[INFO] fetching crate backtrack 0.3.0...
[INFO] testing backtrack-0.3.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate backtrack 0.3.0 into /workspace/builds/worker-7-tc1/source
[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-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate backtrack 0.3.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate backtrack 0.3.0 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded semver v1.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f755a935af512cb5a0b1afcbc425aa4a778583952952456de8cc6cf47cf5dee4
[INFO] running `Command { std: "docker" "start" "-a" "f755a935af512cb5a0b1afcbc425aa4a778583952952456de8cc6cf47cf5dee4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f755a935af512cb5a0b1afcbc425aa4a778583952952456de8cc6cf47cf5dee4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f755a935af512cb5a0b1afcbc425aa4a778583952952456de8cc6cf47cf5dee4", kill_on_drop: false }`
[INFO] [stdout] f755a935af512cb5a0b1afcbc425aa4a778583952952456de8cc6cf47cf5dee4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 2fff7b43da7bc9ad5efdf80330f0859e17fddc0066a4e771972da392010da29c
[INFO] running `Command { std: "docker" "start" "-a" "2fff7b43da7bc9ad5efdf80330f0859e17fddc0066a4e771972da392010da29c", kill_on_drop: false }`
[INFO] [stderr]    Compiling backtrack v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "2fff7b43da7bc9ad5efdf80330f0859e17fddc0066a4e771972da392010da29c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fff7b43da7bc9ad5efdf80330f0859e17fddc0066a4e771972da392010da29c", kill_on_drop: false }`
[INFO] [stdout] 2fff7b43da7bc9ad5efdf80330f0859e17fddc0066a4e771972da392010da29c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] d6b47a31b672cb07142040341fbed325250cce532b6ddba7ab52d38b96f0e449
[INFO] running `Command { std: "docker" "start" "-a" "d6b47a31b672cb07142040341fbed325250cce532b6ddba7ab52d38b96f0e449", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling semver v1.0.3
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling plotters-backend v0.3.2
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling plotters-svg v0.3.1
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling criterion-plot v0.4.3
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling oorandom v11.1.3
[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 criterion v0.3.4
[INFO] [stderr]    Compiling backtrack v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 57.20s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "d6b47a31b672cb07142040341fbed325250cce532b6ddba7ab52d38b96f0e449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6b47a31b672cb07142040341fbed325250cce532b6ddba7ab52d38b96f0e449", kill_on_drop: false }`
[INFO] [stdout] d6b47a31b672cb07142040341fbed325250cce532b6ddba7ab52d38b96f0e449
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] ec5c934e2fd6a1dd32fcbfea5c8df7789ddbb78304717513d19d416ec6083ce0
[INFO] running `Command { std: "docker" "start" "-a" "ec5c934e2fd6a1dd32fcbfea5c8df7789ddbb78304717513d19d416ec6083ce0", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.4
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/backtrack-f9dc9bac91b8172f)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test problems::count_up::tests::count_up_sat ... ok
[INFO] [stdout] test problems::total_sum::tests::sums_sat3 ... ok
[INFO] [stdout] test problems::total_sum::tests::sums_unsat_too_few ... ok
[INFO] [stdout] test problems::total_sum::tests::sums_unsat_too_many ... ok
[INFO] [stdout] test problems::total_sum::tests::sums_sat4 ... ok
[INFO] [stdout] test problems::count_up::tests::count_up_unsat ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/it/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/it-a9f80bfecb774941)
[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 count_up::total_sum_unsat_unique ... ok
[INFO] [stdout] test n_queens::four_queens_search_sat ... ok
[INFO] [stdout] test total_sum::total_sum_search_sat ... ok
[INFO] [stdout] test n_queens::four_queens_unsat_unique ... ok
[INFO] [stdout] test zero_sized::zero_len_problem ... 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_sized_problem ... ok
[INFO] [stdout] test total_sum::total_sum_search_sat_cached ... ok
[INFO] [stdout] test n_queens::four_queens_search_nodes ... ok
[INFO] [stdout] test zero_sized::zero_sized_len_problem ... ok
[INFO] [stdout] test zero_sized::zero_sized_len_problem_cached ... ok
[INFO] [stdout] test zero_sized::zero_sized_problem_cached ... ok
[INFO] [stdout] test total_sum::total_sum_unsat_unique_cached ... 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 0.16s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ec5c934e2fd6a1dd32fcbfea5c8df7789ddbb78304717513d19d416ec6083ce0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec5c934e2fd6a1dd32fcbfea5c8df7789ddbb78304717513d19d416ec6083ce0", kill_on_drop: false }`
[INFO] [stdout] ec5c934e2fd6a1dd32fcbfea5c8df7789ddbb78304717513d19d416ec6083ce0