[INFO] cloning repository https://github.com/codec-abc/synacor-challenge-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/codec-abc/synacor-challenge-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodec-abc%2Fsynacor-challenge-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodec-abc%2Fsynacor-challenge-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8106355e9b1dc3a97f41e0c79ff83a12e31d792e
[INFO] testing codec-abc/synacor-challenge-rust against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcodec-abc%2Fsynacor-challenge-rust" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/codec-abc/synacor-challenge-rust on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/codec-abc/synacor-challenge-rust
[INFO] finished tweaking git repo https://github.com/codec-abc/synacor-challenge-rust
[INFO] tweaked toml for git repo https://github.com/codec-abc/synacor-challenge-rust written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/codec-abc/synacor-challenge-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f367bce00f5e67a6698753b22b4e9089130de3deeb8359c97c2be0f5b378f76
[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" "8f367bce00f5e67a6698753b22b4e9089130de3deeb8359c97c2be0f5b378f76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f367bce00f5e67a6698753b22b4e9089130de3deeb8359c97c2be0f5b378f76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f367bce00f5e67a6698753b22b4e9089130de3deeb8359c97c2be0f5b378f76", kill_on_drop: false }`
[INFO] [stdout] 8f367bce00f5e67a6698753b22b4e9089130de3deeb8359c97c2be0f5b378f76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51973682b1038fafce598c14048617f2303590c715eb0a9775ff4c17b5a24973
[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" "51973682b1038fafce598c14048617f2303590c715eb0a9775ff4c17b5a24973", kill_on_drop: false }`
[INFO] [stderr]    Compiling synacor_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:231:51
[INFO] [stdout]     |
[INFO] [stdout] 231 |     let register_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:232:48
[INFO] [stdout]     |
[INFO] [stdout] 232 |     let value_result = read_mem_as_u16_le(mem, (offset + 2));
[INFO] [stdout]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:256:48
[INFO] [stdout]     |
[INFO] [stdout] 256 |     let value_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stdout]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:275:48
[INFO] [stdout]     |
[INFO] [stdout] 275 |     let value_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stdout]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:294:47
[INFO] [stdout]     |
[INFO] [stdout] 294 |     let cell_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stdout]     |                                               ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:295:56
[INFO] [stdout]     |
[INFO] [stdout] 295 |     let first_operand_result = read_mem_as_u16_le(mem, (offset + 2));
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:296:57
[INFO] [stdout]     |
[INFO] [stdout] 296 |     let second_operand_result = read_mem_as_u16_le(mem, (offset + 3));
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:27:25
[INFO] [stdout]    |
[INFO] [stdout] 27 |                     let mut should_continue = true;
[INFO] [stdout]    |                         ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:626:25
[INFO] [stdout]     |
[INFO] [stdout] 626 |                     let mut f = File::create(dir.clone() + "registers.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:640:25
[INFO] [stdout]     |
[INFO] [stdout] 640 |                     let mut f = File::create(dir.clone() + "stack.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:654:25
[INFO] [stdout]     |
[INFO] [stdout] 654 |                     let mut f = File::create(dir.clone() + "program_counter.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:665:25
[INFO] [stdout]     |
[INFO] [stdout] 665 |                     let mut f = File::create(dir.clone() + "step_number.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:676:25
[INFO] [stdout]     |
[INFO] [stdout] 676 |                     let mut f = File::create(dir.clone() + "memory.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_invalid_number`
[INFO] [stdout]    --> src/opcode.rs:838:12
[INFO] [stdout]     |
[INFO] [stdout] 838 |     pub fn is_invalid_number(&self) -> bool
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.93s
[INFO] running `Command { std: "docker" "inspect" "51973682b1038fafce598c14048617f2303590c715eb0a9775ff4c17b5a24973", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51973682b1038fafce598c14048617f2303590c715eb0a9775ff4c17b5a24973", kill_on_drop: false }`
[INFO] [stdout] 51973682b1038fafce598c14048617f2303590c715eb0a9775ff4c17b5a24973
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9e8d72cb5d61f625ac0a55e191feb1d0e3b2a191fddef23663dd1a9ed1e2e64a
[INFO] running `Command { std: "docker" "start" "-a" "9e8d72cb5d61f625ac0a55e191feb1d0e3b2a191fddef23663dd1a9ed1e2e64a", kill_on_drop: false }`
[INFO] [stderr]    Compiling synacor_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:231:51
[INFO] [stdout]     |
[INFO] [stdout] 231 |     let register_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:232:48
[INFO] [stdout]     |
[INFO] [stdout] 232 |     let value_result = read_mem_as_u16_le(mem, (offset + 2));
[INFO] [stdout]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:256:48
[INFO] [stdout]     |
[INFO] [stdout] 256 |     let value_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stdout]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:275:48
[INFO] [stdout]     |
[INFO] [stdout] 275 |     let value_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stdout]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:294:47
