[INFO] cloning repository https://github.com/neverRare/butter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/neverRare/butter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FneverRare%2Fbutter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FneverRare%2Fbutter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ca0bee463af039645bd975886ecafb0002f6e671
[INFO] testing neverRare/butter against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FneverRare%2Fbutter" "/workspace/builds/worker-108/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-108/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/neverRare/butter on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/neverRare/butter
[INFO] finished tweaking git repo https://github.com/neverRare/butter
[INFO] tweaked toml for git repo https://github.com/neverRare/butter written to /workspace/builds/worker-108/source/Cargo.toml
[INFO] crate git repo https://github.com/neverRare/butter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06a9930f7724a1e1afc9b596dc0ac39de8110582939049f3f831e3e2b649f2cf
[INFO] running `Command { std: "docker" "start" "-a" "06a9930f7724a1e1afc9b596dc0ac39de8110582939049f3f831e3e2b649f2cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06a9930f7724a1e1afc9b596dc0ac39de8110582939049f3f831e3e2b649f2cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06a9930f7724a1e1afc9b596dc0ac39de8110582939049f3f831e3e2b649f2cf", kill_on_drop: false }`
[INFO] [stdout] 06a9930f7724a1e1afc9b596dc0ac39de8110582939049f3f831e3e2b649f2cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81ab22a6a151a5fb52c42fe2d80db4ad749f7c10ecd3850302674b0772fbbb40
[INFO] running `Command { std: "docker" "start" "-a" "81ab22a6a151a5fb52c42fe2d80db4ad749f7c10ecd3850302674b0772fbbb40", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling libc v0.2.104
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling hir v0.1.0 (/opt/rustwide/workdir/hir)
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling type-system v0.1.0 (/opt/rustwide/workdir/type-system)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> type-system/src/ty/cons.rs:346:21
[INFO] [stdout]     |
[INFO] [stdout] 345 |                     _ => return Err(TypeError::MismatchCons),
[INFO] [stdout]     |                     - matches any value
[INFO] [stdout] 346 |                     None => (),
[INFO] [stdout]     |                     ^^^^ unreachable pattern
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statements`
[INFO] [stdout]    --> type-system/src/lib.rs:259:14
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn infer(statements: Vec<Statement<()>>) -> Result<Vec<Statement<Type>>, TypeError> {
[INFO] [stdout]     |              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statements`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:33
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:39
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_rest`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:45
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:24
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_left1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:31
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:38
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:57
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_left2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:64
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:71
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `kind`
[INFO] [stdout]    --> type-system/src/ty.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn kind(&self) -> Kind {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hashmap_mut`
[INFO] [stdout]    --> type-system/src/ty.rs:319:8
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn hashmap_mut(&mut self) -> &mut HashMap<Var<'a>, Scheme<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]    --> type-system/src/ty.rs:326:8
[INFO] [stdout]     |
[INFO] [stdout] 326 |     fn remove(&mut self, var: Var<'a>) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `free_vars`
[INFO] [stdout]    --> type-system/src/ty.rs:329:8
[INFO] [stdout]     |
[INFO] [stdout] 329 |     fn free_vars(&self) -> HashSet<KindedVar<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `substitute`
[INFO] [stdout]    --> type-system/src/ty.rs:335:8
[INFO] [stdout]     |
[INFO] [stdout] 335 |     fn substitute(&mut self, subs: &Subs<'a>) -> Result<(), TypeError> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `generalize`
[INFO] [stdout]    --> type-system/src/ty.rs:341:8
[INFO] [stdout]     |
