[INFO] cloning repository https://github.com/heng-zhong-2003/meerkat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/heng-zhong-2003/meerkat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheng-zhong-2003%2Fmeerkat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheng-zhong-2003%2Fmeerkat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7b7ff1542f7b25485273fc984a717752d0827b1
[INFO] checking heng-zhong-2003/meerkat against try#3857be5045fe74bd0f296f6f4c23db10f8857f73 for pr-156807
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fheng-zhong-2003%2Fmeerkat" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/heng-zhong-2003/meerkat
[INFO] finished tweaking git repo https://github.com/heng-zhong-2003/meerkat
[INFO] tweaked toml for git repo https://github.com/heng-zhong-2003/meerkat written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/heng-zhong-2003/meerkat on toolchain 3857be5045fe74bd0f296f6f4c23db10f8857f73
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/heng-zhong-2003/meerkat 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" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "725cb8169bc0600bda4cedbb6df2cc95a0745355cee51e93c7691f6922ae6e23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "725cb8169bc0600bda4cedbb6df2cc95a0745355cee51e93c7691f6922ae6e23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "725cb8169bc0600bda4cedbb6df2cc95a0745355cee51e93c7691f6922ae6e23", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3857be5045fe74bd0f296f6f4c23db10f8857f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `inline_colorization::*`
[INFO] [stdout]  --> src/backend/srvmanager_proc.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use inline_colorization::*;
[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 import: `crate::backend::srvmanager_proc`
[INFO] [stdout]  --> src/backend/varworker_proc.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::backend::srvmanager_proc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::mpsc`
[INFO] [stdout]  --> src/backend/varworker_proc.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio::sync::mpsc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> src/frontend/meerast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `inline_colorization::*`
[INFO] [stdout]  --> src/backend/srvmanager_proc.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use inline_colorization::*;
[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 import: `crate::backend::srvmanager_proc`
[INFO] [stdout]  --> src/backend/varworker_proc.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::backend::srvmanager_proc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::mpsc`
[INFO] [stdout]  --> src/backend/varworker_proc.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio::sync::mpsc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> src/frontend/meerast.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `backend::worker::Worker`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use backend::worker::Worker;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `frontend::parse`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use frontend::parse;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `frontend::typecheck`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use frontend::typecheck;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `inline_colorization::*`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use inline_colorization::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]   --> src/main.rs:11:24
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]    |                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::io::Write;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::sync::Arc;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `env` and `fs`
[INFO] [stdout]   --> src/main.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::{env, fs};
[INFO] [stdout]    |           ^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::io`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use tokio::io;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tracing_subscriber::fmt::MakeWriter`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use tracing_subscriber::fmt::MakeWriter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `backend::worker::Worker`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use backend::worker::Worker;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `frontend::parse`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use frontend::parse;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `frontend::typecheck`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use frontend::typecheck;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `inline_colorization::*`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use inline_colorization::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashMap`
[INFO] [stdout]   --> src/main.rs:11:24
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]    |                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::io::Write;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::sync::Arc;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `env` and `fs`
[INFO] [stdout]   --> src/main.rs:14:11
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::{env, fs};
[INFO] [stdout]    |           ^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::io`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use tokio::io;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tracing_subscriber::fmt::MakeWriter`
