[INFO] cloning repository https://github.com/ajfrantz/advent2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ajfrantz/advent2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajfrantz%2Fadvent2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajfrantz%2Fadvent2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e142839799b03d3b8299bed6e4f1d93e2b1193f3
[INFO] testing ajfrantz/advent2018 against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fajfrantz%2Fadvent2018" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ajfrantz/advent2018 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ajfrantz/advent2018
[INFO] finished tweaking git repo https://github.com/ajfrantz/advent2018
[INFO] tweaked toml for git repo https://github.com/ajfrantz/advent2018 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/ajfrantz/advent2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded once_cell v0.1.6
[INFO] [stderr]   Downloaded cached v0.8.0
[INFO] [stderr]   Downloaded pathfinding v1.1.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 844258f4ed8546d219c3ff5805d4b0a409dc192a124ada7b2092f2e6aaeb0cab
[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" "844258f4ed8546d219c3ff5805d4b0a409dc192a124ada7b2092f2e6aaeb0cab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "844258f4ed8546d219c3ff5805d4b0a409dc192a124ada7b2092f2e6aaeb0cab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "844258f4ed8546d219c3ff5805d4b0a409dc192a124ada7b2092f2e6aaeb0cab", kill_on_drop: false }`
[INFO] [stdout] 844258f4ed8546d219c3ff5805d4b0a409dc192a124ada7b2092f2e6aaeb0cab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42d77d265693660f3e81d70d84a2b1eedde7a3e6cd864735231bf2fa3377069c
[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" "42d77d265693660f3e81d70d84a2b1eedde7a3e6cd864735231bf2fa3377069c", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling failure_derive v0.1.4
[INFO] [stderr]    Compiling rustc-demangle v0.1.11
[INFO] [stderr]    Compiling slotmap v0.3.0
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling pathfinding v1.1.10
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling once_cell v0.1.6
[INFO] [stderr]    Compiling cached v0.8.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure v0.1.4
[INFO] [stderr]    Compiling advent2018 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `draw`
[INFO] [stdout]   --> src/bin/22.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn draw(grid: &Vec<Vec<RegionType>>) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `machine` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/bin/21.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 133 |         if let Some(instruction) = machine.instructions.get(ip) {
[INFO] [stdout]     |                                    -------------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 159 |             machine.execute(
[INFO] [stdout]     |             ^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 160 |                 instruction.opcode,
[INFO] [stdout]     |                 ------------------ immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `machine` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/bin/19.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         if let Some(instruction) = machine.instructions.get(ip) {
[INFO] [stdout]     |                                    -------------------- immutable borrow occurs here
[INFO] [stdout] 141 |             machine.execute(
[INFO] [stdout]     |             ^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 142 |                 instruction.opcode,
[INFO] [stdout]     |                 ------------------ immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]    --> src/bin/15.rs:150:14
[INFO] [stdout]     |
[INFO] [stdout] 150 |             .into_iter()
[INFO] [stdout]     |              ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/bin/23.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         (dx + dy + dz)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.10s
[INFO] running `Command { std: "docker" "inspect" "42d77d265693660f3e81d70d84a2b1eedde7a3e6cd864735231bf2fa3377069c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42d77d265693660f3e81d70d84a2b1eedde7a3e6cd864735231bf2fa3377069c", kill_on_drop: false }`
[INFO] [stdout] 42d77d265693660f3e81d70d84a2b1eedde7a3e6cd864735231bf2fa3377069c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4884de02b93c551ba32438c2cd227fd82c9e89d4bf7ce4a96f334d6124aec25
[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" "a4884de02b93c551ba32438c2cd227fd82c9e89d4bf7ce4a96f334d6124aec25", kill_on_drop: false }`
[INFO] [stderr]    Compiling advent2018 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/bin/23.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |         (dx + dy + dz)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `machine` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/bin/19.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         if let Some(instruction) = machine.instructions.get(ip) {
[INFO] [stdout]     |                                    -------------------- immutable borrow occurs here
[INFO] [stdout] 141 |             machine.execute(
[INFO] [stdout]     |             ^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 142 |                 instruction.opcode,
[INFO] [stdout]     |                 ------------------ immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `draw`
[INFO] [stdout]   --> src/bin/22.rs:52:4
[INFO] [stdout]    |
[INFO] [stdout] 52 | fn draw(grid: &Vec<Vec<RegionType>>) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]    --> src/bin/15.rs:150:14
[INFO] [stdout]     |
