[INFO] fetching crate acid-state 0.2.3...
[INFO] testing acid-state-0.2.3 against 1.59.0 for beta-1.60-1
[INFO] extracting crate acid-state 0.2.3 into /workspace/builds/worker-119/source
[INFO] validating manifest of crates.io crate acid-state 0.2.3 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate acid-state 0.2.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate acid-state 0.2.3
[INFO] tweaked toml for crates.io crate acid-state 0.2.3 written to /workspace/builds/worker-119/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 410cf6dd83a168bdf4a9a676bc9790431ee70db83cf12cd415b45374d3a8a7f3
[INFO] running `Command { std: "docker" "start" "-a" "410cf6dd83a168bdf4a9a676bc9790431ee70db83cf12cd415b45374d3a8a7f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "410cf6dd83a168bdf4a9a676bc9790431ee70db83cf12cd415b45374d3a8a7f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "410cf6dd83a168bdf4a9a676bc9790431ee70db83cf12cd415b45374d3a8a7f3", kill_on_drop: false }`
[INFO] [stdout] 410cf6dd83a168bdf4a9a676bc9790431ee70db83cf12cd415b45374d3a8a7f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fbf87c1546047827ba9e566660c5210291c751cd3cab0a43c16d44eb50089524
[INFO] running `Command { std: "docker" "start" "-a" "fbf87c1546047827ba9e566660c5210291c751cd3cab0a43c16d44eb50089524", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling serde v0.7.15
[INFO] [stderr]    Compiling byteorder v0.5.3
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling bincode v0.5.9
[INFO] [stderr]    Compiling acid-state v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clear`
[INFO] [stdout]   --> src/wrapper_structs.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn clear(&self) -> io::Result<()> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/wrapper_structs.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |         f.sync_all();
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/wrapper_structs.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         self.write();
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.35s
[INFO] running `Command { std: "docker" "inspect" "fbf87c1546047827ba9e566660c5210291c751cd3cab0a43c16d44eb50089524", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbf87c1546047827ba9e566660c5210291c751cd3cab0a43c16d44eb50089524", kill_on_drop: false }`
[INFO] [stdout] fbf87c1546047827ba9e566660c5210291c751cd3cab0a43c16d44eb50089524
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8336b8ece00d4648e23b27c37e30477f1179c071bce3334e189dd659b13f4cbc
[INFO] running `Command { std: "docker" "start" "-a" "8336b8ece00d4648e23b27c37e30477f1179c071bce3334e189dd659b13f4cbc", kill_on_drop: false }`
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clear`
[INFO] [stdout]   --> src/wrapper_structs.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn clear(&self) -> io::Result<()> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/wrapper_structs.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |         f.sync_all();
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/wrapper_structs.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         self.write();
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling acid-state v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stdout]  --> test/test.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Debug, RustcDecodable, RustcEncodable)]
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `RustcEncodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stdout]  --> test/test.rs:9:33
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[derive(Debug, RustcDecodable, RustcEncodable)]
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> test/test.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | / acid_state! {
[INFO] [stdout] 15 | |     A: HashMap<String, u64> = HashMap::new();
[INFO] [stdout] 16 | |     B: u64 = 0;
[INFO] [stdout] 17 | |     C: Cs = Cs {
[INFO] [stdout] 18 | |         v: 0
[INFO] [stdout] 19 | |     };
[INFO] [stdout] 20 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> test/test.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | / acid_state! {
[INFO] [stdout] 15 | |     A: HashMap<String, u64> = HashMap::new();
[INFO] [stdout] 16 | |     B: u64 = 0;
[INFO] [stdout] 17 | |     C: Cs = Cs {
[INFO] [stdout] 18 | |         v: 0
[INFO] [stdout] 19 | |     };
[INFO] [stdout] 20 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> test/test.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | / acid_state! {
[INFO] [stdout] 15 | |     A: HashMap<String, u64> = HashMap::new();
[INFO] [stdout] 16 | |     B: u64 = 0;
[INFO] [stdout] 17 | |     C: Cs = Cs {
[INFO] [stdout] 18 | |         v: 0
[INFO] [stdout] 19 | |     };
[INFO] [stdout] 20 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:49:1
[INFO] [stdout]    |
[INFO] [stdout] 49 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> test/test.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |             let mut current = a.entry(key).or_insert(0);
[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: associated function is never used: `clear`
[INFO] [stdout]   --> src/wrapper_structs.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn clear(&self) -> io::Result<()> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/wrapper_structs.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |         f.sync_all();
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/wrapper_structs.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         self.write();
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "8336b8ece00d4648e23b27c37e30477f1179c071bce3334e189dd659b13f4cbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8336b8ece00d4648e23b27c37e30477f1179c071bce3334e189dd659b13f4cbc", kill_on_drop: false }`
[INFO] [stdout] 8336b8ece00d4648e23b27c37e30477f1179c071bce3334e189dd659b13f4cbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2742a551d557151a5fdfee0e2ab1b78d1dd2ad08739e31d17946e8019534e051
[INFO] running `Command { std: "docker" "start" "-a" "2742a551d557151a5fdfee0e2ab1b78d1dd2ad08739e31d17946e8019534e051", kill_on_drop: false }`
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `clear`
[INFO] [stderr]   --> src/wrapper_structs.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn clear(&self) -> io::Result<()> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/wrapper_structs.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |         f.sync_all();
[INFO] [stderr]    |         ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/wrapper_structs.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         self.write();
[INFO] [stderr]    |         ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `acid-state` (lib) generated 4 warnings
[INFO] [stderr] warning: `acid-state` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr] warning: use of deprecated macro `RustcDecodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stderr]  --> test/test.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[derive(Debug, RustcDecodable, RustcEncodable)]
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `RustcEncodable`: rustc-serialize is deprecated and no longer supported
[INFO] [stderr]  --> test/test.rs:9:33
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[derive(Debug, RustcDecodable, RustcEncodable)]
[INFO] [stderr]   |                                 ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]   --> test/test.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | / acid_state! {
[INFO] [stderr] 15 | |     A: HashMap<String, u64> = HashMap::new();
[INFO] [stderr] 16 | |     B: u64 = 0;
[INFO] [stderr] 17 | |     C: Cs = Cs {
[INFO] [stderr] 18 | |         v: 0
[INFO] [stdout] 
[INFO] [stderr] 19 | |     };
[INFO] [stdout] running 0 tests
[INFO] [stderr] 20 | | }
[INFO] [stdout] 
[INFO] [stderr]    | |_^
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr]    = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> test/test.rs:28:17
[INFO] [stderr]    |
[INFO] [stderr] 28 |             let mut current = a.entry(key).or_insert(0);
[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: `acid-state` (test "test") generated 6 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/acid_state-358af2317172dc1d)
[INFO] [stderr]      Running test/test.rs (/opt/rustwide/target/debug/deps/test-902f6af2dfb993e0)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] thread panicked while panicking. aborting.
[INFO] [stderr] error: test failed, to rerun pass '--test test'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/test-902f6af2dfb993e0` (signal: 4, SIGILL: illegal instruction)
[INFO] running `Command { std: "docker" "inspect" "2742a551d557151a5fdfee0e2ab1b78d1dd2ad08739e31d17946e8019534e051", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2742a551d557151a5fdfee0e2ab1b78d1dd2ad08739e31d17946e8019534e051", kill_on_drop: false }`
[INFO] [stdout] 2742a551d557151a5fdfee0e2ab1b78d1dd2ad08739e31d17946e8019534e051