[INFO] fetching crate conjecture 0.4.0...
[INFO] testing conjecture-0.4.0 against 1.47.0 for beta-1.48-1
[INFO] extracting crate conjecture 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate conjecture 0.4.0 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1efcf318757ad35d0f151a1d9d5415182e7875c7e4b1715c8de1c853e0a0a4b9
[INFO] running `Command { std: "docker" "start" "-a" "1efcf318757ad35d0f151a1d9d5415182e7875c7e4b1715c8de1c853e0a0a4b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1efcf318757ad35d0f151a1d9d5415182e7875c7e4b1715c8de1c853e0a0a4b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1efcf318757ad35d0f151a1d9d5415182e7875c7e4b1715c8de1c853e0a0a4b9", kill_on_drop: false }`
[INFO] [stdout] 1efcf318757ad35d0f151a1d9d5415182e7875c7e4b1715c8de1c853e0a0a4b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9ab08c976cd969154d082bd0329b6a4604b4a7365c5f087de721179404544510
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9ab08c976cd969154d082bd0329b6a4604b4a7365c5f087de721179404544510", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling cc v1.0.61
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling crypto-hash v0.3.4
[INFO] [stderr]    Compiling conjecture v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/database.rs:17:30
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub type BoxedDatabase = Box<Database>;
[INFO] [stdout]    |                              ^^^^^^^^ help: use `dyn`: `dyn Database`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 let mut minimized_examples = &mut self.minimized_examples;
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine.rs:158:21
[INFO] [stdout]     |
[INFO] [stdout] 158 |                 let mut database = &mut self.database;
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.20s
[INFO] running `Command { std: "docker" "inspect" "9ab08c976cd969154d082bd0329b6a4604b4a7365c5f087de721179404544510", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ab08c976cd969154d082bd0329b6a4604b4a7365c5f087de721179404544510", kill_on_drop: false }`
[INFO] [stdout] 9ab08c976cd969154d082bd0329b6a4604b4a7365c5f087de721179404544510
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb7c88e68e205d5881cf6bcc8791bd307d5b620628be13193d933f89d0abb7b3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bb7c88e68e205d5881cf6bcc8791bd307d5b620628be13193d933f89d0abb7b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/database.rs:17:30
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub type BoxedDatabase = Box<Database>;
[INFO] [stdout]    |                              ^^^^^^^^ help: use `dyn`: `dyn Database`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 let mut minimized_examples = &mut self.minimized_examples;
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine.rs:158:21
[INFO] [stdout]     |
[INFO] [stdout] 158 |                 let mut database = &mut self.database;
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling conjecture v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/database.rs:17:30
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub type BoxedDatabase = Box<Database>;
[INFO] [stdout]    |                              ^^^^^^^^ help: use `dyn`: `dyn Database`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine.rs:157:21
[INFO] [stdout]     |
[INFO] [stdout] 157 |                 let mut minimized_examples = &mut self.minimized_examples;
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine.rs:158:21
[INFO] [stdout]     |
[INFO] [stdout] 158 |                 let mut database = &mut self.database;
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.14s
[INFO] running `Command { std: "docker" "inspect" "bb7c88e68e205d5881cf6bcc8791bd307d5b620628be13193d933f89d0abb7b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb7c88e68e205d5881cf6bcc8791bd307d5b620628be13193d933f89d0abb7b3", kill_on_drop: false }`
[INFO] [stdout] bb7c88e68e205d5881cf6bcc8791bd307d5b620628be13193d933f89d0abb7b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e9922bf9067d6993d1546440562b09cb2972647f0d7da5ee150a7d4863ab9797
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e9922bf9067d6993d1546440562b09cb2972647f0d7da5ee150a7d4863ab9797", kill_on_drop: false }`
[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] warning: 3 warnings emitted
[INFO] [stderr] 
[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] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/conjecture-1e4f60511ba8f14d
[INFO] [stdout] running 7 tests
[INFO] [stdout] test intminimize::tests::sort_bits ... ok
[INFO] [stdout] test intminimize::tests::minimize_down_to ... ok
[INFO] [stdout] test intminimize::tests::unset_relevant_bits ... ok
[INFO] [stdout] test database::tests::can_delete_non_existing_key ... ok
[INFO] [stdout] test database::tests::appears_in_listing_after_saving ... ok
[INFO] [stdout] test engine::tests::minimizes_all_examples ... 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 `Command { std: "docker" "inspect" "e9922bf9067d6993d1546440562b09cb2972647f0d7da5ee150a7d4863ab9797", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9922bf9067d6993d1546440562b09cb2972647f0d7da5ee150a7d4863ab9797", kill_on_drop: false }`
[INFO] [stdout] e9922bf9067d6993d1546440562b09cb2972647f0d7da5ee150a7d4863ab9797
