[INFO] fetching crate schnorr_fun 0.3.2...
[INFO] checking schnorr_fun-0.3.2 against beta for pr-78714
[INFO] extracting crate schnorr_fun 0.3.2 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate schnorr_fun 0.3.2 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate schnorr_fun 0.3.2
[INFO] finished tweaking crates.io crate schnorr_fun 0.3.2
[INFO] tweaked toml for crates.io crate schnorr_fun 0.3.2 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f090fa1882c4f3ac16175f922cafee1dcd1daf99549dcf98d34b8c7ac5d1d845
[INFO] running `Command { std: "docker" "start" "-a" "f090fa1882c4f3ac16175f922cafee1dcd1daf99549dcf98d34b8c7ac5d1d845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f090fa1882c4f3ac16175f922cafee1dcd1daf99549dcf98d34b8c7ac5d1d845", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f090fa1882c4f3ac16175f922cafee1dcd1daf99549dcf98d34b8c7ac5d1d845", kill_on_drop: false }`
[INFO] [stdout] f090fa1882c4f3ac16175f922cafee1dcd1daf99549dcf98d34b8c7ac5d1d845
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47fbae3adaa54c882eeb2541e3430e24de7a4d59e0f025a72c1747cb7e4fea05
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "47fbae3adaa54c882eeb2541e3430e24de7a4d59e0f025a72c1747cb7e4fea05", kill_on_drop: false }`
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling subtle v2.3.0
[INFO] [stderr]    Compiling cc v1.0.41
[INFO] [stderr]     Checking odds v0.2.26
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking oorandom v11.1.2
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking sha2 v0.9.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling secp256kfun_parity_backend v0.1.2
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking arrayvec v0.3.25
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking tinytemplate v1.1.0
[INFO] [stderr]    Compiling grin_secp256k1zkp v0.7.9
[INFO] [stderr]     Checking csv v1.1.4
[INFO] [stderr]    Compiling secp256kfun v0.3.1
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling zeroize_derive v0.9.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/secp256kfun-0.3.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(rustc_attrs, min_specialization, external_doc)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking zeroize v0.9.3
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "47fbae3adaa54c882eeb2541e3430e24de7a4d59e0f025a72c1747cb7e4fea05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47fbae3adaa54c882eeb2541e3430e24de7a4d59e0f025a72c1747cb7e4fea05", kill_on_drop: false }`
[INFO] [stdout] 47fbae3adaa54c882eeb2541e3430e24de7a4d59e0f025a72c1747cb7e4fea05