[INFO] cloning repository https://github.com/tttmmmyyyy/fixlang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tttmmmyyyy/fixlang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftttmmmyyyy%2Ffixlang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftttmmmyyyy%2Ffixlang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6f4293be9665abc8e3d33e25418089e8906dd841
[INFO] checking tttmmmyyyy/fixlang/6f4293be9665abc8e3d33e25418089e8906dd841 against master#ab1d2444533d829e2d5cff6634cd3c70de6d7103 for pr-147841
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftttmmmyyyy%2Ffixlang" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tttmmmyyyy/fixlang
[INFO] finished tweaking git repo https://github.com/tttmmmyyyy/fixlang
[INFO] tweaked toml for git repo https://github.com/tttmmmyyyy/fixlang written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tttmmmyyyy/fixlang on toolchain ab1d2444533d829e2d5cff6634cd3c70de6d7103
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab1d2444533d829e2d5cff6634cd3c70de6d7103" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tttmmmyyyy/fixlang 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" "+ab1d2444533d829e2d5cff6634cd3c70de6d7103" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ab1d2444533d829e2d5cff6634cd3c70de6d7103" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "0afe00cf28d8668455575c7c64b0c03c8f566643a665b63e6e6b08d21efbffb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0afe00cf28d8668455575c7c64b0c03c8f566643a665b63e6e6b08d21efbffb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0afe00cf28d8668455575c7c64b0c03c8f566643a665b63e6e6b08d21efbffb7", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ab1d2444533d829e2d5cff6634cd3c70de6d7103" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "31f6fdd33adac0eb3644abec3ae8332702c9c9601482df428ca3db4b1762b6a8", kill_on_drop: false }`
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[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/builtin.rs:220:30
[INFO] [stdout]     |
[INFO] [stdout] 220 |                     .map(|i| (make_tyvar(&format!("a{}", i), &kind_star())))
[INFO] [stdout]     |                              ^                                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 220 -                     .map(|i| (make_tyvar(&format!("a{}", i), &kind_star())))
[INFO] [stdout] 220 +                     .map(|i| make_tyvar(&format!("a{}", i), &kind_star()) )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]    --> src/builtin.rs:220:30
[INFO] [stdout]     |
[INFO] [stdout] 220 |                     .map(|i| (make_tyvar(&format!("a{}", i), &kind_star())))
[INFO] [stdout]     |                              ^                                            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 220 -                     .map(|i| (make_tyvar(&format!("a{}", i), &kind_star())))
[INFO] [stdout] 220 +                     .map(|i| make_tyvar(&format!("a{}", i), &kind_star()) )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/generator.rs:1763:36
[INFO] [stdout]      |
[INFO] [stdout] 1763 |     pub fn create_debug_subprogram(&self, fn_name: &str, span: Option<Span>) -> DISubprogram {
[INFO] [stdout]      |                                    ^^^^^ the lifetime is elided here            ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]      = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1763 |     pub fn create_debug_subprogram(&self, fn_name: &str, span: Option<Span>) -> DISubprogram<'_> {
[INFO] [stdout]      |                                                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]     --> src/generator.rs:1763:36
[INFO] [stdout]      |
[INFO] [stdout] 1763 |     pub fn create_debug_subprogram(&self, fn_name: &str, span: Option<Span>) -> DISubprogram {
[INFO] [stdout]      |                                    ^^^^^ the lifetime is elided here            ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]      |
[INFO] [stdout]      = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]      = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]      |
[INFO] [stdout] 1763 |     pub fn create_debug_subprogram(&self, fn_name: &str, span: Option<Span>) -> DISubprogram<'_> {
[INFO] [stdout]      |                                                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 08s
[INFO] running `Command { std: "docker" "inspect" "31f6fdd33adac0eb3644abec3ae8332702c9c9601482df428ca3db4b1762b6a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31f6fdd33adac0eb3644abec3ae8332702c9c9601482df428ca3db4b1762b6a8", kill_on_drop: false }`
[INFO] [stdout] 31f6fdd33adac0eb3644abec3ae8332702c9c9601482df428ca3db4b1762b6a8