[INFO] fetching crate protobuf_message_factory 0.1.3...
[INFO] testing protobuf_message_factory-0.1.3 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate protobuf_message_factory 0.1.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate protobuf_message_factory 0.1.3
[INFO] finished tweaking crates.io crate protobuf_message_factory 0.1.3
[INFO] tweaked toml for crates.io crate protobuf_message_factory 0.1.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate protobuf_message_factory 0.1.3 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate protobuf_message_factory 0.1.3 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" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63f7dcfac8650b952b1cfec21328eb8e4993e8d9e11168ca306c8fee0627f580
[INFO] running `Command { std: "docker" "start" "-a" "63f7dcfac8650b952b1cfec21328eb8e4993e8d9e11168ca306c8fee0627f580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63f7dcfac8650b952b1cfec21328eb8e4993e8d9e11168ca306c8fee0627f580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63f7dcfac8650b952b1cfec21328eb8e4993e8d9e11168ca306c8fee0627f580", kill_on_drop: false }`
[INFO] [stdout] 63f7dcfac8650b952b1cfec21328eb8e4993e8d9e11168ca306c8fee0627f580
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fbd99aeeb1e9309200d2200205c0517c7191db1f231dae29fe6a59070d327cf9
[INFO] running `Command { std: "docker" "start" "-a" "fbd99aeeb1e9309200d2200205c0517c7191db1f231dae29fe6a59070d327cf9", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling protobuf_message_factory v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut contents = "use std::cell::RefCell;
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     mod_file.write(b"pub mod factory;\n");
[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] 93 |     let _ = mod_file.write(b"pub mod factory;\n");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     factory_file.write_all(&contents[..]);
[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] 95 |     let _ = factory_file.write_all(&contents[..]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     factory_file.write(b"\n\n");
[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] 96 |     let _ = factory_file.write(b"\n\n");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         factory_file.write_fmt(format_args!("use crate::{};\n", item.file_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] 99 |         let _ = factory_file.write_fmt(format_args!("use crate::{};\n", item.file_name));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         mod_file.write_fmt(format_args!("pub mod {};\n", item.file_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] 100 |         let _ = mod_file.write_fmt(format_args!("pub mod {};\n", item.file_name));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 103 |     factory_file.write(b"\nfn init_descriptors() {");
[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 _ = factory_file.write(b"\nfn init_descriptors() {");
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 | /             factory_file.write_fmt(format_args!(
[INFO] [stdout] 108 | |                 "\n    register_message::<{}::{}>();",
[INFO] [stdout] 109 | |                 file.file_name, msg
[INFO] [stdout] 110 | |             ));
[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] 107 |             let _ = factory_file.write_fmt(format_args!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 114 |     factory_file.write(b"\n}\n");
[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] 114 |     let _ = factory_file.write(b"\n}\n");
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.99s
[INFO] running `Command { std: "docker" "inspect" "fbd99aeeb1e9309200d2200205c0517c7191db1f231dae29fe6a59070d327cf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbd99aeeb1e9309200d2200205c0517c7191db1f231dae29fe6a59070d327cf9", kill_on_drop: false }`
[INFO] [stdout] fbd99aeeb1e9309200d2200205c0517c7191db1f231dae29fe6a59070d327cf9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d07c07ff6f0490409d189673a759833c0c85c4f7f85a7b6c8c99c2d2b2e9f048
[INFO] running `Command { std: "docker" "start" "-a" "d07c07ff6f0490409d189673a759833c0c85c4f7f85a7b6c8c99c2d2b2e9f048", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut contents = "use std::cell::RefCell;
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     mod_file.write(b"pub mod factory;\n");
[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] 93 |     let _ = mod_file.write(b"pub mod factory;\n");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     factory_file.write_all(&contents[..]);
[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] 95 |     let _ = factory_file.write_all(&contents[..]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     factory_file.write(b"\n\n");
[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] 96 |     let _ = factory_file.write(b"\n\n");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         factory_file.write_fmt(format_args!("use crate::{};\n", item.file_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] 99 |         let _ = factory_file.write_fmt(format_args!("use crate::{};\n", item.file_name));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         mod_file.write_fmt(format_args!("pub mod {};\n", item.file_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] 100 |         let _ = mod_file.write_fmt(format_args!("pub mod {};\n", item.file_name));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 103 |     factory_file.write(b"\nfn init_descriptors() {");
[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 _ = factory_file.write(b"\nfn init_descriptors() {");
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 | /             factory_file.write_fmt(format_args!(
[INFO] [stdout] 108 | |                 "\n    register_message::<{}::{}>();",
[INFO] [stdout] 109 | |                 file.file_name, msg
[INFO] [stdout] 110 | |             ));
[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] 107 |             let _ = factory_file.write_fmt(format_args!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 114 |     factory_file.write(b"\n}\n");
[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] 114 |     let _ = factory_file.write(b"\n}\n");
