[INFO] cloning repository https://github.com/jparoz/huck
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jparoz/huck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjparoz%2Fhuck", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjparoz%2Fhuck'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f6107d31c3b5a8286a3effdfbfde6df6569270d7
[INFO] checking jparoz/huck against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjparoz%2Fhuck" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jparoz/huck on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jparoz/huck
[INFO] finished tweaking git repo https://github.com/jparoz/huck
[INFO] tweaked toml for git repo https://github.com/jparoz/huck written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/jparoz/huck already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7df93ccbd003a6efabb62d274438e1aa6b34616028bbf9450d4fc9f23521a83c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7df93ccbd003a6efabb62d274438e1aa6b34616028bbf9450d4fc9f23521a83c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7df93ccbd003a6efabb62d274438e1aa6b34616028bbf9450d4fc9f23521a83c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7df93ccbd003a6efabb62d274438e1aa6b34616028bbf9450d4fc9f23521a83c", kill_on_drop: false }`
[INFO] [stdout] 7df93ccbd003a6efabb62d274438e1aa6b34616028bbf9450d4fc9f23521a83c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fde1f6086f70af99a26cda7695d1c9e5018194a028d1cb0f1e130ee501fb9fed
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fde1f6086f70af99a26cda7695d1c9e5018194a028d1cb0f1e130ee501fb9fed", kill_on_drop: false }`
[INFO] [stderr]     Checking huck v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TokenType` is imported redundantly
[INFO] [stdout]    --> src/lex.rs:220:13
[INFO] [stdout]     |
[INFO] [stdout] 16  | / pub enum TokenType {
[INFO] [stdout] 17  | |     Module,
[INFO] [stdout] 18  | |     Class,
[INFO] [stdout] 19  | |     Type,
[INFO] [stdout] ...   |
[INFO] [stdout] 41  | |     Hash,
[INFO] [stdout] 42  | | }
[INFO] [stdout]     | |_- the item `TokenType` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 220 |           use lex::TokenType;
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:604:20
[INFO] [stdout]     |
[INFO] [stdout] 604 |                 '0'...'9' => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:683:12
[INFO] [stdout]     |
[INFO] [stdout] 683 |         'a'...'z' | 'A'...'Z' | '_' => true,
[INFO] [stdout]     |            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:683:24
[INFO] [stdout]     |
[INFO] [stdout] 683 |         'a'...'z' | 'A'...'Z' | '_' => true,
[INFO] [stdout]     |                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:690:12
[INFO] [stdout]     |
[INFO] [stdout] 690 |         'a'...'z' | 'A'...'Z' | '0'...'9' | '_' | '\'' => true,
[INFO] [stdout]     |            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:690:24
[INFO] [stdout]     |
[INFO] [stdout] 690 |         'a'...'z' | 'A'...'Z' | '0'...'9' | '_' | '\'' => true,
[INFO] [stdout]     |                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:690:36
[INFO] [stdout]     |
[INFO] [stdout] 690 |         'a'...'z' | 'A'...'Z' | '0'...'9' | '_' | '\'' => true,
[INFO] [stdout]     |                                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TokenType` is imported redundantly
[INFO] [stdout]    --> src/lex.rs:220:13
[INFO] [stdout]     |
[INFO] [stdout] 16  | / pub enum TokenType {
[INFO] [stdout] 17  | |     Module,
[INFO] [stdout] 18  | |     Class,
[INFO] [stdout] 19  | |     Type,
[INFO] [stdout] ...   |
[INFO] [stdout] 41  | |     Hash,
[INFO] [stdout] 42  | | }
[INFO] [stdout]     | |_- the item `TokenType` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 220 |           use lex::TokenType;
[INFO] [stdout]     |               ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:604:20
[INFO] [stdout]     |
[INFO] [stdout] 604 |                 '0'...'9' => {
[INFO] [stdout]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:683:12
[INFO] [stdout]     |
[INFO] [stdout] 683 |         'a'...'z' | 'A'...'Z' | '_' => true,
[INFO] [stdout]     |            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:683:24
[INFO] [stdout]     |
[INFO] [stdout] 683 |         'a'...'z' | 'A'...'Z' | '_' => true,
[INFO] [stdout]     |                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:690:12
[INFO] [stdout]     |
[INFO] [stdout] 690 |         'a'...'z' | 'A'...'Z' | '0'...'9' | '_' | '\'' => true,
[INFO] [stdout]     |            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:690:24
[INFO] [stdout]     |
[INFO] [stdout] 690 |         'a'...'z' | 'A'...'Z' | '0'...'9' | '_' | '\'' => true,
[INFO] [stdout]     |                        ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/lex.rs:690:36
[INFO] [stdout]     |
[INFO] [stdout] 690 |         'a'...'z' | 'A'...'Z' | '0'...'9' | '_' | '\'' => true,
[INFO] [stdout]     |                                    ^^^ help: use `..=` for an inclusive range
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `TypeSignature`
[INFO] [stdout]   --> src/ast.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     TypeSignature { names: Vec<&'a str>, typ: Type<'a> },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lit`
[INFO] [stdout]   --> src/ast.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Lit(Literal),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Var`
[INFO] [stdout]   --> src/ast.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Var(&'a str),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lam`
[INFO] [stdout]   --> src/ast.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Lam(Lambda<'a>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `App`
[INFO] [stdout]   --> src/ast.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     App(Box<Expr<'a>>, Box<Expr<'a>>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Var`
[INFO] [stdout]   --> src/ast.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     Var(&'a str),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Concrete`
[INFO] [stdout]   --> src/ast.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     Concrete(&'a str),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `App`
[INFO] [stdout]   --> src/ast.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     App(Box<Type<'a>>, Box<Type<'a>>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `TypeSignature`
[INFO] [stdout]   --> src/ast.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     TypeSignature { names: Vec<&'a str>, typ: Type<'a> },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lit`
[INFO] [stdout]   --> src/ast.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Lit(Literal),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Var`
[INFO] [stdout]   --> src/ast.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Var(&'a str),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lam`
[INFO] [stdout]   --> src/ast.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Lam(Lambda<'a>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `App`
[INFO] [stdout]   --> src/ast.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     App(Box<Expr<'a>>, Box<Expr<'a>>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Var`
[INFO] [stdout]   --> src/ast.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     Var(&'a str),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Concrete`
[INFO] [stdout]   --> src/ast.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     Concrete(&'a str),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `App`
[INFO] [stdout]   --> src/ast.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     App(Box<Type<'a>>, Box<Type<'a>>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "fde1f6086f70af99a26cda7695d1c9e5018194a028d1cb0f1e130ee501fb9fed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fde1f6086f70af99a26cda7695d1c9e5018194a028d1cb0f1e130ee501fb9fed", kill_on_drop: false }`
[INFO] [stdout] fde1f6086f70af99a26cda7695d1c9e5018194a028d1cb0f1e130ee501fb9fed