[INFO] crate conjecture 0.4.0 is already in cache
[INFO] testing conjecture-0.4.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate conjecture 0.4.0 into work/builds/worker-3/source
[INFO] validating manifest of crates.io crate conjecture 0.4.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate conjecture 0.4.0
[INFO] finished tweaking crates.io crate conjecture 0.4.0
[INFO] tweaked toml for crates.io crate conjecture 0.4.0 written to work/builds/worker-3/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 0fbd7047ef0731e93c9ca8dc564018771418b0f45c9f45145a6a6b4bc637605b
[INFO] running `"docker" "start" "-a" "0fbd7047ef0731e93c9ca8dc564018771418b0f45c9f45145a6a6b4bc637605b"`
[INFO] [stderr]    Compiling conjecture v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/database.rs:17:30
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub type BoxedDatabase = Box<Database>;
[INFO] [stderr]    |                              ^^^^^^^^ help: use `dyn`: `dyn Database`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine.rs:157:21
[INFO] [stderr]     |
[INFO] [stderr] 157 |                 let mut minimized_examples = &mut self.minimized_examples;
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine.rs:158:21
[INFO] [stderr]     |
[INFO] [stderr] 158 |                 let mut database = &mut self.database;
[INFO] [stderr]     |                     ----^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.87s
[INFO] running `"docker" "inspect" "0fbd7047ef0731e93c9ca8dc564018771418b0f45c9f45145a6a6b4bc637605b"`
[INFO] running `"docker" "rm" "-f" "0fbd7047ef0731e93c9ca8dc564018771418b0f45c9f45145a6a6b4bc637605b"`
[INFO] [stdout] 0fbd7047ef0731e93c9ca8dc564018771418b0f45c9f45145a6a6b4bc637605b
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 308e6bbd909be4f619f3281f6b0e8491c9b76b0f272d2c9b94132b0298722bec
[INFO] running `"docker" "start" "-a" "308e6bbd909be4f619f3281f6b0e8491c9b76b0f272d2c9b94132b0298722bec"`
[INFO] [stderr]    Compiling conjecture v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/database.rs:17:30
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub type BoxedDatabase = Box<Database>;
[INFO] [stderr]    |                              ^^^^^^^^ help: use `dyn`: `dyn Database`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine.rs:157:21
[INFO] [stderr]     |
[INFO] [stderr] 157 |                 let mut minimized_examples = &mut self.minimized_examples;
[INFO] [stderr]     |                     ----^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine.rs:158:21
[INFO] [stderr]     |
[INFO] [stderr] 158 |                 let mut database = &mut self.database;
[INFO] [stderr]     |                     ----^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.85s
[INFO] running `"docker" "inspect" "308e6bbd909be4f619f3281f6b0e8491c9b76b0f272d2c9b94132b0298722bec"`
[INFO] running `"docker" "rm" "-f" "308e6bbd909be4f619f3281f6b0e8491c9b76b0f272d2c9b94132b0298722bec"`
[INFO] [stdout] 308e6bbd909be4f619f3281f6b0e8491c9b76b0f272d2c9b94132b0298722bec
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] ff2a26f5359c4dbe2f51c39ae6f2d8c4d3ece9b0aa6263d0c6ce35623870749b
[INFO] running `"docker" "start" "-a" "ff2a26f5359c4dbe2f51c39ae6f2d8c4d3ece9b0aa6263d0c6ce35623870749b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/conjecture-d71710a84f5a4655
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test intminimize::tests::minimize_down_to ... ok
[INFO] [stdout] test intminimize::tests::unset_relevant_bits ... ok
[INFO] [stdout] test intminimize::tests::sort_bits ... ok
[INFO] [stdout] test database::tests::can_delete_non_existing_key ... ok
[INFO] [stdout] test engine::tests::minimizes_all_examples ... ok
[INFO] [stdout] test database::tests::appears_in_listing_after_saving ... ok
[INFO] [stdout] test database::tests::can_delete_key ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests conjecture
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ff2a26f5359c4dbe2f51c39ae6f2d8c4d3ece9b0aa6263d0c6ce35623870749b"`
[INFO] running `"docker" "rm" "-f" "ff2a26f5359c4dbe2f51c39ae6f2d8c4d3ece9b0aa6263d0c6ce35623870749b"`
[INFO] [stdout] ff2a26f5359c4dbe2f51c39ae6f2d8c4d3ece9b0aa6263d0c6ce35623870749b