[INFO] cloning repository https://github.com/JosueMixalis/scan-vpc [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JosueMixalis/scan-vpc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJosueMixalis%2Fscan-vpc", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJosueMixalis%2Fscan-vpc'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ee4aa50086a104d7e39573b8af31203716bec2dc [INFO] checking JosueMixalis/scan-vpc against 98fd715edd3a0a5aa8f2041d7e20a3143b0fc0d3 for pr-160235-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJosueMixalis%2Fscan-vpc" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/JosueMixalis/scan-vpc [INFO] finished tweaking git repo https://github.com/JosueMixalis/scan-vpc [INFO] tweaked toml for git repo https://github.com/JosueMixalis/scan-vpc written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/JosueMixalis/scan-vpc on toolchain 98fd715edd3a0a5aa8f2041d7e20a3143b0fc0d3 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+98fd715edd3a0a5aa8f2041d7e20a3143b0fc0d3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/JosueMixalis/scan-vpc 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" "+98fd715edd3a0a5aa8f2041d7e20a3143b0fc0d3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded doc-comment v0.3.3 [INFO] [stderr] Downloaded html_parser v0.7.0 [INFO] [stderr] Downloaded block-padding v0.3.3 [INFO] [stderr] Downloaded cbc v0.1.2 [INFO] [stderr] Downloaded fancy-regex v0.13.0 [INFO] [stderr] Downloaded cfb v0.9.0 [INFO] [stderr] Downloaded quick-xml v0.31.0 [INFO] [stderr] Downloaded chrono v0.4.41 [INFO] [stderr] Downloaded umya-spreadsheet v1.2.7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }` [INFO] [stdout] ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a [INFO] running `Command { std: "docker" "start" "ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a" "/opt/rustwide/cargo-home/bin/cargo" "+98fd715edd3a0a5aa8f2041d7e20a3143b0fc0d3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a" "/opt/rustwide/cargo-home/bin/cargo" "+98fd715edd3a0a5aa8f2041d7e20a3143b0fc0d3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] Checking cfg-if v1.0.1 [INFO] [stderr] Compiling crossbeam-utils v0.8.21 [INFO] [stderr] Compiling thiserror v2.0.12 [INFO] [stderr] Checking simd-adler32 v0.3.7 [INFO] [stderr] Checking memchr v2.7.5 [INFO] [stderr] Compiling syn v2.0.104 [INFO] [stderr] Compiling rayon-core v1.12.1 [INFO] [stderr] Checking crypto-common v0.1.6 [INFO] [stderr] Checking adler2 v2.0.1 [INFO] [stderr] Compiling libc v0.2.174 [INFO] [stderr] Checking crc32fast v1.4.2 [INFO] [stderr] Checking miniz_oxide v0.8.9 [INFO] [stderr] Compiling autocfg v1.5.0 [INFO] [stderr] Compiling ucd-trie v0.1.7 [INFO] [stderr] Compiling serde v1.0.219 [INFO] [stderr] Checking flate2 v1.1.2 [INFO] [stderr] Checking block-padding v0.3.3 [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling zerocopy v0.8.26 [INFO] [stderr] Checking subtle v2.6.1 [INFO] [stderr] Checking crossbeam-epoch v0.9.18 [INFO] [stderr] Checking either v1.15.0 [INFO] [stderr] Checking digest v0.10.7 [INFO] [stderr] Checking inout v0.1.4 [INFO] [stderr] Checking crossbeam-deque v0.8.6 [INFO] [stderr] Checking aho-corasick v1.1.3 [INFO] [stderr] Checking weezl v0.1.10 [INFO] [stderr] Checking byteorder v1.5.0 [INFO] [stderr] Compiling doc-comment v0.3.3 [INFO] [stderr] Compiling serde_json v1.0.140 [INFO] [stderr] Checking regex-syntax v0.8.5 [INFO] [stderr] Checking getrandom v0.3.3 [INFO] [stderr] Checking cipher v0.4.4 [INFO] [stderr] Checking zune-inflate v0.2.54 [INFO] [stderr] Checking fdeflate v0.3.7 [INFO] [stderr] Checking half v2.6.0 [INFO] [stderr] Checking rayon v1.10.0 [INFO] [stderr] Checking lebe v0.5.2 [INFO] [stderr] Checking bit_field v0.10.2 [INFO] [stderr] Checking color_quant v1.1.0 [INFO] [stderr] Checking smallvec v1.15.1 [INFO] [stderr] Checking bit-vec v0.6.3 [INFO] [stderr] Checking once_cell v1.21.3 [INFO] [stderr] Checking bytemuck v1.23.1 [INFO] [stderr] Checking png v0.17.16 [INFO] [stderr] Checking exr v1.73.0 [INFO] [stderr] Checking bit-set v0.5.3 [INFO] [stderr] Checking gif v0.13.3 [INFO] [stderr] Checking qoi v0.4.1 [INFO] [stderr] Checking uuid v1.17.0 [INFO] [stderr] Checking iana-time-zone v0.1.63 [INFO] [stderr] Checking chrono v0.4.41 [INFO] [stderr] Checking cfb v0.9.0 [INFO] [stderr] Checking sha2 v0.10.9 [INFO] [stderr] Checking regex-automata v0.4.9 [INFO] [stderr] Checking aes v0.8.4 [INFO] [stderr] Compiling thiserror-impl v2.0.12 [INFO] [stderr] Compiling serde_derive v1.0.219 [INFO] [stderr] Compiling thiserror-impl v1.0.69 [INFO] [stderr] Checking ahash v0.8.12 [INFO] [stderr] Checking hashbrown v0.14.5 [INFO] [stderr] Checking cbc v0.1.2 [INFO] [stderr] Checking zip v0.6.6 [INFO] [stderr] Checking jpeg-decoder v0.3.2 [INFO] [stderr] Checking getrandom v0.2.16 [INFO] [stderr] Checking md-5 v0.10.6 [INFO] [stderr] Checking hmac v0.12.1 [INFO] [stderr] Checking encoding_rs v0.8.35 [INFO] [stderr] Checking pest v2.8.1 [INFO] [stderr] Checking tiff v0.9.1 [INFO] [stderr] Checking lazy_static v1.5.0 [INFO] [stderr] Checking thousands v0.2.0 [INFO] [stderr] Checking thiserror v1.0.69 [INFO] [stderr] Checking image v0.24.9 [INFO] [stderr] Compiling pest_meta v2.8.1 [INFO] [stderr] Checking fancy-regex v0.13.0 [INFO] [stderr] Checking regex v1.11.1 [INFO] [stderr] Compiling pest_generator v2.8.1 [INFO] [stderr] Compiling pest_derive v2.8.1 [INFO] [stderr] Checking quick-xml v0.31.0 [INFO] [stderr] Checking html_parser v0.7.0 [INFO] [stderr] Checking umya-spreadsheet v1.2.7 [INFO] [stderr] Checking scan-red v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `str::FromStr` [INFO] [stdout] --> src/main.rs:1:41 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{io::{self,Write}, path::Path, str::FromStr}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Spreadsheet` [INFO] [stdout] --> src/main.rs:2:33 [INFO] [stdout] | [INFO] [stdout] 2 | use umya_spreadsheet::{new_file,Spreadsheet}; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `serde::Deserialize` [INFO] [stdout] --> src/funciones.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use serde::Deserialize; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `str::FromStr` [INFO] [stdout] --> src/main.rs:1:41 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{io::{self,Write}, path::Path, str::FromStr}; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fmt::format` [INFO] [stdout] --> src/funciones.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::fmt::format; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Write` and `self` [INFO] [stdout] --> src/funciones.rs:3:15 [INFO] [stdout] | [INFO] [stdout] 3 | use std::io::{self, Write}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Spreadsheet` [INFO] [stdout] --> src/main.rs:2:33 [INFO] [stdout] | [INFO] [stdout] 2 | use umya_spreadsheet::{new_file,Spreadsheet}; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `serde::Deserialize` [INFO] [stdout] --> src/funciones.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use serde::Deserialize; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fmt::format` [INFO] [stdout] --> src/funciones.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::fmt::format; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Write` and `self` [INFO] [stdout] --> src/funciones.rs:3:15 [INFO] [stdout] | [INFO] [stdout] 3 | use std::io::{self, Write}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `nombre_libro` [INFO] [stdout] --> src/main.rs:31:9 [INFO] [stdout] | [INFO] [stdout] 31 | let nombre_libro: String = format!("Servicios_red_{}_{}",proyecto_id,red_vpc); [INFO] [stdout] | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nombre_libro` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `nombre_libro` [INFO] [stdout] --> src/main.rs:31:9 [INFO] [stdout] | [INFO] [stdout] 31 | let nombre_libro: String = format!("Servicios_red_{}_{}",proyecto_id,red_vpc); [INFO] [stdout] | ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nombre_libro` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `network`, `subnetwork`, and `network_ip` are never read [INFO] [stdout] --> src/funciones.