[INFO] cloning repository https://github.com/gyng/midcat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gyng/midcat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgyng%2Fmidcat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgyng%2Fmidcat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 77677cdabbb18277e6046fc1450d49895c30c61e
[INFO] checking gyng/midcat against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgyng%2Fmidcat" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/gyng/midcat
[INFO] finished tweaking git repo https://github.com/gyng/midcat
[INFO] tweaked toml for git repo https://github.com/gyng/midcat written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gyng/midcat 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 git repo https://github.com/gyng/midcat 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] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Updating git repository `https://github.com/gyng/synthrs`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.2.2
[INFO] [stderr]   Downloaded num-rational v0.2.1
[INFO] [stderr]   Downloaded num v0.2.0
[INFO] [stderr]   Downloaded rand_core v0.3.0
[INFO] [stderr]   Downloaded bitflags v0.7.0
[INFO] [stderr]   Downloaded byteorder v1.2.7
[INFO] [stderr]   Downloaded num-complex v0.2.1
[INFO] [stderr]   Downloaded unreachable v1.0.0
[INFO] [stderr]   Downloaded void v1.0.2
[INFO] [stderr]   Downloaded pkg-config v0.3.9
[INFO] [stderr]   Downloaded ole32-sys v0.2.0
[INFO] [stderr]   Downloaded lazy_static v0.2.9
[INFO] [stderr]   Downloaded thread_local v0.3.4
[INFO] [stderr]   Downloaded memchr v1.0.1
[INFO] [stderr]   Downloaded strsim v0.6.0
[INFO] [stderr]   Downloaded utf8-ranges v1.0.0
[INFO] [stderr]   Downloaded alsa-sys v0.1.1
[INFO] [stderr]   Downloaded coreaudio-rs v0.6.0
[INFO] [stderr]   Downloaded serde_derive_internals v0.16.0
[INFO] [stderr]   Downloaded aho-corasick v0.6.3
[INFO] [stderr]   Downloaded num-bigint v0.2.1
[INFO] [stderr]   Downloaded cpal v0.4.5
[INFO] [stderr]   Downloaded coreaudio-sys v0.1.2
[INFO] [stderr]   Downloaded syn v0.11.11
[INFO] [stderr]   Downloaded serde v1.0.15
[INFO] [stderr]   Downloaded regex-syntax v0.4.1
[INFO] [stderr]   Downloaded rand v0.5.5
[INFO] [stderr]   Downloaded futures v0.1.16
[INFO] [stderr]   Downloaded docopt v0.8.1
[INFO] [stderr]   Downloaded serde_derive v1.0.15
[INFO] [stderr]   Downloaded regex v0.2.2
[INFO] [stderr]   Downloaded libc v0.2.32
[INFO] [stderr]   Downloaded synom v0.11.3
[INFO] [stderr]   Downloaded quote v0.3.15
[INFO] [stderr]   Downloaded unicode-xid v0.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 6126d8ebff26e70be261ee3bdd44ade02b408520b989607d18bbe48a7ecb3ee8
[INFO] running `Command { std: "docker" "start" "-a" "6126d8ebff26e70be261ee3bdd44ade02b408520b989607d18bbe48a7ecb3ee8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6126d8ebff26e70be261ee3bdd44ade02b408520b989607d18bbe48a7ecb3ee8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6126d8ebff26e70be261ee3bdd44ade02b408520b989607d18bbe48a7ecb3ee8", kill_on_drop: false }`
[INFO] [stdout] 6126d8ebff26e70be261ee3bdd44ade02b408520b989607d18bbe48a7ecb3ee8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 746faf37386fc25f4bd30c2a2de34993355163f671977a777d7d21b4001693f3
[INFO] running `Command { std: "docker" "start" "-a" "746faf37386fc25f4bd30c2a2de34993355163f671977a777d7d21b4001693f3", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking libc v0.2.32
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]     Checking lazy_static v0.2.9
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking futures v0.1.16
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling alsa-sys v0.1.1
[INFO] [stderr]    Compiling serde_derive_internals v0.16.0
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking cpal v0.4.5
[INFO] [stderr]    Compiling serde_derive v1.0.15
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking synthrs v0.1.0 (https://github.com/gyng/synthrs?rev=a067f2bee46e5f8593003dc4ad5b6df97bdb3898#a067f2be)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/synthrs-be4cedc8cd32795c/a067f2b/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(fn_traits, unboxed_closures)]
[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 `synthrs` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "746faf37386fc25f4bd30c2a2de34993355163f671977a777d7d21b4001693f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "746faf37386fc25f4bd30c2a2de34993355163f671977a777d7d21b4001693f3", kill_on_drop: false }`
[INFO] [stdout] 746faf37386fc25f4bd30c2a2de34993355163f671977a777d7d21b4001693f3