[INFO] cloning repository https://github.com/skius/imp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skius/imp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskius%2Fimp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskius%2Fimp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d9c23c6192b4bb442f8daebf7a3bd37343913dc
[INFO] checking skius/imp 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%2Fskius%2Fimp" "/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/skius/imp
[INFO] finished tweaking git repo https://github.com/skius/imp
[INFO] tweaked toml for git repo https://github.com/skius/imp written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/skius/imp 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/skius/imp 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-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_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] 099c7513c4f4e3bc457b9420814aeba46d517910aa03ea5ab4a9bfcaae1121a1
[INFO] running `Command { std: "docker" "start" "-a" "099c7513c4f4e3bc457b9420814aeba46d517910aa03ea5ab4a9bfcaae1121a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "099c7513c4f4e3bc457b9420814aeba46d517910aa03ea5ab4a9bfcaae1121a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "099c7513c4f4e3bc457b9420814aeba46d517910aa03ea5ab4a9bfcaae1121a1", kill_on_drop: false }`
[INFO] [stdout] 099c7513c4f4e3bc457b9420814aeba46d517910aa03ea5ab4a9bfcaae1121a1
[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 -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] faa90a57740b98ec213883fb9873807b3694e51855e89b78f33c79d71dcf171d
[INFO] running `Command { std: "docker" "start" "-a" "faa90a57740b98ec213883fb9873807b3694e51855e89b78f33c79d71dcf171d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.104
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling libloading v0.7.1
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling bindgen v0.58.1
[INFO] [stderr]    Compiling siphasher v0.3.7
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling lalrpop-util v0.19.6
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling pico-args v0.4.2
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]     Checking symbolic_expressions v5.0.3
[INFO] [stderr]    Compiling clang-sys v1.2.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
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[INFO] [stderr]     Checking egg v0.6.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling env_logger v0.8.4
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling string_cache v0.8.2
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling ascii-canvas v3.0.0
[INFO] [stderr]    Compiling cexpr v0.4.0
[INFO] [stderr]    Compiling lalrpop v0.19.6
[INFO] [stderr]    Compiling z3-sys v0.7.1
[INFO] [stderr]    Compiling imp v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking z3 v0.11.2
[INFO] [stdout] warning: unused import: `AxStm`
[INFO] [stdout]  --> src/lib.rs:4:33
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::ast::{Aexp, AxBlock, AxStm, Bexp, ImpFuncDef, Opcode, Ropcode, Stm};
[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: `error::ImpErrorInner`
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use error::ImpErrorInner;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error::ImpErrorInner::*`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use error::ImpErrorInner::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `AxStm`
[INFO] [stdout]  --> src/lib.rs:4:33
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::ast::{Aexp, AxBlock, AxStm, Bexp, ImpFuncDef, Opcode, Ropcode, Stm};
[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: `error::ImpErrorInner`
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use error::ImpErrorInner;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `error::ImpErrorInner::*`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use error::ImpErrorInner::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hint::unreachable_unchecked`
[INFO] [stdout]  --> src/ast.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hint::unreachable_unchecked;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Dynamic` and `Int`
[INFO] [stdout]  --> src/ast.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | use z3::ast::{Ast, Dynamic, Int};
[INFO] [stdout]   |                    ^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/ast.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::state::*`
[INFO] [stdout]  --> src/axiomatic.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::state::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FuncDecl`
[INFO] [stdout]  --> src/axiomatic.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use z3::{SatResult, FuncDecl, RecFuncDecl, Model};
[INFO] [stdout]   |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `forall_const`
[INFO] [stdout]  --> src/axiomatic.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use z3::ast::{forall_const, Ast};
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]   --> src/axiomatic.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::convert::TryInto;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hint::unreachable_unchecked`
[INFO] [stdout]  --> src/ast.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hint::unreachable_unchecked;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Dynamic` and `Int`
