[INFO] fetching crate hydroperx-sem 1.0.0...
[INFO] checking hydroperx-sem-1.0.0 against 1.95.0 for pr-155915
[INFO] extracting crate hydroperx-sem 1.0.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate hydroperx-sem 1.0.0
[INFO] finished tweaking crates.io crate hydroperx-sem 1.0.0
[INFO] tweaked toml for crates.io crate hydroperx-sem 1.0.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate hydroperx-sem 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] crate crates.io crate hydroperx-sem 1.0.0 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 by_address v1.1.0
[INFO] [stderr]   Downloaded hydroperx-sem-proc v1.0.0
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26c9298828b2baba3f10246faf081f4f55701431e5fae7920dac98508d366bbd
[INFO] running `Command { std: "docker" "start" "-a" "26c9298828b2baba3f10246faf081f4f55701431e5fae7920dac98508d366bbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26c9298828b2baba3f10246faf081f4f55701431e5fae7920dac98508d366bbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26c9298828b2baba3f10246faf081f4f55701431e5fae7920dac98508d366bbd", kill_on_drop: false }`
[INFO] [stdout] 26c9298828b2baba3f10246faf081f4f55701431e5fae7920dac98508d366bbd
[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=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] 9159ed5581360637a3ceffb2973d4bc08c6d11858b244b9500751a6bc6c806a9
[INFO] running `Command { std: "docker" "start" "-a" "9159ed5581360637a3ceffb2973d4bc08c6d11858b244b9500751a6bc6c806a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling by_address v1.1.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling hydroperx-sem-proc v1.0.0
[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/hydroperx-sem-proc-1.0.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic)]
[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 `hydroperx-sem-proc` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "9159ed5581360637a3ceffb2973d4bc08c6d11858b244b9500751a6bc6c806a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9159ed5581360637a3ceffb2973d4bc08c6d11858b244b9500751a6bc6c806a9", kill_on_drop: false }`
[INFO] [stdout] 9159ed5581360637a3ceffb2973d4bc08c6d11858b244b9500751a6bc6c806a9
