[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 beta-2020-10-09 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 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/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" "+beta-2020-10-09" "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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f650039adbc5c5d43ec122291776ce68e84a776f2474b2aa4ebf4a784df42726
[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" "f650039adbc5c5d43ec122291776ce68e84a776f2474b2aa4ebf4a784df42726", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f650039adbc5c5d43ec122291776ce68e84a776f2474b2aa4ebf4a784df42726", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f650039adbc5c5d43ec122291776ce68e84a776f2474b2aa4ebf4a784df42726", kill_on_drop: false }`
[INFO] [stdout] f650039adbc5c5d43ec122291776ce68e84a776f2474b2aa4ebf4a784df42726
[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" "+beta-2020-10-09" "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] 9d735d0ea575ae25fcd1f0564ab445b1fed8e835fe68130f06fe45ded0047a5e
[INFO] running `Command { std: "docker" "start" "-a" "9d735d0ea575ae25fcd1f0564ab445b1fed8e835fe68130f06fe45ded0047a5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.0
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling time v0.1.39
[INFO] [stderr]    Compiling num-integer v0.1.36
[INFO] [stderr]    Compiling num-iter v0.1.35
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling chrono v0.4.0
[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 8.77s
[INFO] running `Command { std: "docker" "inspect" "9d735d0ea575ae25fcd1f0564ab445b1fed8e835fe68130f06fe45ded0047a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d735d0ea575ae25fcd1f0564ab445b1fed8e835fe68130f06fe45ded0047a5e", kill_on_drop: false }`
[INFO] [stdout] 9d735d0ea575ae25fcd1f0564ab445b1fed8e835fe68130f06fe45ded0047a5e
[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" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64bd8dc2a9b63717b8ba7b2199f57b1781891dc7e6cf5446867575e452d5dfa8
[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" "64bd8dc2a9b63717b8ba7b2199f57b1781891dc7e6cf5446867575e452d5dfa8", 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" "64bd8dc2a9b63717b8ba7b2199f57b1781891dc7e6cf5446867575e452d5dfa8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64bd8dc2a9b63717b8ba7b2199f57b1781891dc7e6cf5446867575e452d5dfa8", kill_on_drop: false }`
[INFO] [stdout] 64bd8dc2a9b63717b8ba7b2199f57b1781891dc7e6cf5446867575e452d5dfa8
[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" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3f838aff0972f860433a5883d954a8c21d292fb9f3b1d386f6a5d65c7ae03236
[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" "3f838aff0972f860433a5883d954a8c21d292fb9f3b1d386f6a5d65c7ae03236", 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 0.11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/synacor_challenge-474fabd9702a67a7
[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" "3f838aff0972f860433a5883d954a8c21d292fb9f3b1d386f6a5d65c7ae03236", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f838aff0972f860433a5883d954a8c21d292fb9f3b1d386f6a5d65c7ae03236", kill_on_drop: false }`
[INFO] [stdout] 3f838aff0972f860433a5883d954a8c21d292fb9f3b1d386f6a5d65c7ae03236
