[INFO] fetching crate cf-quick-scanf-like-input 0.1.0...
[INFO] checking cf-quick-scanf-like-input-0.1.0 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate cf-quick-scanf-like-input 0.1.0 into /workspace/builds/worker-6-tc2/source
[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-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cf-quick-scanf-like-input 0.1.0 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa41e5b15234ef67b5969adcaed8875f633ef00a125c79b9fdb8bbb328805871
[INFO] running `Command { std: "docker" "start" "-a" "fa41e5b15234ef67b5969adcaed8875f633ef00a125c79b9fdb8bbb328805871", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa41e5b15234ef67b5969adcaed8875f633ef00a125c79b9fdb8bbb328805871", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa41e5b15234ef67b5969adcaed8875f633ef00a125c79b9fdb8bbb328805871", kill_on_drop: false }`
[INFO] [stdout] fa41e5b15234ef67b5969adcaed8875f633ef00a125c79b9fdb8bbb328805871
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8aa59d36e788c1497efa3793744f3774258808830b2567e87bdaf2e2871ffcb2
[INFO] running `Command { std: "docker" "start" "-a" "8aa59d36e788c1497efa3793744f3774258808830b2567e87bdaf2e2871ffcb2", kill_on_drop: false }`
[INFO] [stderr]     Checking cf-quick-scanf-like-input v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Read`, `Write`, and `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: `read_input_lines`
[INFO] [stdout]  --> src/lib.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | macro_rules! read_input_lines {
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `read_line_of_vars`
[INFO] [stdout]   --> src/lib.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 | macro_rules! read_line_of_vars {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Read`, `Write`, and `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: `read_input_lines`
[INFO] [stdout]  --> src/lib.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | macro_rules! read_input_lines {
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `read_line_of_vars`
[INFO] [stdout]   --> src/lib.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 | macro_rules! read_line_of_vars {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^
[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 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 the macro `read_line_of_vars` (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 the macro `read_line_of_vars` (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:50:30
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let mut lines: &[&str] = read_input_lines!(buf);
[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] 50 |     let mut lines: &[&str] = let _ = read_input_lines!(buf);
[INFO] [stdout]    |                              +++++++
[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 the macro `read_line_of_vars` (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 the macro `read_line_of_vars` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:50:30
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let mut lines: &[&str] = read_input_lines!(buf);
[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] 50 |     let mut lines: &[&str] = let _ = read_input_lines!(buf);
[INFO] [stdout]    |                              +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8aa59d36e788c1497efa3793744f3774258808830b2567e87bdaf2e2871ffcb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aa59d36e788c1497efa3793744f3774258808830b2567e87bdaf2e2871ffcb2", kill_on_drop: false }`
[INFO] [stdout] 8aa59d36e788c1497efa3793744f3774258808830b2567e87bdaf2e2871ffcb2