[INFO] cloning repository https://github.com/DangerFunPants/risc-v-emulator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DangerFunPants/risc-v-emulator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDangerFunPants%2Frisc-v-emulator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDangerFunPants%2Frisc-v-emulator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f4d027729768e24e3b1e1c5d6571d5f95f05e321
[INFO] checking DangerFunPants/risc-v-emulator against beta-2020-07-24 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDangerFunPants%2Frisc-v-emulator" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DangerFunPants/risc-v-emulator on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DangerFunPants/risc-v-emulator
[INFO] finished tweaking git repo https://github.com/DangerFunPants/risc-v-emulator
[INFO] tweaked toml for git repo https://github.com/DangerFunPants/risc-v-emulator written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/DangerFunPants/risc-v-emulator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb37867a8ec13a0f0f0bc463091ba6372dae1c2f905fd62eb0b4990e5b06ea43
[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" "cb37867a8ec13a0f0f0bc463091ba6372dae1c2f905fd62eb0b4990e5b06ea43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb37867a8ec13a0f0f0bc463091ba6372dae1c2f905fd62eb0b4990e5b06ea43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb37867a8ec13a0f0f0bc463091ba6372dae1c2f905fd62eb0b4990e5b06ea43", kill_on_drop: false }`
[INFO] [stdout] cb37867a8ec13a0f0f0bc463091ba6372dae1c2f905fd62eb0b4990e5b06ea43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91ac611692d17ed7690122ad7ec27aa02e3c264a154b42486bb583eb75a68b0a
[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" "91ac611692d17ed7690122ad7ec27aa02e3c264a154b42486bb583eb75a68b0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling nom v5.1.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling lexical-core v0.6.7
[INFO] [stderr]     Checking risc-v-emulator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::convert::Into`
[INFO] [stdout]  --> src/assembler.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::Into;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `take`
[INFO] [stdout]   --> src/assembler.rs:11:41
[INFO] [stdout]    |
[INFO] [stdout] 11 | use nom::bytes::complete::{take_while1, take, tag, tag_no_case, take_while};
[INFO] [stdout]    |                                         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::branch::alt`
[INFO] [stdout]   --> src/assembler.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use nom::branch::alt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::combinator::opt`
[INFO] [stdout]    --> src/assembler.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 337 |     use nom::combinator::opt;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `tag`, `take_while1`
[INFO] [stdout]    --> src/assembler.rs:338:32
[INFO] [stdout]     |
[INFO] [stdout] 338 |     use nom::bytes::complete::{tag, take_while1};
[INFO] [stdout]     |                                ^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `map_res`
[INFO] [stdout]    --> src/assembler.rs:339:27
[INFO] [stdout]     |
[INFO] [stdout] 339 |     use nom::combinator::{map_res};
[INFO] [stdout]     |                           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::IResult`
[INFO] [stdout]    --> src/assembler.rs:340:9
[INFO] [stdout]     |
[INFO] [stdout] 340 |     use nom::IResult;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]    --> src/assembler.rs:341:9
[INFO] [stdout]     |
[INFO] [stdout] 341 |     use std::str::FromStr;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::Into`
[INFO] [stdout]  --> src/assembler.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::Into;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `take`
[INFO] [stdout]   --> src/assembler.rs:11:41
[INFO] [stdout]    |
[INFO] [stdout] 11 | use nom::bytes::complete::{take_while1, take, tag, tag_no_case, take_while};
[INFO] [stdout]    |                                         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::branch::alt`
[INFO] [stdout]   --> src/assembler.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use nom::branch::alt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::combinator::opt`
[INFO] [stdout]    --> src/assembler.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 337 |     use nom::combinator::opt;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `tag`, `take_while1`
[INFO] [stdout]    --> src/assembler.rs:338:32
[INFO] [stdout]     |
[INFO] [stdout] 338 |     use nom::bytes::complete::{tag, take_while1};
[INFO] [stdout]     |                                ^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `map_res`
