[INFO] cloning repository https://github.com/ISickMan/algebrars
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ISickMan/algebrars" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FISickMan%2Falgebrars", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FISickMan%2Falgebrars'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab2576f752d3a5e3b2997778f3850d286a63a1d0
[INFO] building ISickMan/algebrars against try#334963c956d25708feab489a3816ae63f639355d for pr-135216
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FISickMan%2Falgebrars" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ISickMan/algebrars on toolchain 334963c956d25708feab489a3816ae63f639355d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/ISickMan/algebrars
[INFO] finished tweaking git repo https://github.com/ISickMan/algebrars
[INFO] tweaked toml for git repo https://github.com/ISickMan/algebrars written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ISickMan/algebrars 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" "+334963c956d25708feab489a3816ae63f639355d" "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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb8549aae24f010c3d91e533b9aff460580436962df1ec0d1062238134b9a2d6
[INFO] running `Command { std: "docker" "start" "-a" "fb8549aae24f010c3d91e533b9aff460580436962df1ec0d1062238134b9a2d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb8549aae24f010c3d91e533b9aff460580436962df1ec0d1062238134b9a2d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb8549aae24f010c3d91e533b9aff460580436962df1ec0d1062238134b9a2d6", kill_on_drop: false }`
[INFO] [stdout] fb8549aae24f010c3d91e533b9aff460580436962df1ec0d1062238134b9a2d6
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a22a151c1adf79c831eb46466a74c36c6e41190577687e82a3908b17514a12e
[INFO] running `Command { std: "docker" "start" "-a" "7a22a151c1adf79c831eb46466a74c36c6e41190577687e82a3908b17514a12e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.82
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling serde v1.0.201
[INFO] [stderr]    Compiling rust_decimal v1.35.0
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]    Compiling rust_decimal v1.35.0 (https://github.com/ChristianIvicevic/rust-decimal?branch=wasm#30b90613)
[INFO] [stderr]    Compiling arrayvec v0.7.4
[INFO] [stderr]    Compiling diff v0.1.13
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling yansi v0.5.1
[INFO] [stderr]    Compiling either v1.11.0
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling itertools v0.12.1
[INFO] [stderr]    Compiling pretty_assertions v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.61
[INFO] [stderr]    Compiling rust_decimal_macros v1.34.2
[INFO] [stderr]    Compiling serde_derive v1.0.201
[INFO] [stderr]    Compiling algebrars v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops::RangeBounds`
[INFO] [stdout]  --> src/arithmatic/arithmatic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::RangeBounds;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MathTree`, `Step`, and `factorization`
[INFO] [stdout]  --> src/arithmatic/arithmatic.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |     bounds::Bound, factorization, math_tree::{MathTree, TreeNodeRef, VarBounds}, stepper::{Step, Steps}, MathToken, OperationToken
[INFO] [stdout]   |                    ^^^^^^^^^^^^^              ^^^^^^^^                                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TreePos`
[INFO] [stdout]  --> src/equations.rs:6:52
[INFO] [stdout]   |
[INFO] [stdout] 6 |     math_tree::{MathTree, ParseError, TreeNodeRef, TreePos},
[INFO] [stdout]   |                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeMap` and `HashMap`
[INFO] [stdout]  --> src/factorization.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{BTreeMap, BTreeSet, HashMap};
[INFO] [stdout]   |                        ^^^^^^^^            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TreeNode`
[INFO] [stdout]  --> src/factorization.rs:9:27
[INFO] [stdout]   |
[INFO] [stdout] 9 |     math_tree::{MathTree, TreeNode, TreeNodeRef},
[INFO] [stdout]   |                           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lexer::Lexer`
[INFO] [stdout]  --> src/function/fast_function.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     lexer::Lexer,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/latex.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `f32::consts::E`
[INFO] [stdout]  --> src/math_tree.rs:1:48
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::RefCell, collections::HashMap, f32::consts::E, ops::Index, rc::Rc};
[INFO] [stdout]   |                                                ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `OperandsIt`
[INFO] [stdout]   --> src/math_tree.rs:13:38
[INFO] [stdout]    |
[INFO] [stdout] 13 |     operands::{OperandPos, Operands, OperandsIt},
[INFO] [stdout]    |                                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/operands.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:118:34
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn iter<'a>(&'a self) -> OperandsIt {
[INFO] [stdout]     |                 --               ^^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 lifetime `'a` declared here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:124:38
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn iter_mul<'a>(&'a self) -> OperandsIt {
[INFO] [stdout]     |                     --               ^^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     lifetime `'a` declared here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:133:19
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn iter_order<'a>(
[INFO] [stdout]     |                       -- lifetime `'a` declared here
[INFO] [stdout] ...
