[INFO] cloning repository https://github.com/kgish/rust-ffi-sqrt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kgish/rust-ffi-sqrt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkgish%2Frust-ffi-sqrt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkgish%2Frust-ffi-sqrt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9aa62d1cc1dc1a302fd730ce496e6715b442cd31
[INFO] testing kgish/rust-ffi-sqrt against master#414482f6a0d4e7290f614300581a0b55442552a3 for pr-140985
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkgish%2Frust-ffi-sqrt" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kgish/rust-ffi-sqrt on toolchain 414482f6a0d4e7290f614300581a0b55442552a3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kgish/rust-ffi-sqrt
[INFO] finished tweaking git repo https://github.com/kgish/rust-ffi-sqrt
[INFO] tweaked toml for git repo https://github.com/kgish/rust-ffi-sqrt written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kgish/rust-ffi-sqrt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e37594d2cdbd4fa291fe9643d3f0ed9816047410feb14627cac5897ef3c8de71
[INFO] running `Command { std: "docker" "start" "-a" "e37594d2cdbd4fa291fe9643d3f0ed9816047410feb14627cac5897ef3c8de71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e37594d2cdbd4fa291fe9643d3f0ed9816047410feb14627cac5897ef3c8de71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e37594d2cdbd4fa291fe9643d3f0ed9816047410feb14627cac5897ef3c8de71", kill_on_drop: false }`
[INFO] [stdout] e37594d2cdbd4fa291fe9643d3f0ed9816047410feb14627cac5897ef3c8de71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76f330c735a8681eff3cf1e8460d5d707a596d1e480101fdb2b868a4d020ceb6
[INFO] running `Command { std: "docker" "start" "-a" "76f330c735a8681eff3cf1e8460d5d707a596d1e480101fdb2b868a4d020ceb6", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-ffi-sqrt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: attribute should be applied to an `extern` block with non-Rust ABI
[INFO] [stdout]   --> src/main.rs:5:1
[INFO] [stdout]    |
[INFO] [stdout] 5  |   #[link(name = "m")]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6  | / fn main() {
[INFO] [stdout] 7  | |
[INFO] [stdout] 8  | |     let x: f64 = 2.;
[INFO] [stdout] 9  | |     let result: f64 = unsafe { sqrt(x) };
[INFO] [stdout] 10 | |
[INFO] [stdout] 11 | |     println!("The square root of {} is {}", x, result);
[INFO] [stdout] 12 | | }
[INFO] [stdout]    | |_- not an `extern` block
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "76f330c735a8681eff3cf1e8460d5d707a596d1e480101fdb2b868a4d020ceb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76f330c735a8681eff3cf1e8460d5d707a596d1e480101fdb2b868a4d020ceb6", kill_on_drop: false }`
[INFO] [stdout] 76f330c735a8681eff3cf1e8460d5d707a596d1e480101fdb2b868a4d020ceb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4db69e4015d41ae94c801d7ad8896c327b7f762c3bf84b426e201f82c414aff
[INFO] running `Command { std: "docker" "start" "-a" "d4db69e4015d41ae94c801d7ad8896c327b7f762c3bf84b426e201f82c414aff", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-ffi-sqrt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: attribute should be applied to an `extern` block with non-Rust ABI
[INFO] [stdout]   --> src/main.rs:5:1
[INFO] [stdout]    |
[INFO] [stdout] 5  |   #[link(name = "m")]
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 6  | / fn main() {
[INFO] [stdout] 7  | |
[INFO] [stdout] 8  | |     let x: f64 = 2.;
[INFO] [stdout] 9  | |     let result: f64 = unsafe { sqrt(x) };
[INFO] [stdout] 10 | |
[INFO] [stdout] 11 | |     println!("The square root of {} is {}", x, result);
[INFO] [stdout] 12 | | }
[INFO] [stdout]    | |_- not an `extern` block
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "d4db69e4015d41ae94c801d7ad8896c327b7f762c3bf84b426e201f82c414aff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4db69e4015d41ae94c801d7ad8896c327b7f762c3bf84b426e201f82c414aff", kill_on_drop: false }`
[INFO] [stdout] d4db69e4015d41ae94c801d7ad8896c327b7f762c3bf84b426e201f82c414aff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+414482f6a0d4e7290f614300581a0b55442552a3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9b0ba10760d5f22249bfeac2cd7f51b64861f6b5ff919c33e610fcbb68c46a9c
[INFO] running `Command { std: "docker" "start" "-a" "9b0ba10760d5f22249bfeac2cd7f51b64861f6b5ff919c33e610fcbb68c46a9c", kill_on_drop: false }`
[INFO] [stderr] warning: attribute should be applied to an `extern` block with non-Rust ABI
[INFO] [stderr]   --> src/main.rs:5:1
[INFO] [stderr]    |
[INFO] [stderr] 5  |   #[link(name = "m")]
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 6  | / fn main() {
[INFO] [stderr] 7  | |
[INFO] [stderr] 8  | |     let x: f64 = 2.;
[INFO] [stderr] 9  | |     let result: f64 = unsafe { sqrt(x) };
[INFO] [stderr] 10 | |
[INFO] [stderr] 11 | |     println!("The square root of {} is {}", x, result);
[INFO] [stderr] 12 | | }
[INFO] [stderr]    | |_- not an `extern` block
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-ffi-sqrt` (bin "rust-ffi-sqrt" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_ffi_sqrt-b679e05e9fe568e8)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9b0ba10760d5f22249bfeac2cd7f51b64861f6b5ff919c33e610fcbb68c46a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b0ba10760d5f22249bfeac2cd7f51b64861f6b5ff919c33e610fcbb68c46a9c", kill_on_drop: false }`
[INFO] [stdout] 9b0ba10760d5f22249bfeac2cd7f51b64861f6b5ff919c33e610fcbb68c46a9c