[INFO] cloning repository https://github.com/lopeetall/fields-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lopeetall/fields-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flopeetall%2Ffields-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flopeetall%2Ffields-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2bc4676d2aa902a1c31a3c2c72eae127a3cb6edf
[INFO] testing lopeetall/fields-rust against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flopeetall%2Ffields-rust" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lopeetall/fields-rust on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lopeetall/fields-rust
[INFO] finished tweaking git repo https://github.com/lopeetall/fields-rust
[INFO] tweaked toml for git repo https://github.com/lopeetall/fields-rust written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/lopeetall/fields-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c6feb0a7e0ec7f95cd74c2b6427b52cb2880d8476d284a8fbd3106e746759d1b
[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" "c6feb0a7e0ec7f95cd74c2b6427b52cb2880d8476d284a8fbd3106e746759d1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6feb0a7e0ec7f95cd74c2b6427b52cb2880d8476d284a8fbd3106e746759d1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6feb0a7e0ec7f95cd74c2b6427b52cb2880d8476d284a8fbd3106e746759d1b", kill_on_drop: false }`
[INFO] [stdout] c6feb0a7e0ec7f95cd74c2b6427b52cb2880d8476d284a8fbd3106e746759d1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c521ba4ba75353f8d25aefbe443fbf1f92948705d1d9fa80a59639349ba27a97
[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" "c521ba4ba75353f8d25aefbe443fbf1f92948705d1d9fa80a59639349ba27a97", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.64
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling fields-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `rand`
[INFO] [stdout]   --> src/fields.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn rand () -> U256 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rand`
[INFO] [stdout]    --> src/fields.rs:363:12
[INFO] [stdout]     |
[INFO] [stdout] 363 |     pub fn rand (self) -> PrimeFieldElement {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.08s
[INFO] running `Command { std: "docker" "inspect" "c521ba4ba75353f8d25aefbe443fbf1f92948705d1d9fa80a59639349ba27a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c521ba4ba75353f8d25aefbe443fbf1f92948705d1d9fa80a59639349ba27a97", kill_on_drop: false }`
[INFO] [stdout] c521ba4ba75353f8d25aefbe443fbf1f92948705d1d9fa80a59639349ba27a97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d8401d0d0162f01e0c6220e059196c969b8b9fce0a86c0e3ab236131abbead6
[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" "3d8401d0d0162f01e0c6220e059196c969b8b9fce0a86c0e3ab236131abbead6", kill_on_drop: false }`
[INFO] [stderr]    Compiling fields-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `rand`
[INFO] [stdout]   --> src/fields.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn rand () -> U256 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rand`
[INFO] [stdout]    --> src/fields.rs:363:12
[INFO] [stdout]     |
[INFO] [stdout] 363 |     pub fn rand (self) -> PrimeFieldElement {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "3d8401d0d0162f01e0c6220e059196c969b8b9fce0a86c0e3ab236131abbead6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d8401d0d0162f01e0c6220e059196c969b8b9fce0a86c0e3ab236131abbead6", kill_on_drop: false }`
[INFO] [stdout] 3d8401d0d0162f01e0c6220e059196c969b8b9fce0a86c0e3ab236131abbead6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen", 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] 039160c8fa000d6e3a9523490f937c9161ca9e9c0b650f66434ff4f907985c66
[INFO] running `Command { std: "docker" "start" "-a" "039160c8fa000d6e3a9523490f937c9161ca9e9c0b650f66434ff4f907985c66", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: associated function is never used: `rand`
[INFO] [stderr]   --> src/fields.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn rand () -> U256 {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `rand`
[INFO] [stderr]    --> src/fields.rs:363:12
[INFO] [stderr]     |
[INFO] [stderr] 363 |     pub fn rand (self) -> PrimeFieldElement {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.60s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fields_rust-eb248a4cb26a422c
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "039160c8fa000d6e3a9523490f937c9161ca9e9c0b650f66434ff4f907985c66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "039160c8fa000d6e3a9523490f937c9161ca9e9c0b650f66434ff4f907985c66", kill_on_drop: false }`
[INFO] [stdout] 039160c8fa000d6e3a9523490f937c9161ca9e9c0b650f66434ff4f907985c66