[INFO] cloning repository https://github.com/BigTuna08/rustyIMGs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BigTuna08/rustyIMGs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBigTuna08%2FrustyIMGs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBigTuna08%2FrustyIMGs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d9e4e713cde687a1d90ff6f322c40e8745b68d37 [INFO] checking BigTuna08/rustyIMGs against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBigTuna08%2FrustyIMGs" "/workspace/builds/worker-2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/BigTuna08/rustyIMGs on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/BigTuna08/rustyIMGs [INFO] finished tweaking git repo https://github.com/BigTuna08/rustyIMGs [INFO] tweaked toml for git repo https://github.com/BigTuna08/rustyIMGs written to /workspace/builds/worker-2/source/Cargo.toml [INFO] crate git repo https://github.com/BigTuna08/rustyIMGs already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] d8825435bb09a4d481ff8bfe3d4974ee56490efd3ea61733a6b8452757a99d1b [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" "d8825435bb09a4d481ff8bfe3d4974ee56490efd3ea61733a6b8452757a99d1b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d8825435bb09a4d481ff8bfe3d4974ee56490efd3ea61733a6b8452757a99d1b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d8825435bb09a4d481ff8bfe3d4974ee56490efd3ea61733a6b8452757a99d1b", kill_on_drop: false }` [INFO] [stdout] d8825435bb09a4d481ff8bfe3d4974ee56490efd3ea61733a6b8452757a99d1b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 18a932f4fcdbe0e9d2fe772230b089c2b356f6770c4b251a379f0e29f0c06efb [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" "18a932f4fcdbe0e9d2fe772230b089c2b356f6770c4b251a379f0e29f0c06efb", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Checking cfg-if v0.1.2 [INFO] [stderr] Checking libc v0.2.36 [INFO] [stderr] Compiling rayon-core v1.4.0 [INFO] [stderr] Checking adler32 v1.0.2 [INFO] [stderr] Checking byteorder v1.2.1 [INFO] [stderr] Checking either v1.4.0 [INFO] [stderr] Checking lazy_static v1.0.0 [INFO] [stderr] Checking lzw v0.10.0 [INFO] [stderr] Checking color_quant v1.0.0 [INFO] [stderr] Checking scoped_threadpool v0.1.9 [INFO] [stderr] Checking num-integer v0.1.36 [INFO] [stderr] Checking num-traits v0.1.43 [INFO] [stderr] Checking crossbeam-utils v0.2.2 [INFO] [stderr] Checking enum_primitive v0.1.1 [INFO] [stderr] Checking inflate v0.3.4 [INFO] [stderr] Checking itertools v0.7.6 [INFO] [stderr] Checking num-iter v0.1.35 [INFO] [stderr] Checking num-rational v0.1.42 [INFO] [stderr] Checking gif v0.9.2 [INFO] [stderr] Checking crossbeam-epoch v0.3.0 [INFO] [stderr] Checking deflate v0.7.17 [INFO] [stderr] Checking rand v0.4.2 [INFO] [stderr] Checking num_cpus v1.8.0 [INFO] [stderr] Checking crossbeam-deque v0.2.0 [INFO] [stderr] Checking png v0.11.0 [INFO] [stderr] Checking rayon v1.0.0 [INFO] [stderr] Checking jpeg-decoder v0.1.14 [INFO] [stderr] Checking image v0.18.0 [INFO] [stderr] Checking rustyImages v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::io::Error` [INFO] [stdout] --> src/main.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | use std::io::Error; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::path::Path` [INFO] [stdout] --> src/main.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | use std::path::Path; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> src/main.rs:75:36 [INFO] [stdout] | [INFO] [stdout] 75 | Some(mut genotype) => {{simple_point_mut(&mut genotype)} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_braces)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:158:49 [INFO] [stdout] | [INFO] [stdout] 158 | pub fn make_gray_pics(geno_len: usize, gp_map: &Fn(&Vec, u32, u32)->u8, width: u32, height: u32, count: usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Vec, u32, u32)->u8` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:183:53 [INFO] [stdout] | [INFO] [stdout] 183 | pub fn make_a_gray_pic(genotype: &Vec, gp_map: &Fn(&Vec, u32, u32)->u8, width: u32, height: u32, file_num: usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Vec, u32, u32)->u8` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::Error` [INFO] [stdout] --> src/main.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | use std::io::Error; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::path::Path` [INFO] [stdout] --> src/main.rs:13:5 [INFO] [stdout] | [INFO] [stdout] 13 | use std::path::Path; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary braces around block return value [INFO] [stdout] --> src/main.rs:75:36 [INFO] [stdout] | [INFO] [stdout] 75 | Some(mut genotype) => {{simple_point_mut(&mut genotype)} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_braces)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:158:49 [INFO] [stdout] | [INFO] [stdout] 158 | pub fn make_gray_pics(geno_len: usize, gp_map: &Fn(&Vec, u32, u32)->u8, width: u32, height: u32, count: usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Vec, u32, u32)->u8` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/main.rs:183:53 [INFO] [stdout] | [INFO] [stdout] 183 | pub fn make_a_gray_pic(genotype: &Vec, gp_map: &Fn(&Vec, u32, u32)->u8, width: u32, height: u32, file_num: usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Vec, u32, u32)->u8` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:72:13 [INFO] [stdout] | [INFO] [stdout] 72 | let mut genotype = test_get_geno(*current_pic_num); [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/main.rs:92:9 [INFO] [stdout] | [INFO] [stdout] 92 | let mut test_file = File::open("./imgs/genos.txt").unwrap(); [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/main.rs:112:9 [INFO] [stdout] | [INFO] [stdout] 112 | let mut l: Vec = vec![234, 66, 90, 56]; [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/main.rs:118:9 [INFO] [stdout] | [INFO] [stdout] 118 | let mut l_str: Vec = l.iter().map(|x| x.to_string()).collect(); [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/main.