[INFO] crate protobuf_message_factory 0.1.3 is already in cache
[INFO] checking protobuf_message_factory-0.1.3 against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] extracting crate protobuf_message_factory 0.1.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate protobuf_message_factory 0.1.3 on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[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/source/Cargo.toml
[INFO] crate crates.io crate protobuf_message_factory 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e1d981fdf5d9d1211788694c45cf1e0443da3fe70dc1924427d60e881eb7931f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "e1d981fdf5d9d1211788694c45cf1e0443da3fe70dc1924427d60e881eb7931f"`
[INFO] [stderr]     Checking protobuf_message_factory v0.1.3 (/opt/rustwide/workdir)
[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)]` on by default
[INFO] [stderr] 
[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)]` 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)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::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: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[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)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::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: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr] warning: unused `std::result::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] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "e1d981fdf5d9d1211788694c45cf1e0443da3fe70dc1924427d60e881eb7931f"`
[INFO] running `"docker" "rm" "-f" "e1d981fdf5d9d1211788694c45cf1e0443da3fe70dc1924427d60e881eb7931f"`
[INFO] [stdout] e1d981fdf5d9d1211788694c45cf1e0443da3fe70dc1924427d60e881eb7931f
