[INFO] cloning repository https://github.com/abigailsdev/quarc [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/abigailsdev/quarc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabigailsdev%2Fquarc", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabigailsdev%2Fquarc'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 649116f73951da6c3ebcf6dd358198c4bcad9727 [INFO] checking abigailsdev/quarc/649116f73951da6c3ebcf6dd358198c4bcad9727 against master#f2abf827c128120ed7a874d02973947968c158b8 for pr-132268 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabigailsdev%2Fquarc" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/abigailsdev/quarc on toolchain f2abf827c128120ed7a874d02973947968c158b8 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f2abf827c128120ed7a874d02973947968c158b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/abigailsdev/quarc [INFO] finished tweaking git repo https://github.com/abigailsdev/quarc [INFO] tweaked toml for git repo https://github.com/abigailsdev/quarc written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/abigailsdev/quarc 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" "+f2abf827c128120ed7a874d02973947968c158b8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded warc v0.3.2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+f2abf827c128120ed7a874d02973947968c158b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2375af92eac3e2fef7bd2d183a1034f9b3142dd7511cded27a804d0186fcd80e [INFO] running `Command { std: "docker" "start" "-a" "2375af92eac3e2fef7bd2d183a1034f9b3142dd7511cded27a804d0186fcd80e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2375af92eac3e2fef7bd2d183a1034f9b3142dd7511cded27a804d0186fcd80e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2375af92eac3e2fef7bd2d183a1034f9b3142dd7511cded27a804d0186fcd80e", kill_on_drop: false }` [INFO] [stdout] 2375af92eac3e2fef7bd2d183a1034f9b3142dd7511cded27a804d0186fcd80e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+f2abf827c128120ed7a874d02973947968c158b8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f647785f8ddbf3841de51182f5eeced17f60807c3b09ccf844e6ce8797149891 [INFO] running `Command { std: "docker" "start" "-a" "f647785f8ddbf3841de51182f5eeced17f60807c3b09ccf844e6ce8797149891", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.1.0 [INFO] [stderr] Compiling libc v0.2.153 [INFO] [stderr] Compiling proc-macro2 v1.0.78 [INFO] [stderr] Compiling rand_core v0.4.2 [INFO] [stderr] Compiling unicode-ident v1.0.12 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling siphasher v0.2.3 [INFO] [stderr] Compiling serde v1.0.197 [INFO] [stderr] Checking memchr v2.7.1 [INFO] [stderr] Compiling pkg-config v0.3.30 [INFO] [stderr] Checking once_cell v1.19.0 [INFO] [stderr] Compiling cc v1.0.89 [INFO] [stderr] Compiling vcpkg v0.2.15 [INFO] [stderr] Checking pin-project-lite v0.2.13 [INFO] [stderr] Checking bytes v1.5.0 [INFO] [stderr] Compiling string_cache_shared v0.3.0 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Checking itoa v1.0.10 [INFO] [stderr] Checking futures-core v0.3.30 [INFO] [stderr] Compiling serde_json v1.0.114 [INFO] [stderr] Compiling rand_core v0.3.1 [INFO] [stderr] Compiling rand_jitter v0.1.4 [INFO] [stderr] Compiling autocfg v0.1.8 [INFO] [stderr] Compiling phf_shared v0.7.24 [INFO] [stderr] Compiling rand_hc v0.1.0 [INFO] [stderr] Compiling rand_isaac v0.1.1 [INFO] [stderr] Compiling rand_xorshift v0.1.1 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Checking tracing-core v0.1.32 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Checking foreign-types-shared v0.1.1 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Compiling slab v0.4.9 [INFO] [stderr] Checking new_debug_unreachable v1.0.4 [INFO] [stderr] Compiling ryu v1.0.17 [INFO] [stderr] Checking log v0.4.21 [INFO] [stderr] Checking fnv v1.0.7 [INFO] [stderr] Compiling openssl v0.10.64 [INFO] [stderr] Checking tinyvec_macros v0.1.1 [INFO] [stderr] Checking tracing v0.1.40 [INFO] [stderr] Checking http v0.2.12 [INFO] [stderr] Checking tinyvec v1.6.0 [INFO] [stderr] Checking foreign-types v0.3.2 [INFO] [stderr] Compiling httparse v1.8.0 [INFO] [stderr] Checking equivalent v1.0.1 [INFO] [stderr] Compiling quote v1.0.35 [INFO] [stderr] Checking hashbrown v0.14.3 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Checking percent-encoding v2.3.1 [INFO] [stderr] Checking futures-io v0.3.30 [INFO] [stderr] Checking mac v0.1.1 [INFO] [stderr] Checking futures-task v0.3.30 [INFO] [stderr] Checking futures-sink v0.3.30 [INFO] [stderr] Compiling syn v2.0.52 [INFO] [stderr] Checking bitflags v2.4.2 [INFO] [stderr] Compiling rand_os v0.1.3 [INFO] [stderr] Checking num_cpus v1.16.0 [INFO] [stderr] Checking socket2 v0.5.6 [INFO] [stderr] Checking mio v0.8.11 [INFO] [stderr] Compiling native-tls v0.2.11 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Checking form_urlencoded v1.2.1 [INFO] [stderr] Checking futures-util v0.3.30 [INFO] [stderr] Checking futf v0.1.5 [INFO] [stderr] Compiling num-traits v0.2.18 [INFO] [stderr] Checking utf-8 v0.7.6 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Checking try-lock v0.2.5 [INFO] [stderr] Checking openssl-probe v0.1.5 [INFO] [stderr] Checking precomputed-hash v0.1.1 [INFO] [stderr] Compiling crc32fast v1.4.0 [INFO] [stderr] Compiling version_check v0.9.4 [INFO] [stderr] Checking unicode-bidi v0.3.15 [INFO] [stderr] Compiling lexical-core v0.7.6 [INFO] [stderr] Checking want v0.3.1 [INFO] [stderr] Compiling openssl-sys v0.9.101 [INFO] [stderr] Checking indexmap v2.2.5 [INFO] [stderr] Checking tokio v1.36.0 [INFO] [stderr] Checking http-body v0.4.6 [INFO] [stderr] Checking unicode-normalization v0.1.23 [INFO] [stderr] Checking tendril v0.4.3 [INFO] [stderr] Checking phf v0.7.24 [INFO] [stderr] Compiling nom v5.1.3 [INFO] [stderr] Checking aho-corasick v1.1.2 [INFO] [stderr] Checking futures-channel v0.3.30 [INFO] [stderr] Checking bitflags v1.3.2 [INFO] [stderr] Checking regex-syntax v0.8.2 [INFO] [stderr] Checking tower-service v0.3.2 [INFO] [stderr] Checking rle-decode-fast v1.0.3 [INFO] [stderr] Checking arrayvec v0.5.2 [INFO] [stderr] Checking static_assertions v1.1.0 [INFO] [stderr] Checking httpdate v1.0.3 [INFO] [stderr] Checking libflate_lz77 v1.2.0 [INFO] [stderr] Checking idna v0.5.0 [INFO] [stderr] Compiling phf_generator v0.7.24 [INFO] [stderr] Checking getrandom v0.2.12 [INFO] [stderr] Compiling string_cache_codegen v0.4.4 [INFO] [stderr] Compiling phf_codegen v0.7.24 [INFO] [stderr] Checking adler32 v1.2.0 [INFO] [stderr] Checking base64 v0.21.7 [INFO] [stderr] Checking iana-time-zone v0.1.60 [INFO] [stderr] Checking libflate v1.4.0 [INFO] [stderr] Checking uuid v0.8.2 [INFO] [stderr] Checking rustls-pemfile v1.0.4 [INFO] [stderr] Checking url v2.5.0 [INFO] [stderr] Checking encoding_rs v0.8.33 [INFO] [stderr] Checking ipnet v2.9.0 [INFO] [stderr] Compiling string_cache v0.7.5 [INFO] [stderr] Checking sync_wrapper v0.1.2 [INFO] [stderr] Checking mime v0.3.17 [INFO] [stderr] Checking chrono v0.4.34 [INFO] [stderr] Checking serde_urlencoded v0.7.1 [INFO] [stderr] Checking regex-automata v0.4.6 [INFO] [stderr] Compiling serde_derive v1.0.197 [INFO] [stderr] Compiling openssl-macros v0.1.1 [INFO] [stderr] Checking warc v0.3.2 [INFO] [stderr] Checking tokio-util v0.7.10 [INFO] [stderr] Compiling html5ever v0.22.5 [INFO] [stderr] Checking h2 v0.3.24 [INFO] [stderr] Checking regex v1.10.3 [INFO] [stderr] Compiling markup5ever v0.7.5 [INFO] [stderr] Checking tokio-native-tls v0.3.1 [INFO] [stderr] Checking hyper v0.14.28 [INFO] [stderr] Checking soup v0.5.1 [INFO] [stderr] Checking hyper-tls v0.5.0 [INFO] [stderr] Checking reqwest v0.11.24 [INFO] [stderr] Checking quarc v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:134:9 [INFO] [stdout] | [INFO] [stdout] 134 | let mut warc = WarcWriter::from_path("output.warc"); [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:134:9 [INFO] [stdout] | [INFO] [stdout] 134 | let mut warc = WarcWriter::from_path("output.warc"); [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: struct `Nothing` is never constructed [INFO] [stdout] --> src/main.