[INFO] [stdout]     |
[INFO] [stdout] 294 |     let cell_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stdout]     |                                               ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:295:56
[INFO] [stdout]     |
[INFO] [stdout] 295 |     let first_operand_result = read_mem_as_u16_le(mem, (offset + 2));
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/opcode.rs:296:57
[INFO] [stdout]     |
[INFO] [stdout] 296 |     let second_operand_result = read_mem_as_u16_le(mem, (offset + 3));
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:27:25
[INFO] [stdout]    |
[INFO] [stdout] 27 |                     let mut should_continue = true;
[INFO] [stdout]    |                         ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:626:25
[INFO] [stdout]     |
[INFO] [stdout] 626 |                     let mut f = File::create(dir.clone() + "registers.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:640:25
[INFO] [stdout]     |
[INFO] [stdout] 640 |                     let mut f = File::create(dir.clone() + "stack.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:654:25
[INFO] [stdout]     |
[INFO] [stdout] 654 |                     let mut f = File::create(dir.clone() + "program_counter.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:665:25
[INFO] [stdout]     |
[INFO] [stdout] 665 |                     let mut f = File::create(dir.clone() + "step_number.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/vm.rs:676:25
[INFO] [stdout]     |
[INFO] [stdout] 676 |                     let mut f = File::create(dir.clone() + "memory.txt");
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_invalid_number`
[INFO] [stdout]    --> src/opcode.rs:838:12
[INFO] [stdout]     |
[INFO] [stdout] 838 |     pub fn is_invalid_number(&self) -> bool
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "9e8d72cb5d61f625ac0a55e191feb1d0e3b2a191fddef23663dd1a9ed1e2e64a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e8d72cb5d61f625ac0a55e191feb1d0e3b2a191fddef23663dd1a9ed1e2e64a", kill_on_drop: false }`
[INFO] [stdout] 9e8d72cb5d61f625ac0a55e191feb1d0e3b2a191fddef23663dd1a9ed1e2e64a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6ac0d9967b778615e14044170dd99561aa972558db6d9e5a4ae9f7fa33a22292
[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" "6ac0d9967b778615e14044170dd99561aa972558db6d9e5a4ae9f7fa33a22292", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/opcode.rs:231:51
[INFO] [stderr]     |
[INFO] [stderr] 231 |     let register_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/opcode.rs:232:48
[INFO] [stderr]     |
[INFO] [stderr] 232 |     let value_result = read_mem_as_u16_le(mem, (offset + 2));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/opcode.rs:256:48
[INFO] [stderr]     |
[INFO] [stderr] 256 |     let value_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/opcode.rs:275:48
[INFO] [stderr]     |
[INFO] [stderr] 275 |     let value_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/opcode.rs:294:47
[INFO] [stderr]     |
[INFO] [stderr] 294 |     let cell_result = read_mem_as_u16_le(mem, (offset + 1));
[INFO] [stderr]     |                                               ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/opcode.rs:295:56
[INFO] [stderr]     |
[INFO] [stderr] 295 |     let first_operand_result = read_mem_as_u16_le(mem, (offset + 2));
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/opcode.rs:296:57
[INFO] [stderr]     |
[INFO] [stderr] 296 |     let second_operand_result = read_mem_as_u16_le(mem, (offset + 3));
[INFO] [stderr]     |                                                         ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:27:25
[INFO] [stderr]    |
[INFO] [stderr] 27 |                     let mut should_continue = true;
[INFO] [stderr]    |                         ----^^^^^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/vm.rs:626:25
[INFO] [stderr]     |
[INFO] [stderr] 626 |                     let mut f = File::create(dir.clone() + "registers.txt");
[INFO] [stderr]     |                         ----^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/vm.rs:640:25
[INFO] [stderr]     |
[INFO] [stderr] 640 |                     let mut f = File::create(dir.clone() + "stack.txt");
[INFO] [stderr]     |                         ----^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/vm.rs:654:25
[INFO] [stderr]     |
[INFO] [stderr] 654 |                     let mut f = File::create(dir.clone() + "program_counter.txt");
[INFO] [stderr]     |                         ----^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/vm.rs:665:25
[INFO] [stderr]     |
[INFO] [stderr] 665 |                     let mut f = File::create(dir.clone() + "step_number.txt");
[INFO] [stderr]     |                         ----^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/vm.rs:676:25
[INFO] [stderr]     |
[INFO] [stderr] 676 |                     let mut f = File::create(dir.clone() + "memory.txt");
[INFO] [stderr]     |                         ----^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_invalid_number`
[INFO] [stderr]    --> src/opcode.rs:838:12
[INFO] [stderr]     |
[INFO] [stderr] 838 |     pub fn is_invalid_number(&self) -> bool
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 14 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/synacor_challenge-f0242e921102ab5d
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6ac0d9967b778615e14044170dd99561aa972558db6d9e5a4ae9f7fa33a22292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ac0d9967b778615e14044170dd99561aa972558db6d9e5a4ae9f7fa33a22292", kill_on_drop: false }`
[INFO] [stdout] 6ac0d9967b778615e14044170dd99561aa972558db6d9e5a4ae9f7fa33a22292
