[INFO] fetching crate jazz 0.2.2...
[INFO] testing jazz-0.2.2 against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] extracting crate jazz 0.2.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate jazz 0.2.2 on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jazz 0.2.2
[INFO] finished tweaking crates.io crate jazz 0.2.2
[INFO] tweaked toml for crates.io crate jazz 0.2.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1607df84192d305eb0e7c0f1cc474e1f0c86ac9e1223262b36d28d544e8172d4
[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" "1607df84192d305eb0e7c0f1cc474e1f0c86ac9e1223262b36d28d544e8172d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1607df84192d305eb0e7c0f1cc474e1f0c86ac9e1223262b36d28d544e8172d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1607df84192d305eb0e7c0f1cc474e1f0c86ac9e1223262b36d28d544e8172d4", kill_on_drop: false }`
[INFO] [stdout] 1607df84192d305eb0e7c0f1cc474e1f0c86ac9e1223262b36d28d544e8172d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", 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] f13cd005d8f2fbf3d40109fc042bf52ad59e15e877023be06adf08e7ce9e97fe
[INFO] running `Command { std: "docker" "start" "-a" "f13cd005d8f2fbf3d40109fc042bf52ad59e15e877023be06adf08e7ce9e97fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling jazz v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/machine.rs:461:73
[INFO] [stdout]     |
[INFO] [stdout] 461 |                         obj.store_at(self, vec![target, key, value], 0);;
[INFO] [stdout]     |                                                                         ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:404:25
[INFO] [stdout]     |
[INFO] [stdout] 403 |                         let value = self.globals.get(index).unwrap();
[INFO] [stdout]     |                                     ------------ immutable borrow occurs here
[INFO] [stdout] 404 |                         self.set(*reg, *value);
[INFO] [stdout]     |                         ^^^^           ------ immutable borrow later used here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         mutable borrow occurs 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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:344:33
[INFO] [stdout]     |
[INFO] [stdout] 343 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 344 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:377:33
[INFO] [stdout]     |
[INFO] [stdout] 376 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 377 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:354:33
[INFO] [stdout]     |
[INFO] [stdout] 353 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 354 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:364:33
[INFO] [stdout]     |
[INFO] [stdout] 363 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 364 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:312:25
[INFO] [stdout]     |
[INFO] [stdout] 311 |                         let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                   ----------- immutable borrow occurs here
[INFO] [stdout] 312 |                         self.branch(*idx);
[INFO] [stdout]     |                         ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:323:33
[INFO] [stdout]     |
[INFO] [stdout] 322 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 323 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:333:33
[INFO] [stdout]     |
[INFO] [stdout] 332 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 333 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.98s
[INFO] running `Command { std: "docker" "inspect" "f13cd005d8f2fbf3d40109fc042bf52ad59e15e877023be06adf08e7ce9e97fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f13cd005d8f2fbf3d40109fc042bf52ad59e15e877023be06adf08e7ce9e97fe", kill_on_drop: false }`
[INFO] [stdout] f13cd005d8f2fbf3d40109fc042bf52ad59e15e877023be06adf08e7ce9e97fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 178e1831637a30ed232f20987ce581bfae7f597ba60be59ed15a561eac9d068b
[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" "178e1831637a30ed232f20987ce581bfae7f597ba60be59ed15a561eac9d068b", kill_on_drop: false }`
[INFO] [stderr]    Compiling jazz v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/machine.rs:461:73
[INFO] [stdout]     |
[INFO] [stdout] 461 |                         obj.store_at(self, vec![target, key, value], 0);;
[INFO] [stdout]     |                                                                         ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:404:25
[INFO] [stdout]     |
[INFO] [stdout] 403 |                         let value = self.globals.get(index).unwrap();
[INFO] [stdout]     |                                     ------------ immutable borrow occurs here
[INFO] [stdout] 404 |                         self.set(*reg, *value);
[INFO] [stdout]     |                         ^^^^           ------ immutable borrow later used here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         mutable borrow occurs 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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:344:33
[INFO] [stdout]     |
[INFO] [stdout] 343 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 344 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:377:33
[INFO] [stdout]     |
[INFO] [stdout] 376 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 377 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:354:33
[INFO] [stdout]     |
[INFO] [stdout] 353 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 354 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:364:33
[INFO] [stdout]     |
[INFO] [stdout] 363 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 364 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:312:25
[INFO] [stdout]     |
[INFO] [stdout] 311 |                         let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                   ----------- immutable borrow occurs here
[INFO] [stdout] 312 |                         self.branch(*idx);
[INFO] [stdout]     |                         ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:323:33
[INFO] [stdout]     |
[INFO] [stdout] 322 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 323 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:333:33
[INFO] [stdout]     |
[INFO] [stdout] 332 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 333 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/machine.rs:461:73
[INFO] [stdout]     |
[INFO] [stdout] 461 |                         obj.store_at(self, vec![target, key, value], 0);;
[INFO] [stdout]     |                                                                         ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:404:25
[INFO] [stdout]     |
[INFO] [stdout] 403 |                         let value = self.globals.get(index).unwrap();
[INFO] [stdout]     |                                     ------------ immutable borrow occurs here
[INFO] [stdout] 404 |                         self.set(*reg, *value);
[INFO] [stdout]     |                         ^^^^           ------ immutable borrow later used here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         mutable borrow occurs 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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:344:33
[INFO] [stdout]     |
[INFO] [stdout] 343 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 344 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:377:33
[INFO] [stdout]     |
[INFO] [stdout] 376 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 377 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:354:33
[INFO] [stdout]     |
[INFO] [stdout] 353 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 354 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:364:33
[INFO] [stdout]     |
[INFO] [stdout] 363 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 364 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:312:25
[INFO] [stdout]     |
