[INFO] fetching crate veho 0.0.16...
[INFO] checking veho-0.0.16 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate veho 0.0.16 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate veho 0.0.16 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate veho 0.0.16
[INFO] finished tweaking crates.io crate veho 0.0.16
[INFO] tweaked toml for crates.io crate veho 0.0.16 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 598ec2b9d36c8d8224592ed00fbf7a52d6acd3e153fe6b647bfb49e21c617185
[INFO] running `Command { std: "docker" "start" "-a" "598ec2b9d36c8d8224592ed00fbf7a52d6acd3e153fe6b647bfb49e21c617185", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "598ec2b9d36c8d8224592ed00fbf7a52d6acd3e153fe6b647bfb49e21c617185", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "598ec2b9d36c8d8224592ed00fbf7a52d6acd3e153fe6b647bfb49e21c617185", kill_on_drop: false }`
[INFO] [stdout] 598ec2b9d36c8d8224592ed00fbf7a52d6acd3e153fe6b647bfb49e21c617185
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 098d7c8c5962a3480024e87c354a6e9ef5ce66e42d055eba8af2d63507be4ed7
[INFO] running `Command { std: "docker" "start" "-a" "098d7c8c5962a3480024e87c354a6e9ef5ce66e42d055eba8af2d63507be4ed7", kill_on_drop: false }`
[INFO] [stderr]     Checking veho v0.0.16 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/vector/mappers.rs:17:40
[INFO] [stdout]    |
[INFO] [stdout] 17 |     { for x in &mut self.into_iter() { &f(&mut *x); } }
[INFO] [stdout]    |                                        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/vector/mappers.rs:32:57
[INFO] [stdout]    |
[INFO] [stdout] 32 |     { for (i, x) in &mut self.into_iter().enumerate() { &f(i, &mut *x); } }
[INFO] [stdout]    |                                                         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/matrix/mutaters.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |                 &f(&mut *x);
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/matrix/mutaters.rs:26:17
[INFO] [stdout]    |
[INFO] [stdout] 26 |                 &f(i, j, &mut *x);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> tests/alpha/columns_test/mapper_test.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/vector/mappers.rs:17:40
[INFO] [stdout]    |
[INFO] [stdout] 17 |     { for x in &mut self.into_iter() { &f(&mut *x); } }
[INFO] [stdout]    |                                        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/vector/mappers.rs:32:57
[INFO] [stdout]    |
[INFO] [stdout] 32 |     { for (i, x) in &mut self.into_iter().enumerate() { &f(i, &mut *x); } }
[INFO] [stdout]    |                                                         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/vector/mappers.rs:94:13
[INFO] [stdout]    |
[INFO] [stdout] 94 |             &mut text.push_str(&x.to_string());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/matrix/mappers.rs:127:13
[INFO] [stdout]     |
[INFO] [stdout] 127 |             &mut text.push_str(&format!("#{:0>6X}", x));
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/matrix/mutaters.rs:14:17
[INFO] [stdout]    |
[INFO] [stdout] 14 |                 &f(&mut *x);
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/matrix/mutaters.rs:26:17
[INFO] [stdout]    |
[INFO] [stdout] 26 |                 &f(i, j, &mut *x);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> tests/alpha/mut_test/simplest_iter_mut_test_worked.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         &f(&mut *x);
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> tests/alpha/mut_test/matrix_iter_mut_test_not_worked.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |         &f(&mut *x);
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `Command { std: "docker" "inspect" "098d7c8c5962a3480024e87c354a6e9ef5ce66e42d055eba8af2d63507be4ed7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "098d7c8c5962a3480024e87c354a6e9ef5ce66e42d055eba8af2d63507be4ed7", kill_on_drop: false }`
[INFO] [stdout] 098d7c8c5962a3480024e87c354a6e9ef5ce66e42d055eba8af2d63507be4ed7