[INFO] [stdout]    --> src/assembler.rs:339:27
[INFO] [stdout]     |
[INFO] [stdout] 339 |     use nom::combinator::{map_res};
[INFO] [stdout]     |                           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::IResult`
[INFO] [stdout]    --> src/assembler.rs:340:9
[INFO] [stdout]     |
[INFO] [stdout] 340 |     use nom::IResult;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]    --> src/assembler.rs:341:9
[INFO] [stdout]     |
[INFO] [stdout] 341 |     use std::str::FromStr;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/assembler.rs:159:17
[INFO] [stdout]     |
[INFO] [stdout] 159 |     if let Some(m) = minus {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]    --> src/assembler.rs:159:17
[INFO] [stdout]     |
[INFO] [stdout] 159 |     if let Some(m) = minus {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `label_line`
[INFO] [stdout]    --> src/assembler.rs:281:4
[INFO] [stdout]     |
[INFO] [stdout] 281 | fn label_line(input: &str) -> IResult<&str, Instruction> {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `initialize_memory`
[INFO] [stdout]    --> src/main.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn initialize_memory(self: &mut Self, addr: u32, val: u32) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `initialize_register`
[INFO] [stdout]    --> src/main.rs:218:8
[INFO] [stdout]     |
[INFO] [stdout] 218 |     fn initialize_register(self: &mut Self, reg_num: u16, val: u32) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             writeln!(f, "0x{:x}: 0x{:x}", addr, instruction);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:153:17
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 writeln!(f, "x{:2}: 0x{:x}", reg_num, reg_result);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 |         self.fetch_stage();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:282:9
[INFO] [stdout]     |
[INFO] [stdout] 282 |         self.execute_stage();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:283:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |         self.mem_stage();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:389:9
[INFO] [stdout]     |
[INFO] [stdout] 389 |         self.register_file.set_a3(self.mw_register.rd_out as u16);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:419:9
[INFO] [stdout]     |
[INFO] [stdout] 419 |         self.register_file.set_a1(a1 as u16);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:420:9
[INFO] [stdout]     |
[INFO] [stdout] 420 |         self.register_file.set_a2(a2 as u16);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inB` should have a snake case name
[INFO] [stdout]    --> src/main.rs:426:13
[INFO] [stdout]     |
[INFO] [stdout] 426 |         let inB = get_bits(14, 12, instr);
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `in_b`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inC` should have a snake case name
[INFO] [stdout]    --> src/main.rs:427:13
[INFO] [stdout]     |
[INFO] [stdout] 427 |         let inC = get_bits(6, 0, instr);
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `in_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inA` should have a snake case name
[INFO] [stdout]    --> src/main.rs:735:31
[INFO] [stdout]     |
[INFO] [stdout] 735 | fn immed_gen(op_code: OpCode, inA: u32, inB: u32) -> i32 {
[INFO] [stdout]     |                               ^^^ help: convert the identifier to snake case: `in_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inB` should have a snake case name
[INFO] [stdout]    --> src/main.rs:735:41
[INFO] [stdout]     |
[INFO] [stdout] 735 | fn immed_gen(op_code: OpCode, inA: u32, inB: u32) -> i32 {
[INFO] [stdout]     |                                         ^^^ help: convert the identifier to snake case: `in_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:767:5
[INFO] [stdout]     |
[INFO] [stdout] 767 |     vm.execute_program();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/assembler.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 | /         match self {
[INFO] [stdout] 40 | |             Instruction::AddI(r1, r2, i) => write!(f, "addi {} {} {}", r1, r2, i),
[INFO] [stdout] 41 | |             Instruction::Lw(r1, r2, offset) => write!(f, "lw {} {} {}", r1, r2, offset),
[INFO] [stdout] 42 | |             Instruction::Beq(r1, r2, label) => write!(f, "beq {} {} {}", r1, r2, label),
[INFO] [stdout] ...  |
[INFO] [stdout] 52 | |             Instruction::LabelLine(label) => write!(f, "{}", label),
[INFO] [stdout] 53 | |         };