[INFO] [stdout] 341 |     fn generalize(&self, ty: Type<'a>) -> Scheme<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling combine v4.6.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling parser v0.1.0 (/opt/rustwide/workdir/parser)
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling structopt v0.3.25
[INFO] [stderr]    Compiling butter v0.1.0 (/opt/rustwide/workdir/cli)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 59.87s
[INFO] running `Command { std: "docker" "inspect" "81ab22a6a151a5fb52c42fe2d80db4ad749f7c10ecd3850302674b0772fbbb40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81ab22a6a151a5fb52c42fe2d80db4ad749f7c10ecd3850302674b0772fbbb40", kill_on_drop: false }`
[INFO] [stdout] 81ab22a6a151a5fb52c42fe2d80db4ad749f7c10ecd3850302674b0772fbbb40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68504fab98a9eedc70ee82b86db6153abf9da76840db8e9d44eb8f2718cb1bba
[INFO] running `Command { std: "docker" "start" "-a" "68504fab98a9eedc70ee82b86db6153abf9da76840db8e9d44eb8f2718cb1bba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling hir v0.1.0 (/opt/rustwide/workdir/hir)
[INFO] [stderr]    Compiling type-system v0.1.0 (/opt/rustwide/workdir/type-system)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> type-system/src/ty/cons.rs:346:21
[INFO] [stdout]     |
[INFO] [stdout] 345 |                     _ => return Err(TypeError::MismatchCons),
[INFO] [stdout]     |                     - matches any value
[INFO] [stdout] 346 |                     None => (),
[INFO] [stdout]     |                     ^^^^ unreachable pattern
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statements`
[INFO] [stdout]    --> type-system/src/lib.rs:259:14
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn infer(statements: Vec<Statement<()>>) -> Result<Vec<Statement<Type>>, TypeError> {
[INFO] [stdout]     |              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statements`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:33
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:39
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_rest`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:45
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:24
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_left1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:31
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:38
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:57
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_left2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:64
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:71
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `kind`
[INFO] [stdout]    --> type-system/src/ty.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn kind(&self) -> Kind {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hashmap_mut`
[INFO] [stdout]    --> type-system/src/ty.rs:319:8
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn hashmap_mut(&mut self) -> &mut HashMap<Var<'a>, Scheme<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]    --> type-system/src/ty.rs:326:8
[INFO] [stdout]     |
[INFO] [stdout] 326 |     fn remove(&mut self, var: Var<'a>) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `free_vars`
[INFO] [stdout]    --> type-system/src/ty.rs:329:8
[INFO] [stdout]     |
[INFO] [stdout] 329 |     fn free_vars(&self) -> HashSet<KindedVar<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `substitute`
[INFO] [stdout]    --> type-system/src/ty.rs:335:8
[INFO] [stdout]     |
[INFO] [stdout] 335 |     fn substitute(&mut self, subs: &Subs<'a>) -> Result<(), TypeError> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `generalize`
[INFO] [stdout]    --> type-system/src/ty.rs:341:8
[INFO] [stdout]     |
[INFO] [stdout] 341 |     fn generalize(&self, ty: Type<'a>) -> Scheme<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling parser v0.1.0 (/opt/rustwide/workdir/parser)
[INFO] [stderr]    Compiling butter v0.1.0 (/opt/rustwide/workdir/cli)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> type-system/src/ty/cons.rs:346:21
[INFO] [stdout]     |
[INFO] [stdout] 345 |                     _ => return Err(TypeError::MismatchCons),
[INFO] [stdout]     |                     - matches any value
[INFO] [stdout] 346 |                     None => (),
[INFO] [stdout]     |                     ^^^^ unreachable pattern
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `statements`
[INFO] [stdout]    --> type-system/src/lib.rs:259:14
[INFO] [stdout]     |
[INFO] [stdout] 259 | pub fn infer(statements: Vec<Statement<()>>) -> Result<Vec<Statement<Type>>, TypeError> {
[INFO] [stdout]     |              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statements`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:33
