[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] 6dcd1a3564e41ad933fe5f579b7608fc7d956a17
[INFO] checking neverRare/butter against try#4a23c45c7893f1416456144e3883cc48ea91722e for pr-82322
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FneverRare%2Fbutter" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/neverRare/butter on toolchain 4a23c45c7893f1416456144e3883cc48ea91722e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "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-7/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" "+4a23c45c7893f1416456144e3883cc48ea91722e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 058b7bf3d610023a0dc5debf7a0ca63902ebd1f3a7830d9c3f111f69a399b8aa
[INFO] running `Command { std: "docker" "start" "-a" "058b7bf3d610023a0dc5debf7a0ca63902ebd1f3a7830d9c3f111f69a399b8aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "058b7bf3d610023a0dc5debf7a0ca63902ebd1f3a7830d9c3f111f69a399b8aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "058b7bf3d610023a0dc5debf7a0ca63902ebd1f3a7830d9c3f111f69a399b8aa", kill_on_drop: false }`
[INFO] [stdout] 058b7bf3d610023a0dc5debf7a0ca63902ebd1f3a7830d9c3f111f69a399b8aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+4a23c45c7893f1416456144e3883cc48ea91722e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f06919dfa47a6f5dbde3218dfb3a2b7a1fa698c15c178349186d0f11d314a472
[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" "f06919dfa47a6f5dbde3218dfb3a2b7a1fa698c15c178349186d0f11d314a472", kill_on_drop: false }`
[INFO] [stderr]     Checking util v0.1.0 (/opt/rustwide/workdir/util)
[INFO] [stdout] warning: unused variable: `kind`
[INFO] [stdout]   --> util/src/parser.rs:67:36
[INFO] [stdout]    |
[INFO] [stdout] 67 |         fn prefix_parse(&mut self, kind: &Self::Kind) -> Self::Ast {
[INFO] [stdout]    |                                    ^^^^ help: if this is intentional, prefix it with an underscore: `_kind`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `kind`
[INFO] [stdout]   --> util/src/parser.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             kind: &Self::Kind,
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_kind`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `kind`
[INFO] [stdout]    --> util/src/parser.rs:109:49
[INFO] [stdout]     |
[INFO] [stdout] 109 |         fn infix_precedence(infix: &Self::Item, kind: &Self::Kind) -> Option<u32> {
[INFO] [stdout]     |                                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_kind`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking butter_core v0.1.0 (/opt/rustwide/workdir/core)
[INFO] [stdout] warning: unused variable: `parser`
[INFO] [stdout]   --> core/src/parser/block.rs:11:30
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(super) fn block_rest<'a>(parser: &mut Parser<'a>, left_bracket_span: &'a str) -> AstResult<'a> {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parser`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_bracket_span`
[INFO] [stdout]   --> core/src/parser/block.rs:11:55
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(super) fn block_rest<'a>(parser: &mut Parser<'a>, left_bracket_span: &'a str) -> AstResult<'a> {
[INFO] [stdout]    |                                                       ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_bracket_span`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parser`
[INFO] [stdout]   --> core/src/parser/block.rs:11:30
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(super) fn block_rest<'a>(parser: &mut Parser<'a>, left_bracket_span: &'a str) -> AstResult<'a> {
[INFO] [stdout]    |                              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parser`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_bracket_span`
[INFO] [stdout]   --> core/src/parser/block.rs:11:55
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(super) fn block_rest<'a>(parser: &mut Parser<'a>, left_bracket_span: &'a str) -> AstResult<'a> {
[INFO] [stdout]    |                                                       ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_bracket_span`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parser`
[INFO] [stdout]   --> core/src/parser/block.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     parser: &'b mut Parser<'a>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `semicolon`
[INFO] [stdout]   --> core/src/parser/block.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub(super) semicolon: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `resumable`
[INFO] [stdout]   --> core/src/parser/block.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     resumable: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Declare`
[INFO] [stdout]   --> core/src/parser/node_type.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     Declare,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FunDeclare`
[INFO] [stdout]   --> core/src/parser/node_type.rs:72:5
[INFO] [stdout]    |
[INFO] [stdout] 72 |     FunDeclare,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Block`
[INFO] [stdout]   --> core/src/parser/node_type.rs:88:5
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Block,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BlockWithExpr`
[INFO] [stdout]   --> core/src/parser/node_type.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 |     BlockWithExpr,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> core/src/parser.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 |     fn new(src: &'a str) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `parser`
[INFO] [stdout]   --> core/src/parser/block.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     parser: &'b mut Parser<'a>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `semicolon`
[INFO] [stdout]   --> core/src/parser/block.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub(super) semicolon: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `resumable`
[INFO] [stdout]   --> core/src/parser/block.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     resumable: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Declare`
[INFO] [stdout]   --> core/src/parser/node_type.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     Declare,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FunDeclare`
[INFO] [stdout]   --> core/src/parser/node_type.rs:72:5
[INFO] [stdout]    |
[INFO] [stdout] 72 |     FunDeclare,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Block`
[INFO] [stdout]   --> core/src/parser/node_type.rs:88:5
[INFO] [stdout]    |
[INFO] [stdout] 88 |     Block,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BlockWithExpr`
[INFO] [stdout]   --> core/src/parser/node_type.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 |     BlockWithExpr,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> core/src/parser.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 |     fn new(src: &'a str) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.09s
[INFO] running `Command { std: "docker" "inspect" "f06919dfa47a6f5dbde3218dfb3a2b7a1fa698c15c178349186d0f11d314a472", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f06919dfa47a6f5dbde3218dfb3a2b7a1fa698c15c178349186d0f11d314a472", kill_on_drop: false }`
[INFO] [stdout] f06919dfa47a6f5dbde3218dfb3a2b7a1fa698c15c178349186d0f11d314a472