[INFO] [stdout]  --> src/ast.rs:3:20
[INFO] [stdout]   |
[INFO] [stdout] 3 | use z3::ast::{Ast, Dynamic, Int};
[INFO] [stdout]   |                    ^^^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/ast.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::state::*`
[INFO] [stdout]  --> src/axiomatic.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::state::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FuncDecl`
[INFO] [stdout]  --> src/axiomatic.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | use z3::{SatResult, FuncDecl, RecFuncDecl, Model};
[INFO] [stdout]   |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `forall_const`
[INFO] [stdout]  --> src/axiomatic.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use z3::ast::{forall_const, Ast};
[INFO] [stdout]   |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]   --> src/axiomatic.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::convert::TryInto;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ast`
[INFO] [stdout]  --> src/axiomatic.rs:9:29
[INFO] [stdout]   |
[INFO] [stdout] 9 | use z3::ast::{forall_const, Ast};
[INFO] [stdout]   |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ast`
[INFO] [stdout]  --> src/axiomatic.rs:9:29
[INFO] [stdout]   |
[INFO] [stdout] 9 | use z3::ast::{forall_const, Ast};
[INFO] [stdout]   |                             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cond`
[INFO] [stdout]   --> src/ast.rs:97:26
[INFO] [stdout]    |
[INFO] [stdout] 97 |             AxStm::While(cond, AxBlock(AssertionChain(inner_pre_chain), inner_rem)) => {
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_cond`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inner_post`
[INFO] [stdout]   --> src/ast.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 let inner_post = inner_rem.last().unwrap().1.0.last().unwrap();
[INFO] [stdout]    |                     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_inner_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cond`
[INFO] [stdout]   --> src/ast.rs:97:26
[INFO] [stdout]    |
[INFO] [stdout] 97 |             AxStm::While(cond, AxBlock(AssertionChain(inner_pre_chain), inner_rem)) => {
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_cond`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inner_post`
[INFO] [stdout]   --> src/ast.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |                 let inner_post = inner_rem.last().unwrap().1.0.last().unwrap();
[INFO] [stdout]    |                     ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_inner_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ast.rs:467:13
[INFO] [stdout]     |
[INFO] [stdout] 467 |         let mut f = funcmap.get(&self.name).unwrap();
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ast.rs:467:13
[INFO] [stdout]     |
[INFO] [stdout] 467 |         let mut f = funcmap.get(&self.name).unwrap();
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/axiomatic.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     for (name, f) in &funcmap {
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/axiomatic.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     for (name, f) in &funcmap {
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inner_pre_chain`
[INFO] [stdout]    --> src/axiomatic.rs:248:55
[INFO] [stdout]     |
[INFO] [stdout] 248 |             AxStm::While(cond, AxBlock(AssertionChain(inner_pre_chain), inner_rem)) => {
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_inner_pre_chain`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inner_pre_chain`
[INFO] [stdout]    --> src/axiomatic.rs:248:55
[INFO] [stdout]     |
[INFO] [stdout] 248 |             AxStm::While(cond, AxBlock(AssertionChain(inner_pre_chain), inner_rem)) => {
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_inner_pre_chain`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/axiomatic.rs:505:9
[INFO] [stdout]     |
[INFO] [stdout] 505 |     let mut solver = z3::Solver::new(&ctx);
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/axiomatic.rs:505:9
[INFO] [stdout]     |
[INFO] [stdout] 505 |     let mut solver = z3::Solver::new(&ctx);
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_expr`
[INFO] [stdout]    --> src/entailment.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     let my_expr: RecExpr<ImpExpr> = "(^ 2 (+ z 1))".parse().unwrap();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_expr`
[INFO] [stdout]    --> src/entailment.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let my_expr: RecExpr<ImpExpr> = "(* (^ 2 z) (^ 2 1))".parse().unwrap();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `untrue_model`
[INFO] [stdout]   --> src/error.rs:82:96
[INFO] [stdout]    |
[INFO] [stdout] 82 |             ImpErrorInner::EntailmentError { entailment_src, entailment_dst, is_unknown: true, untrue_model } => {
[INFO] [stdout]    |                                                                                                ^^^^^^^^^^^^ help: try ignoring the field: `untrue_model: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_expr`
[INFO] [stdout]    --> src/entailment.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 |     let my_expr: RecExpr<ImpExpr> = "(^ 2 (+ z 1))".parse().unwrap();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_expr`
