[INFO] cloning repository https://github.com/zongzi531/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zongzi531/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzongzi531%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzongzi531%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dcf7c60aecad6474095e9df0da0409a19ff70b09
[INFO] checking zongzi531/rust-learning against try#c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f for pr-133502-18
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzongzi531%2Frust-learning" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/zongzi531/rust-learning
[INFO] finished tweaking git repo https://github.com/zongzi531/rust-learning
[INFO] tweaked toml for git repo https://github.com/zongzi531/rust-learning written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zongzi531/rust-learning on toolchain c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zongzi531/rust-learning 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" "+c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d2392dfe66c3c5f9c331ea9f147c9a30d22434e52874a59e6efc3d9a2cbbf7c7
[INFO] running `Command { std: "docker" "start" "-a" "d2392dfe66c3c5f9c331ea9f147c9a30d22434e52874a59e6efc3d9a2cbbf7c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2392dfe66c3c5f9c331ea9f147c9a30d22434e52874a59e6efc3d9a2cbbf7c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2392dfe66c3c5f9c331ea9f147c9a30d22434e52874a59e6efc3d9a2cbbf7c7", kill_on_drop: false }`
[INFO] [stdout] d2392dfe66c3c5f9c331ea9f147c9a30d22434e52874a59e6efc3d9a2cbbf7c7
[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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+c9557a20e5ef2e0e02c29a5fafd850d1b7cf1e4f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d2803bfb5860ca18420213d064c080dde2e38ec7764ae9df7ae42b8795ee2c5
[INFO] running `Command { std: "docker" "start" "-a" "3d2803bfb5860ca18420213d064c080dde2e38ec7764ae9df7ae42b8795ee2c5", kill_on_drop: false }`
[INFO] [stderr]     Checking utf8_slice v1.0.0
[INFO] [stderr]     Checking rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]  --> src/bin/compound-types-tuple-1.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |   let t: (u8, u16, i64, &str, String) = (1u8, 2u16, 3i64, "hello", String::from(", world"));
[INFO] [stdout]   |       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `invalid_output` is never used
[INFO] [stdout]   --> src/bin/lifetime-basic-4.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn invalid_output<'a>(s: &'a String) -> &'a String { 
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]  --> src/bin/compound-types-slice-1.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 |   let s1: &[i32] = &arr[0..2];
[INFO] [stdout]   |       ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]  --> src/bin/compound-types-slice-1.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 |   let s2: &str = "hello, world" as &str;
[INFO] [stdout]   |       ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]  --> src/bin/lifetime-basic-7.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Example<'a, 'b> {
[INFO] [stdout]   |        ------- fields in this struct
[INFO] [stdout] 8 |     a: &'a u32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 9 |     b: &'b NoCopyType
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Example` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Zero` and `Two` are never constructed
[INFO] [stdout]  --> src/bin/compound-types-enum-1.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Number {
[INFO] [stdout]   |      ------ variants in this enum
[INFO] [stdout] 4 |   Zero,
[INFO] [stdout]   |   ^^^^
[INFO] [stdout] 5 |   One,
[INFO] [stdout] 6 |   Two,
[INFO] [stdout]   |   ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Zero` and `Two` are never constructed
[INFO] [stdout]   --> src/bin/compound-types-enum-1.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout]  9 | enum Number1 {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 10 |   Zero = 0,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 11 |   One,
[INFO] [stdout] 12 |   Two,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Zero` and `Two` are never constructed
[INFO] [stdout]   --> src/bin/compound-types-enum-1.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum Number2 {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 17 |   Zero = 0,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 18 |   One = 1,
[INFO] [stdout] 19 |   Two = 2,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/bin/compound-types-struct-5.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Person {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_person` is never used
[INFO] [stdout]  --> src/bin/compound-types-struct-5.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn build_person(name: String, age: u8) -> Person {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0001]: `-Znext-solver=globally` and `generic_const_exprs` are incompatible, using them at the same time is not allowed
[INFO] [stdout]  --> src/bin/generics-traits-const-generics-3.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: remove one of these features
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0001`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-learning` (bin "generics-traits-const-generics-3" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variants `Zero` and `Two` are never constructed
[INFO] [stdout]  --> src/bin/compound-types-enum-1.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Number {
[INFO] [stdout]   |      ------ variants in this enum
[INFO] [stdout] 4 |   Zero,
[INFO] [stdout]   |   ^^^^
[INFO] [stdout] 5 |   One,
[INFO] [stdout] 6 |   Two,
[INFO] [stdout]   |   ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Zero` and `Two` are never constructed
[INFO] [stdout]   --> src/bin/compound-types-enum-1.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout]  9 | enum Number1 {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 10 |   Zero = 0,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 11 |   One,
[INFO] [stdout] 12 |   Two,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Zero` and `Two` are never constructed
[INFO] [stdout]   --> src/bin/compound-types-enum-1.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum Number2 {
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 17 |   Zero = 0,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 18 |   One = 1,
[INFO] [stdout] 19 |   Two = 2,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]  --> src/bin/compound-types-struct-7.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Rectangle {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 5 |     width: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 6 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_option` is never used
[INFO] [stdout]  --> src/bin/basic-types-functions-4.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn get_option(tp: u8) -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `never_return_fn` is never used
[INFO] [stdout]   --> src/bin/basic-types-functions-4.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn never_return_fn() -> ! {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3d2803bfb5860ca18420213d064c080dde2e38ec7764ae9df7ae42b8795ee2c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d2803bfb5860ca18420213d064c080dde2e38ec7764ae9df7ae42b8795ee2c5", kill_on_drop: false }`
[INFO] [stdout] 3d2803bfb5860ca18420213d064c080dde2e38ec7764ae9df7ae42b8795ee2c5