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling protobuf_message_factory v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stdout]   |                                   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut contents = "use std::cell::RefCell;
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:93:5
[INFO] [stdout]    |
[INFO] [stdout] 93 |     mod_file.write(b"pub mod factory;\n");
[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] 93 |     let _ = mod_file.write(b"pub mod factory;\n");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     factory_file.write_all(&contents[..]);
[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] 95 |     let _ = factory_file.write_all(&contents[..]);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     factory_file.write(b"\n\n");
[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] 96 |     let _ = factory_file.write(b"\n\n");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |         factory_file.write_fmt(format_args!("use crate::{};\n", item.file_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] 99 |         let _ = factory_file.write_fmt(format_args!("use crate::{};\n", item.file_name));
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout] 100 |         mod_file.write_fmt(format_args!("pub mod {};\n", item.file_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] 100 |         let _ = mod_file.write_fmt(format_args!("pub mod {};\n", item.file_name));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:103:5
[INFO] [stdout]     |
[INFO] [stdout] 103 |     factory_file.write(b"\nfn init_descriptors() {");
[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 _ = factory_file.write(b"\nfn init_descriptors() {");
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 | /             factory_file.write_fmt(format_args!(
[INFO] [stdout] 108 | |                 "\n    register_message::<{}::{}>();",
[INFO] [stdout] 109 | |                 file.file_name, msg
[INFO] [stdout] 110 | |             ));
[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] 107 |             let _ = factory_file.write_fmt(format_args!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 114 |     factory_file.write(b"\n}\n");
[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] 114 |     let _ = factory_file.write(b"\n}\n");
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "d07c07ff6f0490409d189673a759833c0c85c4f7f85a7b6c8c99c2d2b2e9f048", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d07c07ff6f0490409d189673a759833c0c85c4f7f85a7b6c8c99c2d2b2e9f048", kill_on_drop: false }`
[INFO] [stdout] d07c07ff6f0490409d189673a759833c0c85c4f7f85a7b6c8c99c2d2b2e9f048
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7d1dec028ab2de0d811bb60ab3275c5939a302f83fcd052f53c7b13b61b4f0a7
[INFO] running `Command { std: "docker" "start" "-a" "7d1dec028ab2de0d811bb60ab3275c5939a302f83fcd052f53c7b13b61b4f0a7", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `Read`
[INFO] [stderr]  --> src/lib.rs:6:35
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io::{BufRead, BufReader, Read, Write};
[INFO] [stderr]   |                                   ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let mut contents = "use std::cell::RefCell;
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/lib.rs:93:5
[INFO] [stderr]    |
[INFO] [stderr] 93 |     mod_file.write(b"pub mod factory;\n");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 93 |     let _ = mod_file.write(b"pub mod factory;\n");
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/lib.rs:95:5
[INFO] [stderr]    |
[INFO] [stderr] 95 |     factory_file.write_all(&contents[..]);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 95 |     let _ = factory_file.write_all(&contents[..]);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/lib.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     factory_file.write(b"\n\n");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 96 |     let _ = factory_file.write(b"\n\n");
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/lib.rs:99:9
[INFO] [stderr]    |
[INFO] [stderr] 99 |         factory_file.write_fmt(format_args!("use crate::{};\n", item.file_name));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 99 |         let _ = factory_file.write_fmt(format_args!("use crate::{};\n", item.file_name));
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         mod_file.write_fmt(format_args!("pub mod {};\n", item.file_name));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 100 |         let _ = mod_file.write_fmt(format_args!("pub mod {};\n", item.file_name));
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     factory_file.write(b"\nfn init_descriptors() {");
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 103 |     let _ = factory_file.write(b"\nfn init_descriptors() {");
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:107:13
[INFO] [stderr]     |
[INFO] [stderr] 107 | /             factory_file.write_fmt(format_args!(
[INFO] [stderr] 108 | |                 "\n    register_message::<{}::{}>();",
[INFO] [stderr] 109 | |                 file.file_name, msg
[INFO] [stderr] 110 | |             ));
[INFO] [stderr]     | |______________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 107 |             let _ = factory_file.write_fmt(format_args!(
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/lib.rs:114:5
[INFO] [stderr]     |
[INFO] [stderr] 114 |     factory_file.write(b"\n}\n");
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 114 |     let _ = factory_file.write(b"\n}\n");
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `protobuf_message_factory` (lib) generated 10 warnings (run `cargo fix --lib -p protobuf_message_factory` to apply 2 suggestions)
[INFO] [stderr] warning: `protobuf_message_factory` (lib test) generated 10 warnings (10 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/protobuf_message_factory-5581b2e2ae8f3a32)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/protobuf_message_factory-556927e780be6181)
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests protobuf_message_factory
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7d1dec028ab2de0d811bb60ab3275c5939a302f83fcd052f53c7b13b61b4f0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d1dec028ab2de0d811bb60ab3275c5939a302f83fcd052f53c7b13b61b4f0a7", kill_on_drop: false }`
[INFO] [stdout] 7d1dec028ab2de0d811bb60ab3275c5939a302f83fcd052f53c7b13b61b4f0a7