[INFO] [stdout] 150 |             .into_iter()
[INFO] [stdout]     |              ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `machine` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/bin/21.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 133 |         if let Some(instruction) = machine.instructions.get(ip) {
[INFO] [stdout]     |                                    -------------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 159 |             machine.execute(
[INFO] [stdout]     |             ^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 160 |                 instruction.opcode,
[INFO] [stdout]     |                 ------------------ immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.36s
[INFO] running `Command { std: "docker" "inspect" "a4884de02b93c551ba32438c2cd227fd82c9e89d4bf7ce4a96f334d6124aec25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4884de02b93c551ba32438c2cd227fd82c9e89d4bf7ce4a96f334d6124aec25", kill_on_drop: false }`
[INFO] [stdout] a4884de02b93c551ba32438c2cd227fd82c9e89d4bf7ce4a96f334d6124aec25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d46cece219fdd724aad3e3095373383bf5cb332a53fcfc6d2db44877c2065d0c
[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" "d46cece219fdd724aad3e3095373383bf5cb332a53fcfc6d2db44877c2065d0c", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/bin/23.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |         (dx + dy + dz)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `draw`
[INFO] [stderr]   --> src/bin/22.rs:52:4
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn draw(grid: &Vec<Vec<RegionType>>) {
[INFO] [stderr]    |    ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]    --> src/bin/15.rs:150:14
[INFO] [stderr]     |
[INFO] [stderr] 150 |             .into_iter()
[INFO] [stderr]     |              ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `machine` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/bin/21.rs:159:13
[INFO] [stderr]     |
[INFO] [stderr] 133 |         if let Some(instruction) = machine.instructions.get(ip) {
[INFO] [stderr]     |                                    -------------------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 159 |             machine.execute(
[INFO] [stderr]     |             ^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 160 |                 instruction.opcode,
[INFO] [stderr]     |                 ------------------ immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `machine` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/bin/19.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 140 |         if let Some(instruction) = machine.instructions.get(ip) {
[INFO] [stderr]     |                                    -------------------- immutable borrow occurs here
[INFO] [stderr] 141 |             machine.execute(
[INFO] [stderr]     |             ^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 142 |                 instruction.opcode,
[INFO] [stderr]     |                 ------------------ immutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.27s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/1-477d38ccbc4b00f3
[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] [stderr]      Running /opt/rustwide/target/debug/deps/10-993b52843b4f4680
[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] [stderr]      Running /opt/rustwide/target/debug/deps/11-be947744134c7867
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/12-3d3bf2ccc879497d
[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] [stderr]      Running /opt/rustwide/target/debug/deps/13-fa492e01d130ba30
[INFO] [stdout] 
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/14-aedfddf9e69f19ef
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/15-8d35d0a460f5e9f9
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/16-d23e9f75db07ef2e
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/17-0a3dfe4ddbd4be70
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/18-345863138ad98967
[INFO] [stdout] 
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/19-46977e6589f229ce
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/2-c838859a8dc09a7e
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/20-4c66a444a712414c
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[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/21-d88b9d65549ab7be
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/22-1d0408ccab463134
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/23-aa5a0a06aedd4279
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/24-b178a93b6d030c72
[INFO] [stdout] running 0 tests
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[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/25-3e4d7563fe7477c0
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/3-64ef38fbe666010d
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/4-02c07d1e67de3f80
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/5-59a0cc3fb9ace19a
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/6-a58895510a559266
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/7-6233455c045d4a6a
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/8-a886b275e9248d2d
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[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/9-735a9f83093f9721
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[INFO] running `Command { std: "docker" "inspect" "d46cece219fdd724aad3e3095373383bf5cb332a53fcfc6d2db44877c2065d0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d46cece219fdd724aad3e3095373383bf5cb332a53fcfc6d2db44877c2065d0c", kill_on_drop: false }`
[INFO] [stdout] d46cece219fdd724aad3e3095373383bf5cb332a53fcfc6d2db44877c2065d0c
