[INFO] cloning repository https://github.com/iBrainiac/rust_lessons
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iBrainiac/rust_lessons" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiBrainiac%2Frust_lessons", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiBrainiac%2Frust_lessons'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 480feb443e75594d35104310fbf87c9c8093a7a0
[INFO] checking iBrainiac/rust_lessons against try#5fee451ebd94296ea05214e819c311e164b30af6 for pr-139042
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FiBrainiac%2Frust_lessons" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iBrainiac/rust_lessons on toolchain 5fee451ebd94296ea05214e819c311e164b30af6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5fee451ebd94296ea05214e819c311e164b30af6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iBrainiac/rust_lessons
[INFO] finished tweaking git repo https://github.com/iBrainiac/rust_lessons
[INFO] tweaked toml for git repo https://github.com/iBrainiac/rust_lessons written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/iBrainiac/rust_lessons 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" "+5fee451ebd94296ea05214e819c311e164b30af6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+5fee451ebd94296ea05214e819c311e164b30af6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d07f4394e42a438b00ba01e41d53fbb768bf63fc9067d467eb6e123bd4796458
[INFO] running `Command { std: "docker" "start" "-a" "d07f4394e42a438b00ba01e41d53fbb768bf63fc9067d467eb6e123bd4796458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d07f4394e42a438b00ba01e41d53fbb768bf63fc9067d467eb6e123bd4796458", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d07f4394e42a438b00ba01e41d53fbb768bf63fc9067d467eb6e123bd4796458", kill_on_drop: false }`
[INFO] [stdout] d07f4394e42a438b00ba01e41d53fbb768bf63fc9067d467eb6e123bd4796458
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+5fee451ebd94296ea05214e819c311e164b30af6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef42a6439d1efd0c125b3197d41f1d05ee2258f928af9333c1f90374913efaaf
[INFO] running `Command { std: "docker" "start" "-a" "ef42a6439d1efd0c125b3197d41f1d05ee2258f928af9333c1f90374913efaaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking lessons v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `i8x32` and `isizex32`
[INFO] [stdout]  --> src/vector_tuples.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::simd::{i8x32, isizex32};
[INFO] [stdout]   |                 ^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/vector_tuples.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         for (i32)in tuples {
[INFO] [stdout]    |             ^   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 30 -         for (i32)in tuples {
[INFO] [stdout] 30 +         for i32 in tuples {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/vector_tuples.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         for (i32)in tuples {
[INFO] [stdout]    |             ^   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 36 -         for (i32)in tuples {
[INFO] [stdout] 36 +         for i32 in tuples {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `vector_tuples::elem_tuples`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use vector_tuples::elem_tuples;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `portable_simd`
[INFO] [stdout]  --> src/vector_tuples.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::simd::{i8x32, isizex32};
[INFO] [stdout]   |                 ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #86656 <https://github.com/rust-lang/rust/issues/86656> for more information
[INFO] [stdout]   = help: add `#![feature(portable_simd)]` to the crate attributes to enable
[INFO] [stdout]   = note: this compiler was built on 2025-03-30; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `portable_simd`
[INFO] [stdout]  --> src/vector_tuples.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::simd::{i8x32, isizex32};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #86656 <https://github.com/rust-lang/rust/issues/86656> for more information
[INFO] [stdout]   = help: add `#![feature(portable_simd)]` to the crate attributes to enable
[INFO] [stdout]   = note: this compiler was built on 2025-03-30; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `i8x32` and `isizex32`
[INFO] [stdout]  --> src/vector_tuples.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::simd::{i8x32, isizex32};
[INFO] [stdout]   |                 ^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/vector_tuples.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         for (i32)in tuples {
[INFO] [stdout]    |             ^   ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 30 -         for (i32)in tuples {
[INFO] [stdout] 30 +         for i32 in tuples {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/vector_tuples.rs:36:13
[INFO] [stdout]    |
[INFO] [stdout] 36 |         for (i32)in tuples {
[INFO] [stdout]    |             ^   ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 36 -         for (i32)in tuples {
[INFO] [stdout] 36 +         for i32 in tuples {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `vector_tuples::elem_tuples`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use vector_tuples::elem_tuples;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `portable_simd`
[INFO] [stdout]  --> src/vector_tuples.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::simd::{i8x32, isizex32};
[INFO] [stdout]   |                 ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #86656 <https://github.com/rust-lang/rust/issues/86656> for more information
[INFO] [stdout]   = help: add `#![feature(portable_simd)]` to the crate attributes to enable
[INFO] [stdout]   = note: this compiler was built on 2025-03-30; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `portable_simd`
[INFO] [stdout]  --> src/vector_tuples.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::simd::{i8x32, isizex32};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #86656 <https://github.com/rust-lang/rust/issues/86656> for more information
[INFO] [stdout]   = help: add `#![feature(portable_simd)]` to the crate attributes to enable
[INFO] [stdout]   = note: this compiler was built on 2025-03-30; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_sum`
[INFO] [stdout]   --> src/vector_tuples.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut first_sum = 0;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_sum`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `even_first`
[INFO] [stdout]   --> src/vector_tuples.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut even_first:bool = true;
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_even_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `odd_second`
[INFO] [stdout]   --> src/vector_tuples.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut odd_second: bool = true;
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_odd_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i32`
[INFO] [stdout]   --> src/vector_tuples.rs:30:14
[INFO] [stdout]    |
[INFO] [stdout] 30 |         for (i32)in tuples {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i32`
[INFO] [stdout]   --> src/vector_tuples.rs:36:14
[INFO] [stdout]    |
[INFO] [stdout] 36 |         for (i32)in tuples {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut first_sum = 0;
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut odd_first:bool = true;
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut even_second: bool = true;
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut even_first:bool = true;
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut odd_second: bool = true;
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lessons` (bin "lessons") due to 2 previous errors; 14 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `first_sum`
[INFO] [stdout]   --> src/vector_tuples.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut first_sum = 0;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_sum`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `even_first`
[INFO] [stdout]   --> src/vector_tuples.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut even_first:bool = true;
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_even_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `odd_second`
[INFO] [stdout]   --> src/vector_tuples.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut odd_second: bool = true;
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_odd_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i32`
[INFO] [stdout]   --> src/vector_tuples.rs:30:14
[INFO] [stdout]    |
[INFO] [stdout] 30 |         for (i32)in tuples {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i32`
[INFO] [stdout]   --> src/vector_tuples.rs:36:14
[INFO] [stdout]    |
[INFO] [stdout] 36 |         for (i32)in tuples {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut first_sum = 0;
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut odd_first:bool = true;
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lessons` (bin "lessons" test) due to 2 previous errors; 14 warnings emitted
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut even_second: bool = true;
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let mut even_first:bool = true;
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/vector_tuples.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut odd_second: bool = true;
[INFO] [stdout]    |         ----^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ef42a6439d1efd0c125b3197d41f1d05ee2258f928af9333c1f90374913efaaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef42a6439d1efd0c125b3197d41f1d05ee2258f928af9333c1f90374913efaaf", kill_on_drop: false }`
[INFO] [stdout] ef42a6439d1efd0c125b3197d41f1d05ee2258f928af9333c1f90374913efaaf