[INFO] fetching crate rs-urlencoding 1.0.0...
[INFO] testing rs-urlencoding-1.0.0 against 1.95.0 for beta-1.96-2
[INFO] extracting crate rs-urlencoding 1.0.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate rs-urlencoding 1.0.0
[INFO] finished tweaking crates.io crate rs-urlencoding 1.0.0
[INFO] tweaked toml for crates.io crate rs-urlencoding 1.0.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rs-urlencoding 1.0.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] c593f2317968b888d5d01ad49b62db78768b4ad424bcd0b7a084bd7040ea2899
[INFO] running `Command { std: "docker" "start" "-a" "c593f2317968b888d5d01ad49b62db78768b4ad424bcd0b7a084bd7040ea2899", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c593f2317968b888d5d01ad49b62db78768b4ad424bcd0b7a084bd7040ea2899", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c593f2317968b888d5d01ad49b62db78768b4ad424bcd0b7a084bd7040ea2899", kill_on_drop: false }`
[INFO] [stdout] c593f2317968b888d5d01ad49b62db78768b4ad424bcd0b7a084bd7040ea2899
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3f3ee94e764558e0a7cb75b9ffe3f8b674a8fd1cb5f6f523fab737e37bf6fa7
[INFO] running `Command { std: "docker" "start" "-a" "e3f3ee94e764558e0a7cb75b9ffe3f8b674a8fd1cb5f6f523fab737e37bf6fa7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rs-urlencoding v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:41:1
[INFO] [stdout]    |
[INFO] [stdout] 41 | #![feature(matches_macro)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `matches_macro` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 | #![feature(matches_macro)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rs-urlencoding` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e3f3ee94e764558e0a7cb75b9ffe3f8b674a8fd1cb5f6f523fab737e37bf6fa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3f3ee94e764558e0a7cb75b9ffe3f8b674a8fd1cb5f6f523fab737e37bf6fa7", kill_on_drop: false }`
[INFO] [stdout] e3f3ee94e764558e0a7cb75b9ffe3f8b674a8fd1cb5f6f523fab737e37bf6fa7
