[INFO] cloning repository https://github.com/portal-co/pit-core
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/portal-co/pit-core" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fportal-co%2Fpit-core", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fportal-co%2Fpit-core'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8bcffdc922ac44539012bbf9ae304c4cd16470d7
[INFO] checking portal-co/pit-core against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fportal-co%2Fpit-core" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/portal-co/pit-core
[INFO] finished tweaking git repo https://github.com/portal-co/pit-core
[INFO] tweaked toml for git repo https://github.com/portal-co/pit-core written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/portal-co/pit-core on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/portal-co/pit-core 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 982afe03e8fd57a71afac3d952e6fb7d4e5e32314ddcc2f3a4836a6f054c17dd
[INFO] running `Command { std: "docker" "start" "-a" "982afe03e8fd57a71afac3d952e6fb7d4e5e32314ddcc2f3a4836a6f054c17dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "982afe03e8fd57a71afac3d952e6fb7d4e5e32314ddcc2f3a4836a6f054c17dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "982afe03e8fd57a71afac3d952e6fb7d4e5e32314ddcc2f3a4836a6f054c17dd", kill_on_drop: false }`
[INFO] [stdout] 982afe03e8fd57a71afac3d952e6fb7d4e5e32314ddcc2f3a4836a6f054c17dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9373cc33c4176c2973630bbf2575e98180fe72d4e6bbcdd6ee461967e2ef44a2
[INFO] running `Command { std: "docker" "start" "-a" "9373cc33c4176c2973630bbf2575e98180fe72d4e6bbcdd6ee461967e2ef44a2", kill_on_drop: false }`
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking nom v8.0.0
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling derive_more-impl v2.0.1
[INFO] [stderr]     Checking derive_more v2.0.1
[INFO] [stderr]    Compiling darling_macro v0.20.11
[INFO] [stderr]    Compiling darling v0.20.11
[INFO] [stderr]    Compiling instability v0.3.7
[INFO] [stderr]     Checking pit-core v0.4.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `derive_more::Display`
[INFO] [stdout]   --> src/lib.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use derive_more::Display;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `alpha1` and `is_not`
[INFO] [stdout]   --> src/lib.rs:21:23
[INFO] [stdout]    |
[INFO] [stdout] 21 |     bytes::complete::{is_not, tag, take, take_while_m_n},
[INFO] [stdout]    |                       ^^^^^^
[INFO] [stdout] 22 |     character::complete::{alpha1, char, multispace0, none_of, space0},
[INFO] [stdout]    |                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num`
[INFO] [stdout]  --> src/generics.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{fmt::Formatter, num};
[INFO] [stdout]   |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `number`
[INFO] [stdout]  --> src/generics.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     number,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::_pcode::*`
[INFO] [stdout]   --> src/lib.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub use crate::_pcode::*;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::_generics::*`
[INFO] [stdout]   --> src/lib.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub use crate::_generics::*;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `derive_more::Display`
[INFO] [stdout]   --> src/lib.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use derive_more::Display;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `alpha1` and `is_not`
[INFO] [stdout]   --> src/lib.rs:21:23
[INFO] [stdout]    |
[INFO] [stdout] 21 |     bytes::complete::{is_not, tag, take, take_while_m_n},
[INFO] [stdout]    |                       ^^^^^^
[INFO] [stdout] 22 |     character::complete::{alpha1, char, multispace0, none_of, space0},
[INFO] [stdout]    |                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `num`
[INFO] [stdout]  --> src/generics.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{fmt::Formatter, num};
[INFO] [stdout]   |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `number`
[INFO] [stdout]  --> src/generics.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     number,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::_pcode::*`
[INFO] [stdout]   --> src/lib.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub use crate::_pcode::*;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::_generics::*`
[INFO] [stdout]   --> src/lib.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub use crate::_generics::*;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/lib.rs:391:5
[INFO] [stdout]     |
[INFO] [stdout] 351 | /     match a.strip_prefix("R") {
[INFO] [stdout] 352 | |         Some(b) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 390 | |     }
[INFO] [stdout]     | |_____- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 391 |       todo!()
[INFO] [stdout]     |       ^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `todo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/generics.rs:47:45
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 to_fill: (0..j).filter_map(|a| stack.pop()).collect(),
[INFO] [stdout]    |                                             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/generics.rs:52:41
[INFO] [stdout]    |
[INFO] [stdout] 52 |             to_fill: (0..b).filter_map(|a| stack.pop()).collect(),
[INFO] [stdout]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/lib.rs:391:5
[INFO] [stdout]     |
[INFO] [stdout] 351 | /     match a.strip_prefix("R") {
[INFO] [stdout] 352 | |         Some(b) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 390 | |     }
[INFO] [stdout]     | |_____- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] 391 |       todo!()
[INFO] [stdout]     |       ^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `todo` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/generics.rs:47:45
[INFO] [stdout]    |
[INFO] [stdout] 47 |                 to_fill: (0..j).filter_map(|a| stack.pop()).collect(),
[INFO] [stdout]    |                                             ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/generics.rs:52:41
[INFO] [stdout]    |
[INFO] [stdout] 52 |             to_fill: (0..b).filter_map(|a| stack.pop()).collect(),
[INFO] [stdout]    |                                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ARITY_KEY` is never used
[INFO] [stdout]   --> src/generics.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub const ARITY_KEY: &'static str = "generic_params.modern";
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `GENERIC_KEY` is never used
[INFO] [stdout]   --> src/generics.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const GENERIC_KEY: &'static str = "generics.modern";
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Mangle` is never used
[INFO] [stdout]   --> src/generics.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub trait Mangle {
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Mangled` is never constructed
[INFO] [stdout]   --> src/generics.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Mangled<'a>(pub &'a (dyn Mangle + 'a));
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Param` is never used
[INFO] [stdout]   --> src/generics.rs:69:10
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub enum Param {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PExpr` is never used
[INFO] [stdout]  --> src/pcode.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum PExpr {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pat` is never constructed
[INFO] [stdout]   --> src/pcode.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Pat {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/lib.rs:529:16
[INFO] [stdout]     |
[INFO] [stdout] 529 |         return s.finalize().try_into().unwrap();
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pit-core` (lib) due to 1 previous error; 16 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: constant `ARITY_KEY` is never used
[INFO] [stdout]   --> src/generics.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub const ARITY_KEY: &'static str = "generic_params.modern";
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `GENERIC_KEY` is never used
[INFO] [stdout]   --> src/generics.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const GENERIC_KEY: &'static str = "generics.modern";
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Mangle` is never used
[INFO] [stdout]   --> src/generics.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub trait Mangle {
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Mangled` is never constructed
[INFO] [stdout]   --> src/generics.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct Mangled<'a>(pub &'a (dyn Mangle + 'a));
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Param` is never used
[INFO] [stdout]   --> src/generics.rs:69:10
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub enum Param {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PExpr` is never used
[INFO] [stdout]  --> src/pcode.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum PExpr {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pat` is never constructed
[INFO] [stdout]   --> src/pcode.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Pat {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/lib.rs:529:16
[INFO] [stdout]     |
[INFO] [stdout] 529 |         return s.finalize().try_into().unwrap();
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pit-core` (lib test) due to 1 previous error; 16 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9373cc33c4176c2973630bbf2575e98180fe72d4e6bbcdd6ee461967e2ef44a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9373cc33c4176c2973630bbf2575e98180fe72d4e6bbcdd6ee461967e2ef44a2", kill_on_drop: false }`
[INFO] [stdout] 9373cc33c4176c2973630bbf2575e98180fe72d4e6bbcdd6ee461967e2ef44a2