[INFO] fetching crate bls12_381_ietf 0.1.3...
[INFO] checking bls12_381_ietf-0.1.3 against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] extracting crate bls12_381_ietf 0.1.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate bls12_381_ietf 0.1.3 on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bls12_381_ietf 0.1.3
[INFO] finished tweaking crates.io crate bls12_381_ietf 0.1.3
[INFO] tweaked toml for crates.io crate bls12_381_ietf 0.1.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate bls12_381_ietf 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ff_ce v0.9.0
[INFO] [stderr]   Downloaded ff_derive_ce v0.7.0
[INFO] [stderr]   Downloaded pairing_ce v0.20.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "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] 9a8e6020369fe5b38d72de1a3f8f6ad7c16e1524d780f39eb66d21cace581b18
[INFO] running `Command { std: "docker" "start" "-a" "9a8e6020369fe5b38d72de1a3f8f6ad7c16e1524d780f39eb66d21cace581b18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a8e6020369fe5b38d72de1a3f8f6ad7c16e1524d780f39eb66d21cace581b18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a8e6020369fe5b38d72de1a3f8f6ad7c16e1524d780f39eb66d21cace581b18", kill_on_drop: false }`
[INFO] [stdout] 9a8e6020369fe5b38d72de1a3f8f6ad7c16e1524d780f39eb66d21cace581b18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef9be7c03a16c17439e2e4a2f32f786e38efee2508d0bc90cfd3f000cc08bad6
[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" "ef9be7c03a16c17439e2e4a2f32f786e38efee2508d0bc90cfd3f000cc08bad6", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking hkdf v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]    Compiling ff_derive_ce v0.7.0
[INFO] [stderr]     Checking ff_ce v0.9.0
[INFO] [stderr]     Checking pairing_ce v0.20.0
[INFO] [stderr]     Checking bls12_381_ietf v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.54s
[INFO] running `Command { std: "docker" "inspect" "ef9be7c03a16c17439e2e4a2f32f786e38efee2508d0bc90cfd3f000cc08bad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef9be7c03a16c17439e2e4a2f32f786e38efee2508d0bc90cfd3f000cc08bad6", kill_on_drop: false }`
[INFO] [stdout] ef9be7c03a16c17439e2e4a2f32f786e38efee2508d0bc90cfd3f000cc08bad6