[INFO] cloning repository https://github.com/danellis/webarc [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danellis/webarc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanellis%2Fwebarc", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanellis%2Fwebarc'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] bd029ae5ecb66eeae1d3e6d4aaf5071d0bbb9d58 [INFO] checking danellis/webarc against master#d2eadb7a94ef8c9deb5137695df33cd1fc5aee92 for pr-137268 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanellis%2Fwebarc" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/danellis/webarc on toolchain d2eadb7a94ef8c9deb5137695df33cd1fc5aee92 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d2eadb7a94ef8c9deb5137695df33cd1fc5aee92" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/danellis/webarc [INFO] finished tweaking git repo https://github.com/danellis/webarc [INFO] tweaked toml for git repo https://github.com/danellis/webarc written to /workspace/builds/worker-6-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/danellis/webarc already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d2eadb7a94ef8c9deb5137695df33cd1fc5aee92" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+d2eadb7a94ef8c9deb5137695df33cd1fc5aee92" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0dbee3adeba647e7bca412dd28930f942be5dc36aee10760038fa091fbbb7e4c [INFO] running `Command { std: "docker" "start" "-a" "0dbee3adeba647e7bca412dd28930f942be5dc36aee10760038fa091fbbb7e4c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0dbee3adeba647e7bca412dd28930f942be5dc36aee10760038fa091fbbb7e4c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0dbee3adeba647e7bca412dd28930f942be5dc36aee10760038fa091fbbb7e4c", kill_on_drop: false }` [INFO] [stdout] 0dbee3adeba647e7bca412dd28930f942be5dc36aee10760038fa091fbbb7e4c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+d2eadb7a94ef8c9deb5137695df33cd1fc5aee92" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c88332c7a870c852d75d8528f487b9faed04d15327a8cf432579b35c6faf3b89 [INFO] running `Command { std: "docker" "start" "-a" "c88332c7a870c852d75d8528f487b9faed04d15327a8cf432579b35c6faf3b89", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] Checking webarc v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::ops::Shr` [INFO] [stdout] --> src/webarc/instructions.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::ops::Shr; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::ops::Shr` [INFO] [stdout] --> src/webarc/instructions.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::ops::Shr; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `memory` [INFO] [stdout] --> src/webarc/instructions.rs:28:46 [INFO] [stdout] | [INFO] [stdout] 28 | fn exec_branch(registers: &mut RegisterFile, memory: &mut Memory, instruction: u32) -> Action { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `address` [INFO] [stdout] --> src/webarc/instructions.rs:123:15 [INFO] [stdout] | [INFO] [stdout] 123 | fn format_alu(address: u32, cond: &str, instruction: u32) -> String { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `memory` [INFO] [stdout] --> src/webarc/instructions.rs:165:47 [INFO] [stdout] | [INFO] [stdout] 165 | fn exec_alu_add(registers: &mut RegisterFile, memory: &mut Memory, rd: u32, op1: u32, op2: u32) -> Action { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `rd` [INFO] [stdout] --> src/webarc/instructions.rs:170:78 [INFO] [stdout] | [INFO] [stdout] 170 | fn exec_alu_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, rd: u32, op1: u32, op2: u32) -> Action { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_rd` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `op1` [INFO] [stdout] --> src/webarc/instructions.rs:170:87 [INFO] [stdout] | [INFO] [stdout] 170 | fn exec_alu_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, rd: u32, op1: u32, op2: u32) -> Action { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_op1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `op2` [INFO] [stdout] --> src/webarc/instructions.rs:170:97 [INFO] [stdout] | [INFO] [stdout] 170 | fn exec_alu_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, rd: u32, op1: u32, op2: u32) -> Action { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_op2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `address` [INFO] [stdout] --> src/webarc/instructions.rs:229:19 [INFO] [stdout] | [INFO] [stdout] 229 | fn format_ldr_str(address: u32, cond: &str, instruction: u32) -> String { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `memory` [INFO] [stdout] --> src/webarc/instructions.rs:28:46 [INFO] [stdout] | [INFO] [stdout] 28 | fn exec_branch(registers: &mut RegisterFile, memory: &mut Memory, instruction: u32) -> Action { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `registers` [INFO] [stdout] --> src/webarc/instructions.rs:283:23 [INFO] [stdout] | [INFO] [stdout] 283 | fn exec_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, instruction: u32) -> Action { [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_registers` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `memory` [INFO] [stdout] --> src/webarc/instructions.rs:283:53 [INFO] [stdout] | [INFO] [stdout] 283 | fn exec_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, instruction: u32) -> Action { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `instruction` [INFO] [stdout] --> src/webarc/instructions.rs:283:74 [INFO] [stdout] | [INFO] [stdout] 283 | fn exec_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, instruction: u32) -> Action { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instruction` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `address` [INFO] [stdout] --> src/webarc/instructions.rs:287:25 [INFO] [stdout] | [INFO] [stdout] 287 | fn format_unimplemented(address: u32, cond: &str, instruction: u32) -> String { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `instruction` [INFO] [stdout] --> src/webarc/instructions.rs:287:51 [INFO] [stdout] | [INFO] [stdout] 287 | fn format_unimplemented(address: u32, cond: &str, instruction: u32) -> String { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instruction` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `UNDEFINED_INSTRUCTION_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:7:7 [INFO] [stdout] | [INFO] [stdout] 7 | const UNDEFINED_INSTRUCTION_VECTOR: u32 = 0x04; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `address` [INFO] [stdout] --> src/webarc/instructions.rs:123:15 [INFO] [stdout] | [INFO] [stdout] 123 | fn format_alu(address: u32, cond: &str, instruction: u32) -> String { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `SWI_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:8:7 [INFO] [stdout] | [INFO] [stdout] 8 | const SWI_VECTOR: u32 = 0x08; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `PREFETCH_ABORT_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:9:7 [INFO] [stdout] | [INFO] [stdout] 9 | const PREFETCH_ABORT_VECTOR: u32 = 0x0c; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `memory` [INFO] [stdout] --> src/webarc/instructions.rs:165:47 [INFO] [stdout] | [INFO] [stdout] 165 | fn exec_alu_add(registers: &mut RegisterFile, memory: &mut Memory, rd: u32, op1: u32, op2: u32) -> Action { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `DATA_ABORT_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:10:7 [INFO] [stdout] | [INFO] [stdout] 10 | const DATA_ABORT_VECTOR: u32 = 0x10; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `ADDRESS_EXCEPTION_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:11:7 [INFO] [stdout] | [INFO] [stdout] 11 | const ADDRESS_EXCEPTION_VECTOR: u32 = 0x14; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `rd` [INFO] [stdout] --> src/webarc/instructions.rs:170:78 [INFO] [stdout] | [INFO] [stdout] 170 | fn exec_alu_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, rd: u32, op1: u32, op2: u32) -> Action { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_rd` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `IRQ_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:12:7 [INFO] [stdout] | [INFO] [stdout] 12 | const IRQ_VECTOR: u32 = 0x18; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `FIRQ_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:13:7 [INFO] [stdout] | [INFO] [stdout] 13 | const FIRQ_VECTOR: u32 = 0x1c; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `op1` [INFO] [stdout] --> src/webarc/instructions.rs:170:87 [INFO] [stdout] | [INFO] [stdout] 170 | fn exec_alu_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, rd: u32, op1: u32, op2: u32) -> Action { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_op1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `op2` [INFO] [stdout] --> src/webarc/instructions.rs:170:97 [INFO] [stdout] | [INFO] [stdout] 170 | fn exec_alu_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, rd: u32, op1: u32, op2: u32) -> Action { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_op2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `address` [INFO] [stdout] --> src/webarc/instructions.rs:229:19 [INFO] [stdout] | [INFO] [stdout] 229 | fn format_ldr_str(address: u32, cond: &str, instruction: u32) -> String { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `registers` [INFO] [stdout] --> src/webarc/instructions.rs:283:23 [INFO] [stdout] | [INFO] [stdout] 283 | fn exec_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, instruction: u32) -> Action { [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_registers` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `memory` [INFO] [stdout] --> src/webarc/instructions.rs:283:53 [INFO] [stdout] | [INFO] [stdout] 283 | fn exec_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, instruction: u32) -> Action { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_memory` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `instruction` [INFO] [stdout] --> src/webarc/instructions.rs:283:74 [INFO] [stdout] | [INFO] [stdout] 283 | fn exec_unimplemented(registers: &mut RegisterFile, memory: &mut Memory, instruction: u32) -> Action { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instruction` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `address` [INFO] [stdout] --> src/webarc/instructions.rs:287:25 [INFO] [stdout] | [INFO] [stdout] 287 | fn format_unimplemented(address: u32, cond: &str, instruction: u32) -> String { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_address` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `instruction` [INFO] [stdout] --> src/webarc/instructions.rs:287:51 [INFO] [stdout] | [INFO] [stdout] 287 | fn format_unimplemented(address: u32, cond: &str, instruction: u32) -> String { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instruction` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `UNDEFINED_INSTRUCTION_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:7:7 [INFO] [stdout] | [INFO] [stdout] 7 | const UNDEFINED_INSTRUCTION_VECTOR: u32 = 0x04; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `SWI_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:8:7 [INFO] [stdout] | [INFO] [stdout] 8 | const SWI_VECTOR: u32 = 0x08; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `PREFETCH_ABORT_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:9:7 [INFO] [stdout] | [INFO] [stdout] 9 | const PREFETCH_ABORT_VECTOR: u32 = 0x0c; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `DATA_ABORT_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:10:7 [INFO] [stdout] | [INFO] [stdout] 10 | const DATA_ABORT_VECTOR: u32 = 0x10; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `ADDRESS_EXCEPTION_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:11:7 [INFO] [stdout] | [INFO] [stdout] 11 | const ADDRESS_EXCEPTION_VECTOR: u32 = 0x14; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `IRQ_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:12:7 [INFO] [stdout] | [INFO] [stdout] 12 | const IRQ_VECTOR: u32 = 0x18; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `FIRQ_VECTOR` is never used [INFO] [stdout] --> src/webarc/cpu.rs:13:7 [INFO] [stdout] | [INFO] [stdout] 13 | const FIRQ_VECTOR: u32 = 0x1c; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:16:5 [INFO] [stdout] | [INFO] [stdout] 16 | f.read(as_u8_slice(&mut rom)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 16 | let _ = f.read(as_u8_slice(&mut rom)); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:16:5 [INFO] [stdout] | [INFO] [stdout] 16 | f.read(as_u8_slice(&mut rom)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 16 | let _ = f.read(as_u8_slice(&mut rom)); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s [INFO] running `Command { std: "docker" "inspect" "c88332c7a870c852d75d8528f487b9faed04d15327a8cf432579b35c6faf3b89", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c88332c7a870c852d75d8528f487b9faed04d15327a8cf432579b35c6faf3b89", kill_on_drop: false }` [INFO] [stdout] c88332c7a870c852d75d8528f487b9faed04d15327a8cf432579b35c6faf3b89