[INFO] fetching crate backtrack 0.3.0...
[INFO] testing backtrack-0.3.0 against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] extracting crate backtrack 0.3.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate backtrack 0.3.0 on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate backtrack 0.3.0
[INFO] finished tweaking crates.io crate backtrack 0.3.0
[INFO] tweaked toml for crates.io crate backtrack 0.3.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate backtrack 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3e170b4047ebe8a2c69260ba65ac2d360c947f032d5dfa1fab77553b1341477
[INFO] running `Command { std: "docker" "start" "-a" "f3e170b4047ebe8a2c69260ba65ac2d360c947f032d5dfa1fab77553b1341477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3e170b4047ebe8a2c69260ba65ac2d360c947f032d5dfa1fab77553b1341477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3e170b4047ebe8a2c69260ba65ac2d360c947f032d5dfa1fab77553b1341477", kill_on_drop: false }`
[INFO] [stdout] f3e170b4047ebe8a2c69260ba65ac2d360c947f032d5dfa1fab77553b1341477
[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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f39b578161dd347d37c8879b7a8f7050f4385065b8ab138bd5a1cd1c51f2f677
[INFO] running `Command { std: "docker" "start" "-a" "f39b578161dd347d37c8879b7a8f7050f4385065b8ab138bd5a1cd1c51f2f677", kill_on_drop: false }`
[INFO] [stderr]    Compiling backtrack v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "f39b578161dd347d37c8879b7a8f7050f4385065b8ab138bd5a1cd1c51f2f677", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f39b578161dd347d37c8879b7a8f7050f4385065b8ab138bd5a1cd1c51f2f677", kill_on_drop: false }`
[INFO] [stdout] f39b578161dd347d37c8879b7a8f7050f4385065b8ab138bd5a1cd1c51f2f677
[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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a1acab73c72e62c745fa31cd2f92942d4f198f48200bf3039fab7560d02383b
[INFO] running `Command { std: "docker" "start" "-a" "1a1acab73c72e62c745fa31cd2f92942d4f198f48200bf3039fab7560d02383b", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling semver v1.0.3
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling plotters-backend v0.3.2
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling plotters-svg v0.3.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling serde_cbor v0.11.1
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling criterion v0.3.4
[INFO] [stderr]    Compiling backtrack v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 31.36s
[INFO] running `Command { std: "docker" "inspect" "1a1acab73c72e62c745fa31cd2f92942d4f198f48200bf3039fab7560d02383b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a1acab73c72e62c745fa31cd2f92942d4f198f48200bf3039fab7560d02383b", kill_on_drop: false }`
[INFO] [stdout] 1a1acab73c72e62c745fa31cd2f92942d4f198f48200bf3039fab7560d02383b
[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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8f58cc8adb2631be7e70f9b6d79f29039f430baf5ccb56e7813411f5ec9d3952
[INFO] running `Command { std: "docker" "start" "-a" "8f58cc8adb2631be7e70f9b6d79f29039f430baf5ccb56e7813411f5ec9d3952", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/backtrack-a644a86e8b5f7672)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test problems::total_sum::tests::sums_unsat_too_few ... ok
[INFO] [stdout] test problems::count_up::tests::count_up_sat ... ok
[INFO] [stdout] test problems::count_up::tests::count_up_unsat ... ok
[INFO] [stdout] test problems::total_sum::tests::sums_sat3 ... ok
[INFO] [stdout] test problems::total_sum::tests::sums_sat4 ... ok
[INFO] [stdout] test problems::total_sum::tests::sums_unsat_too_many ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/it/main.rs (/opt/rustwide/target/debug/deps/it-afae072020817e3e)
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test bit_queens::tiny_bit_at_least ... ok
[INFO] [stdout] test count_up::count_up_search_sat ... ok
[INFO] [stdout] test count_up::count_up_search_nosat ... ok
[INFO] [stdout] test n_queens::four_queens_search_nodes ... ok
[INFO] [stdout] test total_sum::total_sum_unsat_unique_cached ... ok
[INFO] [stdout] test total_sum::total_sum_search_sat_cached ... ok
[INFO] [stdout] test total_sum::total_sum_unsat_unique ... ok
[INFO] [stdout] test zero_sized::zero_len_problem_cached ... ok
[INFO] [stdout] test zero_sized::zero_len_problem ... ok
[INFO] [stdout] test zero_sized::zero_sized_len_problem ... ok
[INFO] [stdout] test n_queens::four_queens_search_sat ... ok
[INFO] [stdout] test count_up::total_sum_unsat_unique ... ok
[INFO] [stdout] test n_queens::four_queens_unsat_unique ... ok
[INFO] [stdout] test zero_sized::zero_sized_len_problem_cached ... ok
[INFO] [stdout] test zero_sized::zero_sized_problem ... ok
[INFO] [stdout] test zero_sized::zero_sized_problem_cached ... ok
[INFO] [stdout] test total_sum::total_sum_search_sat ... ok
[INFO] [stdout] test bit_queens::equivalent_n_queens ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.31s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests backtrack
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 23) ... ok
[INFO] [stdout] test src/lib.rs - (line 61) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.66s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8f58cc8adb2631be7e70f9b6d79f29039f430baf5ccb56e7813411f5ec9d3952", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f58cc8adb2631be7e70f9b6d79f29039f430baf5ccb56e7813411f5ec9d3952", kill_on_drop: false }`
[INFO] [stdout] 8f58cc8adb2631be7e70f9b6d79f29039f430baf5ccb56e7813411f5ec9d3952