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use tracing_subscriber::fmt::MakeWriter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `worker_name`
[INFO] [stdout]    --> src/backend/srvmanager_proc.rs:154:17
[INFO] [stdout]     |
[INFO] [stdout] 154 |                 worker_name,
[INFO] [stdout]     |                 ^^^^^^^^^^^ help: try ignoring the field: `worker_name: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bop`
[INFO] [stdout]    --> src/backend/worker.rs:330:54
[INFO] [stdout]     |
[INFO] [stdout] 330 |                 meerast::Expr::BopExpr { opd1, opd2, bop } => {
[INFO] [stdout]     |                                                      ^^^ help: try ignoring the field: `bop: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uop`
[INFO] [stdout]    --> src/backend/worker.rs:334:47
[INFO] [stdout]     |
[INFO] [stdout] 334 |                 meerast::Expr::UopExpr { opd, uop } => {
[INFO] [stdout]     |                                               ^^^ help: try ignoring the field: `uop: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `worker_name`
[INFO] [stdout]    --> src/backend/srvmanager_proc.rs:154:17
[INFO] [stdout]     |
[INFO] [stdout] 154 |                 worker_name,
[INFO] [stdout]     |                 ^^^^^^^^^^^ help: try ignoring the field: `worker_name: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bop`
[INFO] [stdout]    --> src/backend/worker.rs:330:54
[INFO] [stdout]     |
[INFO] [stdout] 330 |                 meerast::Expr::BopExpr { opd1, opd2, bop } => {
[INFO] [stdout]     |                                                      ^^^ help: try ignoring the field: `bop: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uop`
[INFO] [stdout]    --> src/backend/worker.rs:334:47
[INFO] [stdout]     |
[INFO] [stdout] 334 |                 meerast::Expr::UopExpr { opd, uop } => {
[INFO] [stdout]     |                                               ^^^ help: try ignoring the field: `uop: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/frontend/typecheck.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 165 |         _ => panic!(),
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/frontend/typecheck.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 116 |           Type::Int | Type::Bool | Type::Unit | Type::Action => ty.clone(),
[INFO] [stdout]     |           -------------------------------------------------- matches some of the same values
[INFO] [stdout] 117 |           Type::Tyvar { name: alpha } => match tyvar_to_type.get(alpha) {
[INFO] [stdout]     |           --------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 121 | /         Type::Fun {
[INFO] [stdout] 122 | |             par_types: pars,
[INFO] [stdout] 123 | |             ret_type: ret,
[INFO] [stdout] 124 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 135 | /         Type::Poly {
[INFO] [stdout] 136 | |             tyvars: poly_pars,
[INFO] [stdout] 137 | |             poly_type: u,
[INFO] [stdout] 138 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 165 |           _ => panic!(),
[INFO] [stdout]     |           ^ ...and 1 other patterns collectively make this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/frontend/typecheck.rs:194:9
[INFO] [stdout]     |
[INFO] [stdout] 194 |         _ => panic!(),
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/frontend/typecheck.rs:194:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |           Type::Int | Type::Bool | Type::Unit | Type::Action | Type::Tyvar { name: _ } => {}
[INFO] [stdout]     |           ---------------------------------------------------------------------------- matches some of the same values
[INFO] [stdout] 173 | /         Type::Fun {
[INFO] [stdout] 174 | |             par_types,
[INFO] [stdout] 175 | |             ret_type,
[INFO] [stdout] 176 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 184 |           Type::Meta { name } => {
[INFO] [stdout]     |           ------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 187 | /         Type::Poly {
[INFO] [stdout] 188 | |             tyvars: _,
[INFO] [stdout] 189 | |             poly_type,
[INFO] [stdout] 190 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 194 |           _ => panic!(),
[INFO] [stdout]     |           ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/frontend/typecheck.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |         _ => panic!(),
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/frontend/typecheck.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |           Type::Int | Type::Bool | Type::Unit | Type::Action | Type::Tyvar { name: _ } => {}
[INFO] [stdout]     |           ---------------------------------------------------------------------------- matches some of the same values
[INFO] [stdout] 215 | /         Type::Fun {
[INFO] [stdout] 216 | |             par_types,
[INFO] [stdout] 217 | |             ret_type,
[INFO] [stdout] 218 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 226 |           Type::Meta { name } => {
[INFO] [stdout]     |           ------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 235 | /         Type::Poly {
[INFO] [stdout] 236 | |             tyvars: _,
[INFO] [stdout] 237 | |             poly_type,
[INFO] [stdout] 238 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 242 |           _ => panic!(),
[INFO] [stdout]     |           ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `AstNode` is never used