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:39
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_rest`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> type-system/src/ty/cons.rs:75:45
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stdout]    |                                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:24
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_left1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:31
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:38
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:57
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_left2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:64
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:393:71
[INFO] [stdout]     |
[INFO] [stdout] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `kind`
[INFO] [stdout]    --> type-system/src/ty.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn kind(&self) -> Kind {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hashmap_mut`
[INFO] [stdout]    --> type-system/src/ty.rs:319:8
[INFO] [stdout]     |
[INFO] [stdout] 319 |     fn hashmap_mut(&mut self) -> &mut HashMap<Var<'a>, Scheme<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]    --> type-system/src/ty.rs:326:8
[INFO] [stdout]     |
[INFO] [stdout] 326 |     fn remove(&mut self, var: Var<'a>) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `free_vars`
[INFO] [stdout]    --> type-system/src/ty.rs:329:8
[INFO] [stdout]     |
[INFO] [stdout] 329 |     fn free_vars(&self) -> HashSet<KindedVar<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `substitute`
[INFO] [stdout]    --> type-system/src/ty.rs:335:8
[INFO] [stdout]     |
[INFO] [stdout] 335 |     fn substitute(&mut self, subs: &Subs<'a>) -> Result<(), TypeError> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `generalize`
[INFO] [stdout]    --> type-system/src/ty.rs:341:8
[INFO] [stdout]     |
[INFO] [stdout] 341 |     fn generalize(&self, ty: Type<'a>) -> Scheme<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 33.91s
[INFO] running `Command { std: "docker" "inspect" "68504fab98a9eedc70ee82b86db6153abf9da76840db8e9d44eb8f2718cb1bba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68504fab98a9eedc70ee82b86db6153abf9da76840db8e9d44eb8f2718cb1bba", kill_on_drop: false }`
[INFO] [stdout] 68504fab98a9eedc70ee82b86db6153abf9da76840db8e9d44eb8f2718cb1bba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-108/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f950b8425384d0b5a5327cfcddb5314c8a8820e2b250434b0b319a7dd389f43b
[INFO] running `Command { std: "docker" "start" "-a" "f950b8425384d0b5a5327cfcddb5314c8a8820e2b250434b0b319a7dd389f43b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]    --> type-system/src/ty/cons.rs:346:21
[INFO] [stderr]     |
[INFO] [stderr] 345 |                     _ => return Err(TypeError::MismatchCons),
[INFO] [stderr]     |                     - matches any value
[INFO] [stderr] 346 |                     None => (),
[INFO] [stderr]     |                     ^^^^ unreachable pattern
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `statements`
[INFO] [stderr]    --> type-system/src/lib.rs:259:14
[INFO] [stderr]     |
[INFO] [stderr] 259 | pub fn infer(statements: Vec<Statement<()>>) -> Result<Vec<Statement<Type>>, TypeError> {
[INFO] [stderr]     |              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statements`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left`
[INFO] [stderr]   --> type-system/src/ty/cons.rs:75:33
[INFO] [stderr]    |
[INFO] [stderr] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stderr]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rest`
[INFO] [stderr]   --> type-system/src/ty/cons.rs:75:39
[INFO] [stderr]    |
[INFO] [stderr] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stderr]    |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_rest`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right`
[INFO] [stderr]   --> type-system/src/ty/cons.rs:75:45
[INFO] [stderr]    |
[INFO] [stderr] 75 |                 OrderedAnd::Row(left, rest, right) => {
[INFO] [stderr]    |                                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left1`
[INFO] [stderr]    --> type-system/src/ty/cons.rs:393:24
[INFO] [stderr]     |
[INFO] [stderr] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stderr]     |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_left1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rest1`
[INFO] [stderr]    --> type-system/src/ty/cons.rs:393:31
[INFO] [stderr]     |
[INFO] [stderr] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stderr]     |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right1`