[INFO] [stdout]    --> src/entailment.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let my_expr: RecExpr<ImpExpr> = "(* (^ 2 z) (^ 2 1))".parse().unwrap();
[INFO] [stdout]     |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `untrue_model`
[INFO] [stdout]   --> src/error.rs:82:96
[INFO] [stdout]    |
[INFO] [stdout] 82 |             ImpErrorInner::EntailmentError { entailment_src, entailment_dst, is_unknown: true, untrue_model } => {
[INFO] [stdout]    |                                                                                                ^^^^^^^^^^^^ help: try ignoring the field: `untrue_model: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/ast.rs:105:112
[INFO] [stdout]     |
[INFO] [stdout] 105 | ...equires an inner pre-condition of the form { condition and ( P ) and variant = LOGICAL_VAR}"),
[INFO] [stdout]     |                                               ^                                              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 105 |                             _ => panic!("{}", "A total correctness proof requires an inner pre-condition of the form { condition and ( P ) and variant = LOGICAL_VAR}"),
[INFO] [stdout]     |                                         +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/ast.rs:108:104
[INFO] [stdout]     |
[INFO] [stdout] 108 | ...equires an inner pre-condition of the form { condition and ( P ) and variant = LOGICAL_VAR}"),
[INFO] [stdout]     |                                               ^                                              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 108 |                     _ => panic!("{}", "A total correctness proof requires an inner pre-condition of the form { condition and ( P ) and variant = LOGICAL_VAR}"),
[INFO] [stdout]     |                                 +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<egg::Symbol, Infallible>
[INFO] [stdout]   --> src/entailment.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | / define_language! {
[INFO] [stdout]  4 | |     pub enum ImpExpr {
[INFO] [stdout]  5 | |         "+" = Add([Id; 2]),
[INFO] [stdout]  6 | |         "-" = Sub([Id; 2]),
[INFO] [stdout] ...  |
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<egg::Symbol, Infallible>
[INFO] [stdout]   --> src/entailment.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | / define_language! {
[INFO] [stdout]  4 | |     pub enum ImpExpr {
[INFO] [stdout]  5 | |         "+" = Add([Id; 2]),
[INFO] [stdout]  6 | |         "-" = Sub([Id; 2]),
[INFO] [stdout] ...  |
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/ast.rs:105:112
[INFO] [stdout]     |
[INFO] [stdout] 105 | ...equires an inner pre-condition of the form { condition and ( P ) and variant = LOGICAL_VAR}"),
[INFO] [stdout]     |                                               ^                                              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 105 |                             _ => panic!("{}", "A total correctness proof requires an inner pre-condition of the form { condition and ( P ) and variant = LOGICAL_VAR}"),
[INFO] [stdout]     |                                         +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains braces
[INFO] [stdout]    --> src/ast.rs:108:104
[INFO] [stdout]     |
[INFO] [stdout] 108 | ...equires an inner pre-condition of the form { condition and ( P ) and variant = LOGICAL_VAR}"),
[INFO] [stdout]     |                                               ^                                              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this message is not used as a format string, but will be in Rust 2021
[INFO] [stdout] help: add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 108 |                     _ => panic!("{}", "A total correctness proof requires an inner pre-condition of the form { condition and ( P ) and variant = LOGICAL_VAR}"),
[INFO] [stdout]     |                                 +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<egg::Symbol, Infallible>
[INFO] [stdout]   --> src/entailment.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | / define_language! {
[INFO] [stdout]  4 | |     pub enum ImpExpr {
[INFO] [stdout]  5 | |         "+" = Add([Id; 2]),
[INFO] [stdout]  6 | |         "-" = Sub([Id; 2]),
[INFO] [stdout] ...  |
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<egg::Symbol, Infallible>
[INFO] [stdout]   --> src/entailment.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | / define_language! {
[INFO] [stdout]  4 | |     pub enum ImpExpr {
[INFO] [stdout]  5 | |         "+" = Add([Id; 2]),
[INFO] [stdout]  6 | |         "-" = Sub([Id; 2]),
[INFO] [stdout] ...  |
[INFO] [stdout] 24 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `$crate::__define_language` which comes from the expansion of the macro `define_language` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `imp` (lib test) due to 2 previous errors; 22 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `imp` (lib) due to 2 previous errors; 22 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "faa90a57740b98ec213883fb9873807b3694e51855e89b78f33c79d71dcf171d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faa90a57740b98ec213883fb9873807b3694e51855e89b78f33c79d71dcf171d", kill_on_drop: false }`
[INFO] [stdout] faa90a57740b98ec213883fb9873807b3694e51855e89b78f33c79d71dcf171d
