[INFO] fetching crate welford 0.1.0...
[INFO] testing welford-0.1.0 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate welford 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate welford 0.1.0
[INFO] finished tweaking crates.io crate welford 0.1.0
[INFO] tweaked toml for crates.io crate welford 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate welford 0.1.0 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate welford 0.1.0 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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 453bf74a329410972bad3474800e9f9f18bb3aad32be91e080f13c5b76072837
[INFO] running `Command { std: "docker" "start" "-a" "453bf74a329410972bad3474800e9f9f18bb3aad32be91e080f13c5b76072837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "453bf74a329410972bad3474800e9f9f18bb3aad32be91e080f13c5b76072837", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "453bf74a329410972bad3474800e9f9f18bb3aad32be91e080f13c5b76072837", kill_on_drop: false }`
[INFO] [stdout] 453bf74a329410972bad3474800e9f9f18bb3aad32be91e080f13c5b76072837
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98679622e7e2f77d5dcb4adcbef683fc6dda8b5932ca9b4cb3c4faa171412c3c
[INFO] running `Command { std: "docker" "start" "-a" "98679622e7e2f77d5dcb4adcbef683fc6dda8b5932ca9b4cb3c4faa171412c3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling welford v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `merge` is never used
[INFO] [stdout]    --> src/lib.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout]  61 | / impl<T, W> Welford<T, W>
[INFO] [stdout]  62 | | where
[INFO] [stdout]  63 | |     T: Copy + Num + NumAssign + NumCast,
[INFO] [stdout]  64 | |     W: Copy + Num + NumAssign + NumCast + PartialOrd,
[INFO] [stdout]     | |_____________________________________________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 100 |       fn merge(&mut self, other: Self) {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `Command { std: "docker" "inspect" "98679622e7e2f77d5dcb4adcbef683fc6dda8b5932ca9b4cb3c4faa171412c3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98679622e7e2f77d5dcb4adcbef683fc6dda8b5932ca9b4cb3c4faa171412c3c", kill_on_drop: false }`
[INFO] [stdout] 98679622e7e2f77d5dcb4adcbef683fc6dda8b5932ca9b4cb3c4faa171412c3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51b88cf43aebfbf4e996dbb07d21b6bacf9d6d465e028a131db2c56278a639a0
[INFO] running `Command { std: "docker" "start" "-a" "51b88cf43aebfbf4e996dbb07d21b6bacf9d6d465e028a131db2c56278a639a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling welford v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `merge` is never used
[INFO] [stdout]    --> src/lib.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout]  61 | / impl<T, W> Welford<T, W>
[INFO] [stdout]  62 | | where
[INFO] [stdout]  63 | |     T: Copy + Num + NumAssign + NumCast,
[INFO] [stdout]  64 | |     W: Copy + Num + NumAssign + NumCast + PartialOrd,
[INFO] [stdout]     | |_____________________________________________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 100 |       fn merge(&mut self, other: Self) {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "51b88cf43aebfbf4e996dbb07d21b6bacf9d6d465e028a131db2c56278a639a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51b88cf43aebfbf4e996dbb07d21b6bacf9d6d465e028a131db2c56278a639a0", kill_on_drop: false }`
[INFO] [stdout] 51b88cf43aebfbf4e996dbb07d21b6bacf9d6d465e028a131db2c56278a639a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7be034b35653ebbd4e6a0910eab34f248c315bf1fc92d7cdd686c7f536870a70
[INFO] running `Command { std: "docker" "start" "-a" "7be034b35653ebbd4e6a0910eab34f248c315bf1fc92d7cdd686c7f536870a70", kill_on_drop: false }`
[INFO] [stderr] warning: method `merge` is never used
[INFO] [stderr]    --> src/lib.rs:100:8
[INFO] [stderr]     |
[INFO] [stderr]  61 | / impl<T, W> Welford<T, W>
[INFO] [stderr]  62 | | where
[INFO] [stderr]  63 | |     T: Copy + Num + NumAssign + NumCast,
[INFO] [stderr]  64 | |     W: Copy + Num + NumAssign + NumCast + PartialOrd,
[INFO] [stderr]     | |_____________________________________________________- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 100 |       fn merge(&mut self, other: Self) {
[INFO] [stderr]     |          ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `welford` (lib) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/welford-b6f27e430c673012)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::test_merge ... ok
[INFO] [stdout] test tests::test_weighted_welford ... ok
[INFO] [stdout] test tests::test_weighted_merge ... ok
[INFO] [stdout] test tests::test_welford ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests welford
[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" "7be034b35653ebbd4e6a0910eab34f248c315bf1fc92d7cdd686c7f536870a70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7be034b35653ebbd4e6a0910eab34f248c315bf1fc92d7cdd686c7f536870a70", kill_on_drop: false }`
[INFO] [stdout] 7be034b35653ebbd4e6a0910eab34f248c315bf1fc92d7cdd686c7f536870a70