[INFO] fetching crate rpz 2.1.0...
[INFO] checking rpz-2.1.0 against 1.95.0 for pr-155915
[INFO] extracting crate rpz 2.1.0 into /workspace/builds/worker-5-tc1/source
[INFO] removed /workspace/builds/worker-5-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate rpz 2.1.0
[INFO] finished tweaking crates.io crate rpz 2.1.0
[INFO] tweaked toml for crates.io crate rpz 2.1.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rpz 2.1.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rpz 2.1.0 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zfc v0.4.7
[INFO] [stderr]   Downloaded superset_map v0.3.6
[INFO] [stderr]   Downloaded toml v1.0.7+spec-1.1.0
[INFO] [stderr]   Downloaded ascii_domain v0.6.9
[INFO] [stderr]   Downloaded priv_sep v3.0.0-alpha.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa1ecc1bbb94a85633d96eec537a3fd63af519b51a7f3aa196e7db573eb7be22
[INFO] running `Command { std: "docker" "start" "-a" "fa1ecc1bbb94a85633d96eec537a3fd63af519b51a7f3aa196e7db573eb7be22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa1ecc1bbb94a85633d96eec537a3fd63af519b51a7f3aa196e7db573eb7be22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa1ecc1bbb94a85633d96eec537a3fd63af519b51a7f3aa196e7db573eb7be22", kill_on_drop: false }`
[INFO] [stdout] fa1ecc1bbb94a85633d96eec537a3fd63af519b51a7f3aa196e7db573eb7be22
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3309985295f1cc01a15738591f137b5b2da3a32b8b7eacda83f5b012a104be0b
[INFO] running `Command { std: "docker" "start" "-a" "3309985295f1cc01a15738591f137b5b2da3a32b8b7eacda83f5b012a104be0b", kill_on_drop: false }`
[INFO] [stderr]    Compiling aws-lc-rs v1.16.1
[INFO] [stderr]    Compiling cc v1.2.57
[INFO] [stderr]     Checking tokio v1.50.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling rustls v0.23.37
[INFO] [stderr]     Checking futures-util v0.3.32
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking compression-codecs v0.4.37
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking http-body-util v0.1.3
[INFO] [stderr]     Checking winnow v1.0.0
[INFO] [stderr]     Checking serde_spanned v1.0.4
[INFO] [stderr]     Checking toml_datetime v1.0.1+spec-1.1.0
[INFO] [stderr]     Checking ascii_domain v0.6.9
[INFO] [stderr]     Checking toml_parser v1.0.10+spec-1.1.0
[INFO] [stderr]     Checking toml v1.0.7+spec-1.1.0
[INFO] [stderr]     Checking zfc v0.4.7
[INFO] [stderr]     Checking superset_map v0.3.6
[INFO] [stderr]    Compiling cmake v0.1.57
[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-0.3.6/src/lib.rs:142:1
[INFO] [stdout]     |
[INFO] [stdout] 142 | #![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" "3309985295f1cc01a15738591f137b5b2da3a32b8b7eacda83f5b012a104be0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3309985295f1cc01a15738591f137b5b2da3a32b8b7eacda83f5b012a104be0b", kill_on_drop: false }`
[INFO] [stdout] 3309985295f1cc01a15738591f137b5b2da3a32b8b7eacda83f5b012a104be0b