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/assembler.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |         write!(f, ".{}", self.0);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/assembler.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 151 |         write!(f, "x{}", self.0);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `label_line`
[INFO] [stdout]    --> src/assembler.rs:281:4
[INFO] [stdout]     |
[INFO] [stdout] 281 | fn label_line(input: &str) -> IResult<&str, Instruction> {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `initialize_memory`
[INFO] [stdout]    --> src/main.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn initialize_memory(self: &mut Self, addr: u32, val: u32) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `initialize_register`
[INFO] [stdout]    --> src/main.rs:218:8
[INFO] [stdout]     |
[INFO] [stdout] 218 |     fn initialize_register(self: &mut Self, reg_num: u16, val: u32) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/main.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             writeln!(f, "0x{:x}: 0x{:x}", addr, instruction);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:153:17
[INFO] [stdout]     |
[INFO] [stdout] 153 |                 writeln!(f, "x{:2}: 0x{:x}", reg_num, reg_result);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:280:9
[INFO] [stdout]     |
[INFO] [stdout] 280 |         self.fetch_stage();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:282:9
[INFO] [stdout]     |
[INFO] [stdout] 282 |         self.execute_stage();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:283:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |         self.mem_stage();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:389:9
[INFO] [stdout]     |
[INFO] [stdout] 389 |         self.register_file.set_a3(self.mw_register.rd_out as u16);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:419:9
[INFO] [stdout]     |
[INFO] [stdout] 419 |         self.register_file.set_a1(a1 as u16);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:420:9
[INFO] [stdout]     |
[INFO] [stdout] 420 |         self.register_file.set_a2(a2 as u16);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inB` should have a snake case name
[INFO] [stdout]    --> src/main.rs:426:13
[INFO] [stdout]     |
[INFO] [stdout] 426 |         let inB = get_bits(14, 12, instr);
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `in_b`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inC` should have a snake case name
[INFO] [stdout]    --> src/main.rs:427:13
[INFO] [stdout]     |
[INFO] [stdout] 427 |         let inC = get_bits(6, 0, instr);
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `in_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inA` should have a snake case name
[INFO] [stdout]    --> src/main.rs:735:31
[INFO] [stdout]     |
[INFO] [stdout] 735 | fn immed_gen(op_code: OpCode, inA: u32, inB: u32) -> i32 {
[INFO] [stdout]     |                               ^^^ help: convert the identifier to snake case: `in_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inB` should have a snake case name
[INFO] [stdout]    --> src/main.rs:735:41
[INFO] [stdout]     |
[INFO] [stdout] 735 | fn immed_gen(op_code: OpCode, inA: u32, inB: u32) -> i32 {
[INFO] [stdout]     |                                         ^^^ help: convert the identifier to snake case: `in_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/main.rs:767:5
[INFO] [stdout]     |
[INFO] [stdout] 767 |     vm.execute_program();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/assembler.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 | /         match self {
[INFO] [stdout] 40 | |             Instruction::AddI(r1, r2, i) => write!(f, "addi {} {} {}", r1, r2, i),
[INFO] [stdout] 41 | |             Instruction::Lw(r1, r2, offset) => write!(f, "lw {} {} {}", r1, r2, offset),
[INFO] [stdout] 42 | |             Instruction::Beq(r1, r2, label) => write!(f, "beq {} {} {}", r1, r2, label),
[INFO] [stdout] ...  |
[INFO] [stdout] 52 | |             Instruction::LabelLine(label) => write!(f, "{}", label),
[INFO] [stdout] 53 | |         };
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/assembler.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |         write!(f, ".{}", self.0);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/assembler.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 151 |         write!(f, "x{}", self.0);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 28 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.89s
[INFO] running `Command { std: "docker" "inspect" "91ac611692d17ed7690122ad7ec27aa02e3c264a154b42486bb583eb75a68b0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91ac611692d17ed7690122ad7ec27aa02e3c264a154b42486bb583eb75a68b0a", kill_on_drop: false }`
[INFO] [stdout] 91ac611692d17ed7690122ad7ec27aa02e3c264a154b42486bb583eb75a68b0a