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 130 | let mut string_vec: Vec = genotype.iter().map(|x| x.to_string()).collect(); [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/main.rs:270:24 [INFO] [stdout] | [INFO] [stdout] 270 | 7 => { let mut v = -(source1_val-300.0).powf(2.0); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `rustyImages` should have a snake case name [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] = help: convert the identifier to snake case: `rusty_images` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:72:13 [INFO] [stdout] | [INFO] [stdout] 72 | let mut genotype = test_get_geno(*current_pic_num); [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/main.rs:92:9 [INFO] [stdout] | [INFO] [stdout] 92 | let mut test_file = File::open("./imgs/genos.txt").unwrap(); [INFO] [stdout] | ----^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:124:5 [INFO] [stdout] | [INFO] [stdout] 124 | test_file.write(l_str.as_bytes()); [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] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:133:5 [INFO] [stdout] | [INFO] [stdout] 133 | f.write(string_vec.as_bytes()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: literal out of range for `u8` [INFO] [stdout] --> src/main.rs:138:31 [INFO] [stdout] | [INFO] [stdout] 138 | let l2: Vec = vec![4, 696, 990, 806]; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[deny(overflowing_literals)]` on by default [INFO] [stdout] = note: the literal `696` does not fit into the type `u8` whose range is `0..=255` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: literal out of range for `u8` [INFO] [stdout] --> src/main.rs:138:36 [INFO] [stdout] | [INFO] [stdout] 138 | let l2: Vec = vec![4, 696, 990, 806]; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: the literal `990` does not fit into the type `u8` whose range is `0..=255` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: literal out of range for `u8` [INFO] [stdout] --> src/main.rs:138:41 [INFO] [stdout] | [INFO] [stdout] 138 | let l2: Vec = vec![4, 696, 990, 806]; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: the literal `806` does not fit into the type `u8` whose range is `0..=255` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:153:5 [INFO] [stdout] | [INFO] [stdout] 153 | test_file.read_to_end(&mut l); [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 does not need to be mutable [INFO] [stdout] --> src/main.rs:112:9 [INFO] [stdout] | [INFO] [stdout] 112 | let mut l: Vec = vec![234, 66, 90, 56]; [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/main.rs:118:9 [INFO] [stdout] | [INFO] [stdout] 118 | let mut l_str: Vec = l.iter().map(|x| x.to_string()).collect(); [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/main.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 130 | let mut string_vec: Vec = genotype.iter().map(|x| x.to_string()).collect(); [INFO] [stdout] | ----^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 3 previous errors; 15 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `rustyImages` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:270:24 [INFO] [stdout] | [INFO] [stdout] 270 | 7 => { let mut v = -(source1_val-300.0).powf(2.0); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: crate `rustyImages` should have a snake case name [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` on by default [INFO] [stdout] = help: convert the identifier to snake case: `rusty_images` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:124:5 [INFO] [stdout] | [INFO] [stdout] 124 | test_file.write(l_str.as_bytes()); [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] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:133:5 [INFO] [stdout] | [INFO] [stdout] 133 | f.write(string_vec.as_bytes()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: literal out of range for `u8` [INFO] [stdout] --> src/main.rs:138:31 [INFO] [stdout] | [INFO] [stdout] 138 | let l2: Vec = vec![4, 696, 990, 806]; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[deny(overflowing_literals)]` on by default [INFO] [stdout] = note: the literal `696` does not fit into the type `u8` whose range is `0..=255` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: literal out of range for `u8` [INFO] [stdout] --> src/main.rs:138:36 [INFO] [stdout] | [INFO] [stdout] 138 | let l2: Vec = vec![4, 696, 990, 806]; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: the literal `990` does not fit into the type `u8` whose range is `0..=255` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: literal out of range for `u8` [INFO] [stdout] --> src/main.rs:138:41 [INFO] [stdout] | [INFO] [stdout] 138 | let l2: Vec = vec![4, 696, 990, 806]; [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: the literal `806` does not fit into the type `u8` whose range is `0..=255` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:153:5 [INFO] [stdout] | [INFO] [stdout] 153 | test_file.read_to_end(&mut l); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 3 previous errors; 15 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "18a932f4fcdbe0e9d2fe772230b089c2b356f6770c4b251a379f0e29f0c06efb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "18a932f4fcdbe0e9d2fe772230b089c2b356f6770c4b251a379f0e29f0c06efb", kill_on_drop: false }` [INFO] [stdout] 18a932f4fcdbe0e9d2fe772230b089c2b356f6770c4b251a379f0e29f0c06efb