[INFO] cloning repository https://github.com/alexcrichton/rust-fannkuch-js-and-wasm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexcrichton/rust-fannkuch-js-and-wasm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexcrichton%2Frust-fannkuch-js-and-wasm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexcrichton%2Frust-fannkuch-js-and-wasm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e82d00a96f292d5faa66aebdb87978c0aa8c3caf
[INFO] testing alexcrichton/rust-fannkuch-js-and-wasm against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexcrichton%2Frust-fannkuch-js-and-wasm" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alexcrichton/rust-fannkuch-js-and-wasm 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/alexcrichton/rust-fannkuch-js-and-wasm
[INFO] finished tweaking git repo https://github.com/alexcrichton/rust-fannkuch-js-and-wasm
[INFO] tweaked toml for git repo https://github.com/alexcrichton/rust-fannkuch-js-and-wasm written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/alexcrichton/rust-fannkuch-js-and-wasm 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] [stderr]     Blocking waiting for file lock on package cache
[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" "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] 5873b99aaa85f398a3cd8b8017ac65227a016e0beecb6a09dfbb20f5ee6d2986
[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" "5873b99aaa85f398a3cd8b8017ac65227a016e0beecb6a09dfbb20f5ee6d2986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5873b99aaa85f398a3cd8b8017ac65227a016e0beecb6a09dfbb20f5ee6d2986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5873b99aaa85f398a3cd8b8017ac65227a016e0beecb6a09dfbb20f5ee6d2986", kill_on_drop: false }`
[INFO] [stdout] 5873b99aaa85f398a3cd8b8017ac65227a016e0beecb6a09dfbb20f5ee6d2986
[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" "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] cb8b07bccdaa0bb3cd8315ccdf38cbbc21da0d926348738949a55bda01599d5a
[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" "cb8b07bccdaa0bb3cd8315ccdf38cbbc21da0d926348738949a55bda01599d5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-fannkuch-js-and-wasm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `checksum`
[INFO] [stdout]    --> src/lib.rs:125:10
[INFO] [stdout]     |
[INFO] [stdout] 125 |     let (checksum, maxflips) = fannkuch(n);
[INFO] [stdout]     |          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_checksum`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `maxflips`
[INFO] [stdout]    --> src/lib.rs:125:20
[INFO] [stdout]     |
[INFO] [stdout] 125 |     let (checksum, maxflips) = fannkuch(n);
[INFO] [stdout]     |                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_maxflips`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "cb8b07bccdaa0bb3cd8315ccdf38cbbc21da0d926348738949a55bda01599d5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb8b07bccdaa0bb3cd8315ccdf38cbbc21da0d926348738949a55bda01599d5a", kill_on_drop: false }`
[INFO] [stdout] cb8b07bccdaa0bb3cd8315ccdf38cbbc21da0d926348738949a55bda01599d5a
[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" "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] 1bfa500967cd269fa2549432e0cecf52d05385ffb57e3901268c0c47071af4ac
[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" "1bfa500967cd269fa2549432e0cecf52d05385ffb57e3901268c0c47071af4ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-fannkuch-js-and-wasm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `checksum`
[INFO] [stdout]    --> src/lib.rs:125:10
[INFO] [stdout]     |
[INFO] [stdout] 125 |     let (checksum, maxflips) = fannkuch(n);
[INFO] [stdout]     |          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_checksum`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `maxflips`
[INFO] [stdout]    --> src/lib.rs:125:20
[INFO] [stdout]     |
[INFO] [stdout] 125 |     let (checksum, maxflips) = fannkuch(n);
[INFO] [stdout]     |                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_maxflips`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "1bfa500967cd269fa2549432e0cecf52d05385ffb57e3901268c0c47071af4ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bfa500967cd269fa2549432e0cecf52d05385ffb57e3901268c0c47071af4ac", kill_on_drop: false }`
[INFO] [stdout] 1bfa500967cd269fa2549432e0cecf52d05385ffb57e3901268c0c47071af4ac
[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" "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] [stdout] f294205e2c966440a1a538c1132384a1506e03aea5273f489298b33b7c3efb43
[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" "f294205e2c966440a1a538c1132384a1506e03aea5273f489298b33b7c3efb43", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `checksum`
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> src/lib.rs:125:10
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr] 125 |     let (checksum, maxflips) = fannkuch(n);
[INFO] [stdout] 
[INFO] [stderr]     |          ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_checksum`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `maxflips`
[INFO] [stderr]    --> src/lib.rs:125:20
[INFO] [stderr]     |
[INFO] [stderr] 125 |     let (checksum, maxflips) = fannkuch(n);
[INFO] [stderr]     |                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_maxflips`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rust_fannkuch_js_and_wasm-52e0490f9b29a70f
[INFO] running `Command { std: "docker" "inspect" "f294205e2c966440a1a538c1132384a1506e03aea5273f489298b33b7c3efb43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f294205e2c966440a1a538c1132384a1506e03aea5273f489298b33b7c3efb43", kill_on_drop: false }`
[INFO] [stdout] f294205e2c966440a1a538c1132384a1506e03aea5273f489298b33b7c3efb43