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | struct Nothing; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Nothing` is never constructed [INFO] [stdout] --> src/main.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | struct Nothing; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 53 | warc_head.set_header(WarcHeader::TargetURI, args[1].to_string()); [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] 53 | let _ = warc_head.set_header(WarcHeader::TargetURI, args[1].to_string()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 53 | warc_head.set_header(WarcHeader::TargetURI, args[1].to_string()); [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] 53 | let _ = warc_head.set_header(WarcHeader::TargetURI, args[1].to_string()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:56:9 [INFO] [stdout] | [INFO] [stdout] 56 | warc_head.set_header(WarcHeader::ContentType, mime.unwrap()); [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] 56 | let _ = warc_head.set_header(WarcHeader::ContentType, mime.unwrap()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:56:9 [INFO] [stdout] | [INFO] [stdout] 56 | warc_head.set_header(WarcHeader::ContentType, mime.unwrap()); [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] 56 | let _ = warc_head.set_header(WarcHeader::ContentType, mime.unwrap()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:100:9 [INFO] [stdout] | [INFO] [stdout] 100 | dep_warc_head.set_header(WarcHeader::TargetURI, url.to_string()); [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] 100 | let _ = dep_warc_head.set_header(WarcHeader::TargetURI, url.to_string()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:103:13 [INFO] [stdout] | [INFO] [stdout] 103 | dep_warc_head.set_header(WarcHeader::ContentType, dep_mime.clone().unwrap()); [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] 103 | let _ = dep_warc_head.set_header(WarcHeader::ContentType, dep_mime.clone().unwrap()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:100:9 [INFO] [stdout] | [INFO] [stdout] 100 | dep_warc_head.set_header(WarcHeader::TargetURI, url.to_string()); [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] 100 | let _ = dep_warc_head.set_header(WarcHeader::TargetURI, url.to_string()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:138:9 [INFO] [stdout] | [INFO] [stdout] 138 | nwarc.write(&record); [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] 138 | let _ = nwarc.write(&record); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:103:13 [INFO] [stdout] | [INFO] [stdout] 103 | dep_warc_head.set_header(WarcHeader::ContentType, dep_mime.clone().unwrap()); [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] 103 | let _ = dep_warc_head.set_header(WarcHeader::ContentType, dep_mime.clone().unwrap()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:140:13 [INFO] [stdout] | [INFO] [stdout] 140 | nwarc.write(&rec); [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] 140 | let _ = nwarc.write(&rec); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:138:9 [INFO] [stdout] | [INFO] [stdout] 138 | nwarc.write(&record); [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] 138 | let _ = nwarc.write(&record); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:140:13 [INFO] [stdout] | [INFO] [stdout] 140 | nwarc.write(&rec); [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] 140 | let _ = nwarc.write(&rec); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.96s [INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: html5ever v0.22.5 [INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1` [INFO] running `Command { std: "docker" "inspect" "f647785f8ddbf3841de51182f5eeced17f60807c3b09ccf844e6ce8797149891", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f647785f8ddbf3841de51182f5eeced17f60807c3b09ccf844e6ce8797149891", kill_on_drop: false }` [INFO] [stdout] f647785f8ddbf3841de51182f5eeced17f60807c3b09ccf844e6ce8797149891