[INFO] fetching crate uper 0.1.10...
[INFO] testing uper-0.1.10 against 1.90.0 for beta-1.91-3
[INFO] extracting crate uper 0.1.10 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate uper 0.1.10
[INFO] finished tweaking crates.io crate uper 0.1.10
[INFO] tweaked toml for crates.io crate uper 0.1.10 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate uper 0.1.10 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 uper 0.1.10 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded vbyte v0.1.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d0d49a3ca81f4c38a2644a80ddf6f9abdf7f9787734bb8a2892767823211cf2e
[INFO] running `Command { std: "docker" "start" "-a" "d0d49a3ca81f4c38a2644a80ddf6f9abdf7f9787734bb8a2892767823211cf2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0d49a3ca81f4c38a2644a80ddf6f9abdf7f9787734bb8a2892767823211cf2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0d49a3ca81f4c38a2644a80ddf6f9abdf7f9787734bb8a2892767823211cf2e", kill_on_drop: false }`
[INFO] [stdout] d0d49a3ca81f4c38a2644a80ddf6f9abdf7f9787734bb8a2892767823211cf2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ef8b1eb2a43eccb5946fe38cf31c2437b4ecaa708f58759778e04ac4a1b25db4
[INFO] running `Command { std: "docker" "start" "-a" "ef8b1eb2a43eccb5946fe38cf31c2437b4ecaa708f58759778e04ac4a1b25db4", kill_on_drop: false }`
[INFO] [stderr]    Compiling jobserver v0.1.34
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[INFO] [stderr]    Compiling rustc-hash v2.1.1
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[INFO] [stderr]    Compiling serde_core v1.0.228
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[INFO] [stderr]    Compiling tempfile v3.23.0
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[INFO] [stderr]    Compiling confdir v0.1.4
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[INFO] [stderr]    Compiling confer v0.1.12
[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/ver_from_txt-0.1.9/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_concat_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/confer-0.1.12/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(doc_cfg)]
[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 `ver_from_txt` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `confer` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "ef8b1eb2a43eccb5946fe38cf31c2437b4ecaa708f58759778e04ac4a1b25db4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef8b1eb2a43eccb5946fe38cf31c2437b4ecaa708f58759778e04ac4a1b25db4", kill_on_drop: false }`
[INFO] [stdout] ef8b1eb2a43eccb5946fe38cf31c2437b4ecaa708f58759778e04ac4a1b25db4