[INFO] [stdout]  --> src/frontend/meerast.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait AstNode {}
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&Expr` instead of dereferencing the inner type
[INFO] [stdout]    --> src/backend/worker.rs:300:45
[INFO] [stdout]     |
[INFO] [stdout] 300 |                         Some(e) => *expr = e.deref().clone(),
[INFO] [stdout]     |                                             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&Expr` instead of dereferencing the inner type
[INFO] [stdout]    --> src/backend/worker.rs:354:68
[INFO] [stdout]     |
[INFO] [stdout] 354 | ...                   body_map.insert(ident.clone(), arg_expr.deref());
[INFO] [stdout]     |                                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/frontend/typecheck.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 165 |         _ => panic!(),
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/frontend/typecheck.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 116 |           Type::Int | Type::Bool | Type::Unit | Type::Action => ty.clone(),
[INFO] [stdout]     |           -------------------------------------------------- matches some of the same values
[INFO] [stdout] 117 |           Type::Tyvar { name: alpha } => match tyvar_to_type.get(alpha) {
[INFO] [stdout]     |           --------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 121 | /         Type::Fun {
[INFO] [stdout] 122 | |             par_types: pars,
[INFO] [stdout] 123 | |             ret_type: ret,
[INFO] [stdout] 124 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 135 | /         Type::Poly {
[INFO] [stdout] 136 | |             tyvars: poly_pars,
[INFO] [stdout] 137 | |             poly_type: u,
[INFO] [stdout] 138 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 165 |           _ => panic!(),
[INFO] [stdout]     |           ^ ...and 1 other patterns collectively make this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/frontend/typecheck.rs:194:9
[INFO] [stdout]     |
[INFO] [stdout] 194 |         _ => panic!(),
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/frontend/typecheck.rs:194:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |           Type::Int | Type::Bool | Type::Unit | Type::Action | Type::Tyvar { name: _ } => {}
[INFO] [stdout]     |           ---------------------------------------------------------------------------- matches some of the same values
[INFO] [stdout] 173 | /         Type::Fun {
[INFO] [stdout] 174 | |             par_types,
[INFO] [stdout] 175 | |             ret_type,
[INFO] [stdout] 176 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 184 |           Type::Meta { name } => {
[INFO] [stdout]     |           ------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 187 | /         Type::Poly {
[INFO] [stdout] 188 | |             tyvars: _,
[INFO] [stdout] 189 | |             poly_type,
[INFO] [stdout] 190 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 194 |           _ => panic!(),
[INFO] [stdout]     |           ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/frontend/typecheck.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |         _ => panic!(),
[INFO] [stdout]     |         ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/frontend/typecheck.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 214 |           Type::Int | Type::Bool | Type::Unit | Type::Action | Type::Tyvar { name: _ } => {}
[INFO] [stdout]     |           ---------------------------------------------------------------------------- matches some of the same values
[INFO] [stdout] 215 | /         Type::Fun {
[INFO] [stdout] 216 | |             par_types,
[INFO] [stdout] 217 | |             ret_type,
[INFO] [stdout] 218 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 226 |           Type::Meta { name } => {
[INFO] [stdout]     |           ------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 235 | /         Type::Poly {
[INFO] [stdout] 236 | |             tyvars: _,
[INFO] [stdout] 237 | |             poly_type,
[INFO] [stdout] 238 | |         } => {
[INFO] [stdout]     | |_________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 242 |           _ => panic!(),
[INFO] [stdout]     |           ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `AstNode` is never used
[INFO] [stdout]  --> src/frontend/meerast.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait AstNode {}
[INFO] [stdout]   |       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&Expr` instead of dereferencing the inner type
[INFO] [stdout]    --> src/backend/worker.rs:300:45
[INFO] [stdout]     |
[INFO] [stdout] 300 |                         Some(e) => *expr = e.deref().clone(),
[INFO] [stdout]     |                                             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&Expr` instead of dereferencing the inner type
[INFO] [stdout]    --> src/backend/worker.rs:354:68
[INFO] [stdout]     |
[INFO] [stdout] 354 | ...                   body_map.insert(ident.clone(), arg_expr.deref());
[INFO] [stdout]     |                                                              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.65s
[INFO] running `Command { std: "docker" "inspect" "e3ed9def5bf3d1fe8bfe8da4191c4bf314901cc405f01661d83482405d88446c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3ed9def5bf3d1fe8bfe8da4191c4bf314901cc405f01661d83482405d88446c", kill_on_drop: false }`
[INFO] [stdout] e3ed9def5bf3d1fe8bfe8da4191c4bf314901cc405f01661d83482405d88446c
