[INFO] fetching crate secp256kfun 0.6.2...
[INFO] checking secp256kfun-0.6.2 against 1.55.0 for beta-1.56-3
[INFO] extracting crate secp256kfun 0.6.2 into /workspace/builds/worker-74/source
[INFO] validating manifest of crates.io crate secp256kfun 0.6.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate secp256kfun 0.6.2
[INFO] finished tweaking crates.io crate secp256kfun 0.6.2
[INFO] tweaked toml for crates.io crate secp256kfun 0.6.2 written to /workspace/builds/worker-74/source/Cargo.toml
[INFO] crate crates.io crate secp256kfun 0.6.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.75
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.75
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.75
[INFO] [stderr]   Downloaded web-sys v0.3.52
[INFO] [stderr]   Downloaded rusty-fork v0.3.0
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.75
[INFO] [stderr]   Downloaded proptest v0.10.1
[INFO] [stderr]   Downloaded secp256kfun_parity_backend v0.1.5
[INFO] [stderr]   Downloaded subtle-ng v2.4.1
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.75
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.25
[INFO] [stderr]   Downloaded js-sys v0.3.52
[INFO] [stderr]   Downloaded cpufeatures v0.1.5
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.25
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff6da03619ca2c6553ddfb587fb52c93e6eb44389c8d12110b2fb52435a44c7b
[INFO] running `Command { std: "docker" "start" "-a" "ff6da03619ca2c6553ddfb587fb52c93e6eb44389c8d12110b2fb52435a44c7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff6da03619ca2c6553ddfb587fb52c93e6eb44389c8d12110b2fb52435a44c7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff6da03619ca2c6553ddfb587fb52c93e6eb44389c8d12110b2fb52435a44c7b", kill_on_drop: false }`
[INFO] [stdout] ff6da03619ca2c6553ddfb587fb52c93e6eb44389c8d12110b2fb52435a44c7b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 975a4bccb5144a83ffa5a2f7ca17804e166c9180b70d99fe14f58602b0b5c10d
[INFO] running `Command { std: "docker" "start" "-a" "975a4bccb5144a83ffa5a2f7ca17804e166c9180b70d99fe14f58602b0b5c10d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling subtle-ng v2.4.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking cpufeatures v0.1.5
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling secp256k1-sys v0.4.1
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking secp256kfun_parity_backend v0.1.5
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking generic-array v0.14.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking secp256k1 v0.20.3
[INFO] [stderr]    Compiling secp256kfun v0.6.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking sha2 v0.9.5
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(feature = "nightly", feature(min_specialization, rustc_attrs))]
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `secp256kfun` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "975a4bccb5144a83ffa5a2f7ca17804e166c9180b70d99fe14f58602b0b5c10d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "975a4bccb5144a83ffa5a2f7ca17804e166c9180b70d99fe14f58602b0b5c10d", kill_on_drop: false }`
[INFO] [stdout] 975a4bccb5144a83ffa5a2f7ca17804e166c9180b70d99fe14f58602b0b5c10d
