[INFO] cloning repository https://github.com/rickmugridge/rust-experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rickmugridge/rust-experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frickmugridge%2Frust-experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frickmugridge%2Frust-experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ba2a798c54b22f4146f27557b5c2db79d2579215
[INFO] checking rickmugridge/rust-experiments against master#8f21a5c92ea55c348c275a1bc4fedbdf181e0d64 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frickmugridge%2Frust-experiments" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rickmugridge/rust-experiments
[INFO] finished tweaking git repo https://github.com/rickmugridge/rust-experiments
[INFO] tweaked toml for git repo https://github.com/rickmugridge/rust-experiments written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rickmugridge/rust-experiments on toolchain 8f21a5c92ea55c348c275a1bc4fedbdf181e0d64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rickmugridge/rust-experiments 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" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40e8925754c505f4ed065cbecce6f8732b3bf9c90f18c10fb34ae380b244c8db
[INFO] running `Command { std: "docker" "start" "-a" "40e8925754c505f4ed065cbecce6f8732b3bf9c90f18c10fb34ae380b244c8db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40e8925754c505f4ed065cbecce6f8732b3bf9c90f18c10fb34ae380b244c8db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40e8925754c505f4ed065cbecce6f8732b3bf9c90f18c10fb34ae380b244c8db", kill_on_drop: false }`
[INFO] [stdout] 40e8925754c505f4ed065cbecce6f8732b3bf9c90f18c10fb34ae380b244c8db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae552e8b16e67539a1642f8412fb30cca11830614ff655e8baee1a91c7dc1d60
[INFO] running `Command { std: "docker" "start" "-a" "ae552e8b16e67539a1642f8412fb30cca11830614ff655e8baee1a91c7dc1d60", kill_on_drop: false }`
[INFO] [stderr]     Checking experiments v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0412]: cannot find type `Double` in this scope
[INFO] [stdout]   --> src/lifetime/simple_in_struct.rs:24:14
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl<'a, 'b> Double<'a, 'b> {
[INFO] [stdout]    |              ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Double` in this scope
[INFO] [stdout]   --> src/lifetime/simple_in_struct.rs:30:51
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn make_double<'a, 'b>(p: &'a u32, q: &'b u32) -> Double<'a, 'b> {
[INFO] [stdout]    |                                                   ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Double` in this scope
[INFO] [stdout]   --> src/lifetime/simple_in_struct.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     Double { p, q }
[INFO] [stdout]    |     ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0422.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `experiments` (bin "experiments") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: struct `Lines` is never constructed
[INFO] [stdout]   --> src/traits/with_mutable.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Lines {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.deref()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/closure/closure_traits.rs:104:43
[INFO] [stdout]     |
[INFO] [stdout] 104 |         let _cc: &dyn FnOnce() = capture_s.deref();
[INFO] [stdout]     |                                           ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `dyn FnOnce()` does not implement `Deref`, so calling `deref` on `&dyn FnOnce()` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]  --> src/lifetime/simple_in_struct.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn make_simple(p: &u32) -> Simple {
[INFO] [stdout]   |                   ^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]   |                   |
[INFO] [stdout]   |                   this lifetime flows to the output
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn make_simple(p: &u32) -> Simple<'_> {
[INFO] [stdout]   |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]  --> src/lifetime/simple_in_struct.rs:9:39
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn make_simple_recursively(i: u32, p: &u32) -> Simple {
[INFO] [stdout]   |                                       ^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]   |                                       |
[INFO] [stdout]   |                                       this lifetime flows to the output
[INFO] [stdout]   |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn make_simple_recursively(i: u32, p: &u32) -> Simple<'_> {
[INFO] [stdout]   |                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/lifetime/fn_with_lifetime.rs:41:32
[INFO] [stdout]    |
[INFO] [stdout] 41 |         fn make_closure_ref(c: & dyn Fn() -> i32) -> ClosureRef {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                                |
[INFO] [stdout]    |                                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 41 |         fn make_closure_ref(c: & dyn Fn() -> i32) -> ClosureRef<'_> {
[INFO] [stdout]    |                                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ae552e8b16e67539a1642f8412fb30cca11830614ff655e8baee1a91c7dc1d60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae552e8b16e67539a1642f8412fb30cca11830614ff655e8baee1a91c7dc1d60", kill_on_drop: false }`
[INFO] [stdout] ae552e8b16e67539a1642f8412fb30cca11830614ff655e8baee1a91c7dc1d60