[INFO] [stdout] 311 |                         let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                   ----------- immutable borrow occurs here
[INFO] [stdout] 312 |                         self.branch(*idx);
[INFO] [stdout]     |                         ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:323:33
[INFO] [stdout]     |
[INFO] [stdout] 322 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 323 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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 `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/machine.rs:333:33
[INFO] [stdout]     |
[INFO] [stdout] 332 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stdout]     |                                 ----------- immutable borrow occurs here
[INFO] [stdout] 333 | ...                   self.branch(*idx);
[INFO] [stdout]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       mutable borrow occurs here
[INFO] [stdout]     |
[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: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "178e1831637a30ed232f20987ce581bfae7f597ba60be59ed15a561eac9d068b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "178e1831637a30ed232f20987ce581bfae7f597ba60be59ed15a561eac9d068b", kill_on_drop: false }`
[INFO] [stdout] 178e1831637a30ed232f20987ce581bfae7f597ba60be59ed15a561eac9d068b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", 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] e978b381cf3d2442b5b3b2fca36b48e765537bec0e776f8e6e909fe95fe03bc8
[INFO] running `Command { std: "docker" "start" "-a" "e978b381cf3d2442b5b3b2fca36b48e765537bec0e776f8e6e909fe95fe03bc8", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/machine.rs:461:73
[INFO] [stderr]     |
[INFO] [stderr] 461 |                         obj.store_at(self, vec![target, key, value], 0);;
[INFO] [stderr]     |                                                                         ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:404:25
[INFO] [stderr]     |
[INFO] [stderr] 403 |                         let value = self.globals.get(index).unwrap();
[INFO] [stderr]     |                                     ------------ immutable borrow occurs here
[INFO] [stderr] 404 |                         self.set(*reg, *value);
[INFO] [stderr]     |                         ^^^^           ------ immutable borrow later used here
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         mutable borrow occurs 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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:344:33
[INFO] [stderr]     |
[INFO] [stderr] 343 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 344 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:377:33
[INFO] [stderr]     |
[INFO] [stderr] 376 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 377 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:354:33
[INFO] [stderr]     |
[INFO] [stderr] 353 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 354 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:364:33
[INFO] [stderr]     |
[INFO] [stderr] 363 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 364 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:312:25
[INFO] [stderr]     |
[INFO] [stderr] 311 |                         let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                   ----------- immutable borrow occurs here
[INFO] [stderr] 312 |                         self.branch(*idx);
[INFO] [stderr]     |                         ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:323:33
[INFO] [stderr]     |
[INFO] [stderr] 322 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 323 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:333:33
[INFO] [stderr]     |
[INFO] [stderr] 332 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 333 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/machine.rs:461:73
[INFO] [stderr]     |
[INFO] [stderr] 461 |                         obj.store_at(self, vec![target, key, value], 0);;
[INFO] [stderr]     |                                                                         ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:404:25
[INFO] [stderr]     |
[INFO] [stderr] 403 |                         let value = self.globals.get(index).unwrap();
[INFO] [stderr]     |                                     ------------ immutable borrow occurs here
[INFO] [stderr] 404 |                         self.set(*reg, *value);
[INFO] [stderr]     |                         ^^^^           ------ immutable borrow later used here
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         mutable borrow occurs 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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:344:33
[INFO] [stderr]     |
[INFO] [stderr] 343 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 344 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:377:33
[INFO] [stderr]     |
[INFO] [stderr] 376 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 377 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:354:33
[INFO] [stderr]     |
[INFO] [stderr] 353 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 354 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:364:33
[INFO] [stderr]     |
[INFO] [stderr] 363 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 364 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:312:25
[INFO] [stderr]     |
[INFO] [stderr] 311 |                         let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                   ----------- immutable borrow occurs here
[INFO] [stderr] 312 |                         self.branch(*idx);
[INFO] [stderr]     |                         ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:323:33
[INFO] [stderr]     |
[INFO] [stderr] 322 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 323 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stderr]    --> src/machine.rs:333:33
[INFO] [stderr]     |
[INFO] [stderr] 332 | ...                   let idx = self.labels.get(lbl_id).unwrap();
[INFO] [stderr]     |                                 ----------- immutable borrow occurs here
[INFO] [stderr] 333 | ...                   self.branch(*idx);
[INFO] [stderr]     |                       ^^^^        ---- immutable borrow later used here
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       mutable borrow occurs here
[INFO] [stderr]     |
[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: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/jazz-71480a75eb521fa2)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/jazz-cea80d62bdc08464)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/factorial.rs (/opt/rustwide/target/debug/deps/factorial-4c570083a43a0ac7)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]      Running tests/load_at.rs (/opt/rustwide/target/debug/deps/load_at-1094936c5417570e)
[INFO] [stdout] 
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test factorial ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/store_at_load_at.rs (/opt/rustwide/target/debug/deps/store_at_load_at-9d06ecf3eb21914f)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test load_at ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests jazz
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test load_at_and_store_at ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> /opt/rustwide/workdir/src/machine.rs:461:73
[INFO] [stderr]     |
[INFO] [stderr] 461 |                         obj.store_at(self, vec![target, key, value], 0);;
[INFO] [stderr]     |                                                                         ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stdout] running 0 tests
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e978b381cf3d2442b5b3b2fca36b48e765537bec0e776f8e6e909fe95fe03bc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e978b381cf3d2442b5b3b2fca36b48e765537bec0e776f8e6e909fe95fe03bc8", kill_on_drop: false }`
[INFO] [stdout] e978b381cf3d2442b5b3b2fca36b48e765537bec0e776f8e6e909fe95fe03bc8