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 9 | struct NetworkInterface { [INFO] [stdout] | ---------------- fields in this struct [INFO] [stdout] 10 | network: Option, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 11 | subnetwork: Option, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 12 | network_ip: Option, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `NetworkInterface` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `network_interfaces` is never read [INFO] [stdout] --> src/funciones.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 17 | struct ComputeInstance { [INFO] [stdout] | --------------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 23 | network_interfaces: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `ComputeInstance` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Subnetwork` is never constructed [INFO] [stdout] --> src/funciones.rs:40:8 [INFO] [stdout] | [INFO] [stdout] 40 | struct Subnetwork { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `write_subnetwork_sheet` is never used [INFO] [stdout] --> src/funciones.rs:178:8 [INFO] [stdout] | [INFO] [stdout] 178 | pub fn write_subnetwork_sheet(book: &mut Spreadsheet, proyecto: String, vpc: &str) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `network`, `subnetwork`, and `network_ip` are never read [INFO] [stdout] --> src/funciones.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 9 | struct NetworkInterface { [INFO] [stdout] | ---------------- fields in this struct [INFO] [stdout] 10 | network: Option, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 11 | subnetwork: Option, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 12 | network_ip: Option, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `NetworkInterface` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `network_interfaces` is never read [INFO] [stdout] --> src/funciones.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 17 | struct ComputeInstance { [INFO] [stdout] | --------------- field in this struct [INFO] [stdout] ... [INFO] [stdout] 23 | network_interfaces: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `ComputeInstance` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Subnetwork` is never constructed [INFO] [stdout] --> src/funciones.rs:40:8 [INFO] [stdout] | [INFO] [stdout] 40 | struct Subnetwork { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `write_subnetwork_sheet` is never used [INFO] [stdout] --> src/funciones.rs:178:8 [INFO] [stdout] | [INFO] [stdout] 178 | pub fn write_subnetwork_sheet(book: &mut Spreadsheet, proyecto: String, vpc: &str) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/funciones.rs:120:5 [INFO] [stdout] | [INFO] [stdout] 120 | book.new_sheet(sheet_name); [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)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 120 | let _ = book.new_sheet(sheet_name); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/funciones.rs:120:5 [INFO] [stdout] | [INFO] [stdout] 120 | book.new_sheet(sheet_name); [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)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 120 | let _ = book.new_sheet(sheet_name); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/funciones.rs:159:5 [INFO] [stdout] | [INFO] [stdout] 159 | book.new_sheet(sheet_name); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 159 | let _ = book.new_sheet(sheet_name); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/funciones.rs:159:5 [INFO] [stdout] | [INFO] [stdout] 159 | book.new_sheet(sheet_name); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 159 | let _ = book.new_sheet(sheet_name); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/funciones.rs:193:5 [INFO] [stdout] | [INFO] [stdout] 193 | book.new_sheet(sheet_name); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 193 | let _ = book.new_sheet(sheet_name); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/funciones.rs:193:5 [INFO] [stdout] | [INFO] [stdout] 193 | book.new_sheet(sheet_name); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 193 | let _ = book.new_sheet(sheet_name); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.08s [INFO] running `Command { std: "docker" "inspect" "ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a", kill_on_drop: false }` [INFO] [stdout] ae47eb7f88bbed31fcb7912e818fd20140cf4e10a028343ace10701ebfb3848a