[INFO] fetching crate cf-quick-scanf-like-input 0.1.0...
[INFO] checking cf-quick-scanf-like-input-0.1.0 against master#50e1dc1536264ab71c0850f346b12309477f29f7 for pr-85073
[INFO] extracting crate cf-quick-scanf-like-input 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate cf-quick-scanf-like-input 0.1.0 on toolchain 50e1dc1536264ab71c0850f346b12309477f29f7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cf-quick-scanf-like-input 0.1.0
[INFO] finished tweaking crates.io crate cf-quick-scanf-like-input 0.1.0
[INFO] tweaked toml for crates.io crate cf-quick-scanf-like-input 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate cf-quick-scanf-like-input 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 730ead9f891ea154e658fca80195a1b475eb3071b51d7850aa7658cb20716b1d
[INFO] running `Command { std: "docker" "start" "-a" "730ead9f891ea154e658fca80195a1b475eb3071b51d7850aa7658cb20716b1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "730ead9f891ea154e658fca80195a1b475eb3071b51d7850aa7658cb20716b1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "730ead9f891ea154e658fca80195a1b475eb3071b51d7850aa7658cb20716b1d", kill_on_drop: false }`
[INFO] [stdout] 730ead9f891ea154e658fca80195a1b475eb3071b51d7850aa7658cb20716b1d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+50e1dc1536264ab71c0850f346b12309477f29f7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a31eb0fa1d2cd0f7dd2e3b085aa415a3d499bd830f927522df6f0b52e13fb3a
[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" "7a31eb0fa1d2cd0f7dd2e3b085aa415a3d499bd830f927522df6f0b52e13fb3a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking cf-quick-scanf-like-input v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `self`
[INFO] [stdout]  --> src/lib.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{self, Read, Write};
[INFO] [stdout]   |               ^^^^  ^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / macro_rules! read_input_lines {
[INFO] [stdout] 4  | |     ($buf:ident) => {
[INFO] [stdout] 5  | |     {
[INFO] [stdout] 6  | |         let mut stdin = io::stdin();
[INFO] [stdout] ...  |
[INFO] [stdout] 10 | |     }
[INFO] [stdout] 11 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / macro_rules! read_line_of_vars {
[INFO] [stdout] 14 | |     ($type:ty, $lines:ident, $($var:ident),+) => {
[INFO] [stdout] 15 | |     {
[INFO] [stdout] 16 | |         let (line, rest) = $lines.split_first().unwrap();
[INFO] [stdout] ...  |
[INFO] [stdout] 41 | |     }
[INFO] [stdout] 42 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, `self`
[INFO] [stdout]  --> src/lib.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{self, Read, Write};
[INFO] [stdout]   |               ^^^^  ^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / macro_rules! read_input_lines {
[INFO] [stdout] 4  | |     ($buf:ident) => {
[INFO] [stdout] 5  | |     {
[INFO] [stdout] 6  | |         let mut stdin = io::stdin();
[INFO] [stdout] ...  |
[INFO] [stdout] 10 | |     }
[INFO] [stdout] 11 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | / macro_rules! read_line_of_vars {
[INFO] [stdout] 14 | |     ($type:ty, $lines:ident, $($var:ident),+) => {
[INFO] [stdout] 15 | |     {
[INFO] [stdout] 16 | |         let (line, rest) = $lines.split_first().unwrap();
[INFO] [stdout] ...  |
[INFO] [stdout] 41 | |     }
[INFO] [stdout] 42 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{self, Read, Write};
[INFO] [stdout]   |                           ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parsed`
[INFO] [stdout]   --> src/main.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Some((value, parsed)) => {
[INFO] [stdout]    |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parsed`
[INFO] [stdout] ...
[INFO] [stdout] 54 |     read_line_of_vars!(i32, lines, t);
[INFO] [stdout]    |     ---------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{self, Read, Write};
[INFO] [stdout]   |                           ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parsed`
[INFO] [stdout]   --> src/main.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Some((value, parsed)) => {
[INFO] [stdout]    |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parsed`
[INFO] [stdout] ...
[INFO] [stdout] 58 |     read_line_of_vars!(i32, lines, n, x);
[INFO] [stdout]    |     ------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parsed`
[INFO] [stdout]   --> src/main.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Some((value, parsed)) => {
[INFO] [stdout]    |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parsed`
[INFO] [stdout] ...
[INFO] [stdout] 54 |     read_line_of_vars!(i32, lines, t);
[INFO] [stdout]    |     ---------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parsed`
[INFO] [stdout]   --> src/main.rs:30:20
[INFO] [stdout]    |
[INFO] [stdout] 30 |             Some((value, parsed)) => {
[INFO] [stdout]    |                          ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parsed`
[INFO] [stdout] ...
[INFO] [stdout] 58 |     read_line_of_vars!(i32, lines, n, x);
[INFO] [stdout]    |     ------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:7:6
[INFO] [stdout]    |
[INFO] [stdout] 7  |         stdin.read_to_string(&mut $buf);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     let mut lines: &[&str] = read_input_lines!(buf);
[INFO] [stdout]    |                              ---------------------- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:7:6
[INFO] [stdout]    |
[INFO] [stdout] 7  |         stdin.read_to_string(&mut $buf);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     let mut lines: &[&str] = read_input_lines!(buf);
[INFO] [stdout]    |                              ---------------------- in this macro invocation
[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]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "7a31eb0fa1d2cd0f7dd2e3b085aa415a3d499bd830f927522df6f0b52e13fb3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a31eb0fa1d2cd0f7dd2e3b085aa415a3d499bd830f927522df6f0b52e13fb3a", kill_on_drop: false }`
[INFO] [stdout] 7a31eb0fa1d2cd0f7dd2e3b085aa415a3d499bd830f927522df6f0b52e13fb3a