[INFO] cloning repository https://github.com/yportne13/type-inference-by-example-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yportne13/type-inference-by-example-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyportne13%2Ftype-inference-by-example-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyportne13%2Ftype-inference-by-example-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3818e82f8049f1b7704081483e74c9bd4a988841
[INFO] checking yportne13/type-inference-by-example-in-rust against master#36b21637e93b038453924d3c66821089e71d8baa for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyportne13%2Ftype-inference-by-example-in-rust" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yportne13/type-inference-by-example-in-rust
[INFO] finished tweaking git repo https://github.com/yportne13/type-inference-by-example-in-rust
[INFO] tweaked toml for git repo https://github.com/yportne13/type-inference-by-example-in-rust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yportne13/type-inference-by-example-in-rust on toolchain 36b21637e93b038453924d3c66821089e71d8baa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yportne13/type-inference-by-example-in-rust 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" "+36b21637e93b038453924d3c66821089e71d8baa" "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-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62a74139d30603ec404533285ae4782d8f68df830608e03657cc55c5b986ae15
[INFO] running `Command { std: "docker" "start" "-a" "62a74139d30603ec404533285ae4782d8f68df830608e03657cc55c5b986ae15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62a74139d30603ec404533285ae4782d8f68df830608e03657cc55c5b986ae15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62a74139d30603ec404533285ae4782d8f68df830608e03657cc55c5b986ae15", kill_on_drop: false }`
[INFO] [stdout] 62a74139d30603ec404533285ae4782d8f68df830608e03657cc55c5b986ae15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+36b21637e93b038453924d3c66821089e71d8baa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bbc1d45c12f0939f6a5725ad460758c8072b5b24feb8a82e3d18a2906418b80
[INFO] running `Command { std: "docker" "start" "-a" "5bbc1d45c12f0939f6a5725ad460758c8072b5b24feb8a82e3d18a2906418b80", kill_on_drop: false }`
[INFO] [stderr]     Checking hindley_milner v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Maybe` and `maybe`
[INFO] [stdout]  --> src/parser/mod.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{maybe, Maybe, Parser, Span};
[INFO] [stdout]   |            ^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Maybe` and `maybe`
[INFO] [stdout]  --> src/parser/mod.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{maybe, Maybe, Parser, Span};
[INFO] [stdout]   |            ^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `endline`
[INFO] [stdout]    --> src/parser/lex.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let endline = pmatch("\n").map(|x| x.map(|y| (y, EndLine)));
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_endline`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `endline`
[INFO] [stdout]    --> src/parser/lex.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let endline = pmatch("\n").map(|x| x.map(|y| (y, EndLine)));
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_endline`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fun`
[INFO] [stdout]    --> src/parser/mod.rs:176:17
[INFO] [stdout]     |
[INFO] [stdout] 176 |     let (input, fun) = kw(TokenKind::FunKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_fun`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arrow`
[INFO] [stdout]    --> src/parser/mod.rs:178:17
[INFO] [stdout]     |
[INFO] [stdout] 178 |     let (input, arrow) = kw(TokenKind::Arrow).parse(input)?;
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_arrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `if_kw`
[INFO] [stdout]    --> src/parser/mod.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let (input, if_kw) = kw(TokenKind::IfKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_if_kw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `then_kw`
[INFO] [stdout]    --> src/parser/mod.rs:189:17
[INFO] [stdout]     |
[INFO] [stdout] 189 |     let (input, then_kw) = kw(TokenKind::ThenKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_then_kw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `else_kw`
[INFO] [stdout]    --> src/parser/mod.rs:191:17
[INFO] [stdout]     |
[INFO] [stdout] 191 |     let (input, else_kw) = kw(TokenKind::ElseKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_else_kw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `keyword`
[INFO] [stdout]    --> src/parser/mod.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |     let (input, keyword) = kw(TokenKind::LetKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_keyword`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eq`
[INFO] [stdout]    --> src/parser/mod.rs:214:17
[INFO] [stdout]     |
[INFO] [stdout] 214 |     let (input, eq) = kw(TokenKind::Eq).parse(input)?;
[INFO] [stdout]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_eq`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]   --> src/part5/mod.rs:91:16
[INFO] [stdout]    |
[INFO] [stdout] 91 |             if let Constraint::Equality(t1, t2) = constraint {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]    = help: consider replacing the `if let` with a `let`
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable `if let` pattern
[INFO] [stdout]    --> src/part6/mod.rs:183:16
[INFO] [stdout]     |
[INFO] [stdout] 183 |             if let Constraint::CEquality(t1, t2) = constraint {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this pattern will always match, so the `if let` is useless
[INFO] [stdout]     = help: consider replacing the `if let` with a `let`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fun`
[INFO] [stdout]    --> src/parser/mod.rs:176:17
[INFO] [stdout]     |
[INFO] [stdout] 176 |     let (input, fun) = kw(TokenKind::FunKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_fun`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arrow`
[INFO] [stdout]    --> src/parser/mod.rs:178:17
[INFO] [stdout]     |
[INFO] [stdout] 178 |     let (input, arrow) = kw(TokenKind::Arrow).parse(input)?;
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_arrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `if_kw`
[INFO] [stdout]    --> src/parser/mod.rs:187:17
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let (input, if_kw) = kw(TokenKind::IfKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_if_kw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `then_kw`
[INFO] [stdout]    --> src/parser/mod.rs:189:17
[INFO] [stdout]     |
[INFO] [stdout] 189 |     let (input, then_kw) = kw(TokenKind::ThenKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_then_kw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `else_kw`
[INFO] [stdout]    --> src/parser/mod.rs:191:17
[INFO] [stdout]     |
[INFO] [stdout] 191 |     let (input, else_kw) = kw(TokenKind::ElseKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_else_kw`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `keyword`
[INFO] [stdout]    --> src/parser/mod.rs:212:17
[INFO] [stdout]     |
[INFO] [stdout] 212 |     let (input, keyword) = kw(TokenKind::LetKeyword).parse(input)?;
[INFO] [stdout]     |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_keyword`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eq`
[INFO] [stdout]    --> src/parser/mod.rs:214:17
[INFO] [stdout]     |
[INFO] [stdout] 214 |     let (input, eq) = kw(TokenKind::Eq).parse(input)?;
[INFO] [stdout]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_eq`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expect` is never used
[INFO] [stdout]  --> src/parser/mod.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub enum Expect {
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/parser/mod.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Lit(Span<'a, i32>),
[INFO] [stdout]    |     --- ^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Term` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 21 -     Lit(Span<'a, i32>),
[INFO] [stdout] 21 +     Lit(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hindley_milner` (bin "hindley_milner" test); 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/36b21637e93b038453924d3c66821089e71d8baa/bin/rustc --crate-name hindley_milner --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --test --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=5df89dd9963ece23 -C extra-filename=-b44e50f3c66534f5 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints=forbid` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `hindley_milner` (bin "hindley_milner"); 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/36b21637e93b038453924d3c66821089e71d8baa/bin/rustc --crate-name hindley_milner --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=e054926be00c521c -C extra-filename=-c27fdf6ff7ecc0f4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints=forbid` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5bbc1d45c12f0939f6a5725ad460758c8072b5b24feb8a82e3d18a2906418b80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bbc1d45c12f0939f6a5725ad460758c8072b5b24feb8a82e3d18a2906418b80", kill_on_drop: false }`
[INFO] [stdout] 5bbc1d45c12f0939f6a5725ad460758c8072b5b24feb8a82e3d18a2906418b80