[INFO] [stderr]    --> type-system/src/ty/cons.rs:393:38
[INFO] [stderr]     |
[INFO] [stderr] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stderr]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left2`
[INFO] [stderr]    --> type-system/src/ty/cons.rs:393:57
[INFO] [stderr]     |
[INFO] [stderr] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stderr]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_left2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rest2`
[INFO] [stderr]    --> type-system/src/ty/cons.rs:393:64
[INFO] [stderr]     |
[INFO] [stderr] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stderr]     |                                                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right2`
[INFO] [stderr]    --> type-system/src/ty/cons.rs:393:71
[INFO] [stderr]     |
[INFO] [stderr] 393 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stderr]     |                                                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right2`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `kind`
[INFO] [stderr]    --> type-system/src/ty.rs:197:8
[INFO] [stderr]     |
[INFO] [stderr] 197 |     fn kind(&self) -> Kind {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `hashmap_mut`
[INFO] [stderr]    --> type-system/src/ty.rs:319:8
[INFO] [stderr]     |
[INFO] [stderr] 319 |     fn hashmap_mut(&mut self) -> &mut HashMap<Var<'a>, Scheme<'a>> {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `remove`
[INFO] [stderr]    --> type-system/src/ty.rs:326:8
[INFO] [stderr]     |
[INFO] [stderr] 326 |     fn remove(&mut self, var: Var<'a>) {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `free_vars`
[INFO] [stderr]    --> type-system/src/ty.rs:329:8
[INFO] [stderr]     |
[INFO] [stderr] 329 |     fn free_vars(&self) -> HashSet<KindedVar<'a>> {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `substitute`
[INFO] [stderr]    --> type-system/src/ty.rs:335:8
[INFO] [stderr]     |
[INFO] [stderr] 335 |     fn substitute(&mut self, subs: &Subs<'a>) -> Result<(), TypeError> {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `generalize`
[INFO] [stderr]    --> type-system/src/ty.rs:341:8
[INFO] [stderr]     |
[INFO] [stderr] 341 |     fn generalize(&self, ty: Type<'a>) -> Scheme<'a> {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `type-system` (lib) generated 17 warnings
[INFO] [stderr] warning: `type-system` (lib test) generated 17 warnings (17 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.93s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/butter-c615ce8d02c84bd4)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hir-b4f5686cee9b1453)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/parser-5dc0ff36aed98a9c)
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/parser-62478c4ec79c868c)
[INFO] [stdout] test expr::float::test::float_1 ... ok
[INFO] [stdout] test expr::float::test::float_2 ... ok
[INFO] [stdout] test expr::float::test::float_3 ... ok
[INFO] [stdout] test expr::float::test::not_float ... ok
[INFO] [stdout] test expr::integer::test::bin ... ok
[INFO] [stdout] test expr::integer::test::hex ... ok
[INFO] [stdout] test expr::integer::test::decimal ... ok
[INFO] [stdout] test expr::integer::test::oct ... ok
[INFO] [stdout] test expr::test::ignore_higher_precedence ... ok
[INFO] [stdout] test expr::string::test::string ... ok
[INFO] [stdout] test expr::test::precedence ... ok
[INFO] [stdout] test ident_keyword::test::non_keyword ... ok
[INFO] [stdout] test ident_keyword::test::non_ident ... ok
[INFO] [stdout] test expr::test::ignore_range ... ok
[INFO] [stdout] test ident_keyword::test::test_keyword ... ok
[INFO] [stdout] test ident_keyword::test::test_ident_or_keyword ... ok
[INFO] [stdout] test expr::test::group ... ok
[INFO] [stdout] test expr::test::right_associative ... ok
[INFO] [stdout] test statement::test::chain_assign ... ok
[INFO] [stdout] test test::insignificant ... ok
[INFO] [stdout] test statement::test::parallel_assign ... ok
[INFO] [stdout] test statement::test::var ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/type_system-5eadf836df6b1501)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hir
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests parser
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests type-system
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f950b8425384d0b5a5327cfcddb5314c8a8820e2b250434b0b319a7dd389f43b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f950b8425384d0b5a5327cfcddb5314c8a8820e2b250434b0b319a7dd389f43b", kill_on_drop: false }`
[INFO] [stdout] f950b8425384d0b5a5327cfcddb5314c8a8820e2b250434b0b319a7dd389f43b