[INFO] fetching crate rpz 1.4.1...
[INFO] testing rpz-1.4.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate rpz 1.4.1 into /workspace/builds/worker-2-tc1/source
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate rpz 1.4.1
[INFO] finished tweaking crates.io crate rpz 1.4.1
[INFO] tweaked toml for crates.io crate rpz 1.4.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rpz 1.4.1 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 rpz 1.4.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded compression-codecs v0.4.28
[INFO] [stderr]   Downloaded zfc v0.4.4
[INFO] [stderr]   Downloaded ascii_domain v0.6.6
[INFO] [stderr]   Downloaded priv_sep v3.0.0-alpha.1.3
[INFO] [stderr]   Downloaded compression-core v0.4.28
[INFO] [stderr]   Downloaded async-compression v0.4.28
[INFO] [stderr]   Downloaded superset_map v0.3.4
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cd5fe6ae14a99cb89d180c7c65e86600bf30abf686f67a7a051ec79b730979ca
[INFO] running `Command { std: "docker" "start" "-a" "cd5fe6ae14a99cb89d180c7c65e86600bf30abf686f67a7a051ec79b730979ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cd5fe6ae14a99cb89d180c7c65e86600bf30abf686f67a7a051ec79b730979ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd5fe6ae14a99cb89d180c7c65e86600bf30abf686f67a7a051ec79b730979ca", kill_on_drop: false }`
[INFO] [stdout] cd5fe6ae14a99cb89d180c7c65e86600bf30abf686f67a7a051ec79b730979ca
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f78f2a086886d0f85993cf5eb7e59fa942b3ffc8c9bc667ace44da308f59b06b
[INFO] running `Command { std: "docker" "start" "-a" "f78f2a086886d0f85993cf5eb7e59fa942b3ffc8c9bc667ace44da308f59b06b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling cc v1.2.34
[INFO] [stderr]    Compiling http v1.3.1
[INFO] [stderr]    Compiling futures-task v0.3.31
[INFO] [stderr]    Compiling rustls-pki-types v1.12.0
[INFO] [stderr]    Compiling rustls v0.23.31
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling brotli-decompressor v5.0.0
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling sync_wrapper v1.0.2
[INFO] [stderr]    Compiling compression-core v0.4.28
[INFO] [stderr]    Compiling bitflags v2.9.3
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling iri-string v0.7.8
[INFO] [stderr]    Compiling winnow v0.7.13
[INFO] [stderr]    Compiling priv_sep v3.0.0-alpha.1.3
[INFO] [stderr]    Compiling ascii_domain v0.6.6
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling rustls-native-certs v0.8.1
[INFO] [stderr]    Compiling flate2 v1.1.2
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling http-body v1.0.1
[INFO] [stderr]    Compiling ring v0.17.14
[INFO] [stderr]    Compiling http-body-util v0.1.3
[INFO] [stderr]    Compiling brotli v8.0.2
[INFO] [stderr]    Compiling toml_parser v1.0.2
[INFO] [stderr]    Compiling zfc v0.4.4
[INFO] [stderr]    Compiling superset_map v0.3.4
[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-1949cf8c6b5b557f/superset_map-0.3.4/src/lib.rs:138:1
[INFO] [stdout]     |
[INFO] [stdout] 138 | #![feature(btree_cursors)]
[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 `superset_map` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f78f2a086886d0f85993cf5eb7e59fa942b3ffc8c9bc667ace44da308f59b06b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f78f2a086886d0f85993cf5eb7e59fa942b3ffc8c9bc667ace44da308f59b06b", kill_on_drop: false }`
[INFO] [stdout] f78f2a086886d0f85993cf5eb7e59fa942b3ffc8c9bc667ace44da308f59b06b