131ffa7076b8b50b9484170", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "530e23190f545a4e3fdac2dead854253679240bd3131ffa7076b8b50b9484170", kill_on_drop: false }`
[INFO] [stdout] 530e23190f545a4e3fdac2dead854253679240bd3131ffa7076b8b50b9484170
[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" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 585607e37f64a58b01e6f9c639f1fe9eb94f1bfacc1b49035666e64fa8cbdfd8
[INFO] running `Command { std: "docker" "start" "-a" "585607e37f64a58b01e6f9c639f1fe9eb94f1bfacc1b49035666e64fa8cbdfd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling bytes v1.5.0
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]    Compiling serde v1.0.192
[INFO] [stderr]    Compiling futures-task v0.3.29
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling semver v1.0.20
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]    Compiling itoa v1.0.9
[INFO] [stderr]    Compiling untrusted v0.9.0
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling futures-channel v0.3.29
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling socket2 v0.5.5
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling mio v0.8.9
[INFO] [stderr]    Compiling percent-encoding v2.3.0
[INFO] [stderr]    Compiling http v0.2.9
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling tokio v1.33.0
[INFO] [stderr]    Compiling form_urlencoded v1.2.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling unicode-bidi v0.3.13
[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.4
[INFO] [stderr]    Compiling rustls v0.21.8
[INFO] [stderr]    Compiling async-trait v0.1.74
[INFO] [stderr]    Compiling smallvec v1.11.1
[INFO] [stderr]    Compiling futures-sink v0.3.29
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]    Compiling ring v0.17.5
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling idna v0.4.0
[INFO] [stderr]    Compiling alloc-stdlib v0.2.2
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling try-lock v0.2.4
[INFO] [stderr]    Compiling match_cfg v0.1.0
[INFO] [stderr]    Compiling want v0.3.1
[INFO] [stderr]    Compiling hostname v0.3.1
[INFO] [stderr]    Compiling miniz_oxide v0.7.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling brotli-decompressor v2.5.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling http-body v0.4.5
[INFO] [stderr]    Compiling zfc v0.3.1
[INFO] [stderr]    Compiling socket2 v0.4.10
[INFO] [stderr]    Compiling futures-io v0.3.29
[INFO] [stderr]    Compiling httpdate v1.0.3
[INFO] [stderr]    Compiling hashbrown v0.14.2
[INFO] [stderr]    Compiling base64 v0.21.5
[INFO] [stderr]    Compiling tower-service v0.3.2
[INFO] [stderr]    Compiling data-encoding v2.4.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling equivalent v1.0.1
[INFO] [stderr]    Compiling linked-hash-map v0.5.6
[INFO] [stderr]    Compiling ipnet v2.9.0
[INFO] [stderr]    Compiling lru-cache v0.1.2
[INFO] [stderr]    Compiling indexmap v2.1.0
[INFO] [stderr]    Compiling resolv-conf v0.7.0
[INFO] [stderr]    Compiling rustls-pemfile v1.0.3
[INFO] [stderr]    Compiling brotli v3.4.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling flate2 v1.0.28
[INFO] [stderr]    Compiling winnow v0.5.19
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling ryu v1.0.15
[INFO] [stderr]    Compiling rustls-native-certs v0.6.3
[INFO] [stderr]    Compiling rpz v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling superset_map v0.2.1
[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-6f17d22bba15001f/superset_map-0.2.1/src/lib.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | #![feature(btree_cursors)]
[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 `superset_map` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "585607e37f64a58b01e6f9c639f1fe9eb94f1bfacc1b49035666e64fa8cbdfd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "585607e37f64a58b01e6f9c639f1fe9eb94f1bfacc1b49035666e64fa8cbdfd8", kill_on_drop: false }`
[INFO] [stdout] 585607e37f64a58b01e6f9c639f1fe9eb94f1bfacc1b49035666e64fa8cbdfd8