[INFO] [stdout] 133 |         slab::Iter<(TreeNodeRef, usize)>,
[INFO] [stdout]     |                   ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:173:55
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn get_kind<'a>(&'a self, kind: MathTokenType) -> OperandIt {
[INFO] [stdout]     |                 -- lifetime `'a` declared here        ^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:183:39
[INFO] [stdout]     |
[INFO] [stdout] 183 |     pub fn constants<'a>(&'a self) -> OperandIt {
[INFO] [stdout]     |                      --               ^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      lifetime `'a` declared here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:187:39
[INFO] [stdout]     |
[INFO] [stdout] 187 |     pub fn operators<'a>(&'a self) -> OperandIt {
[INFO] [stdout]     |                      --               ^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      lifetime `'a` declared here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:191:39
[INFO] [stdout]     |
[INFO] [stdout] 191 |     pub fn variables<'a>(&'a self) -> OperandIt {
[INFO] [stdout]     |                      --               ^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      lifetime `'a` declared here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/simplify/simplify.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `constants::CONSTANTS_MAP`
[INFO] [stdout]  --> src/simplify/simplify.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     constants::CONSTANTS_MAP,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MathTokenType`, `OperationToken`, and `factorization`
[INFO] [stdout]  --> src/simplify/symmetry.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     factorization,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 7 |     MathTokenType, OperationToken,
[INFO] [stdout]   |     ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/equations.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 132 | /             return EquationSolution::SolutionsFor(
[INFO] [stdout] 133 | |                 self.left.root.clone(),
[INFO] [stdout] 134 | |                 vec![self.right.root.clone()],
[INFO] [stdout] 135 | |             );
[INFO] [stdout]     | |_____________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 141 |           EquationSolution::NoSolution
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `steps`
[INFO] [stdout]   --> src/arithmatic/arithmatic.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     steps: &mut Steps,
[INFO] [stdout]    |     ^^^^^ help: if this is intentional, prefix it with an underscore: `_steps`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/arithmatic/arithmatic.rs:201:14
[INFO] [stdout]     |
[INFO] [stdout] 201 |             |a: &TreeNodeRef, b, desc, bounds| {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_variables`
[INFO] [stdout]   --> src/equations.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let left_variables = Function::scan_variables(&self.left.root);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_variables`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_variables`
[INFO] [stdout]   --> src/equations.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let right_variables = Function::scan_variables(&self.right.root);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_variables`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/factorization.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let mut multipliers =  node.borrow().calculate_iter().map(|x| x.1.clone()).collect_vec();
[INFO] [stdout]    |             ----^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/factorization.rs:124:36
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn find_common_factor_constant(mut constants: BTreeSet<Decimal>) -> Option<Decimal> {
[INFO] [stdout]     |                                    ----^^^^^^^^^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `state`
[INFO] [stdout]   --> src/math_tree.rs:34:42
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
[INFO] [stdout]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `skip` is assigned to, but never used
[INFO] [stdout]   --> src/simplify/simplify.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut skip = 0;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_skip` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `skip` is never read
[INFO] [stdout]   --> src/simplify/simplify.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     skip -= 1;
[INFO] [stdout]    |                     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EquationStep` is never constructed
[INFO] [stdout]   --> src/equations.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct EquationStep(OperationToken, TreeNodeRef);
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `find_common_denominator_constant` is never used
[INFO] [stdout]    --> src/factorization.rs:157:8
[INFO] [stdout]     |
[INFO] [stdout] 13  | impl MathTree {
[INFO] [stdout]     | ------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 157 |     fn find_common_denominator_constant(mut constants: BTreeSet<Decimal>) -> Decimal {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]   --> src/geometry/types.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Segment {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 20 |     a: Point,
[INFO] [stdout]    |     ^
[INFO] [stdout] 21 |     b: Point,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `parse` is never used
[INFO] [stdout]    --> src/math_tree.rs:112:19
[INFO] [stdout]     |
[INFO] [stdout] 111 | impl TreeNodeRef {
[INFO] [stdout]     | ---------------- associated function in this implementation
[INFO] [stdout] 112 |     pub(crate) fn parse(str: &str) -> Self {
[INFO] [stdout]     |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NodePos` is never used
[INFO] [stdout]  --> src/stepper.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | type NodePos = Vec<usize>;
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/equations.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |             self.left.simplify(&mut steps);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 120 |             let _ = self.left.simplify(&mut steps);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/equations.rs:121:13
[INFO] [stdout]     |
[INFO] [stdout] 121 |             self.right.simplify(&mut steps);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 121 |             let _ = self.right.simplify(&mut steps);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.01s
[INFO] running `Command { std: "docker" "inspect" "7a22a151c1adf79c831eb46466a74c36c6e41190577687e82a3908b17514a12e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a22a151c1adf79c831eb46466a74c36c6e41190577687e82a3908b17514a12e", kill_on_drop: false }`
[INFO] [stdout] 7a22a151c1adf79c831eb46466a74c36c6e41190577687e82a3908b17514a12e
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+334963c956d25708feab489a3816ae63f639355d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b056871b73560a1d5a733423872e1da751e8732261e71f893121775a2253153
[INFO] running `Command { std: "docker" "start" "-a" "5b056871b73560a1d5a733423872e1da751e8732261e71f893121775a2253153", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling libc v0.2.154
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling clap_lex v0.7.0
[INFO] [stderr]    Compiling anstyle v1.0.7
[INFO] [stderr]    Compiling ciborium-io v0.2.2
[INFO] [stderr]    Compiling half v2.4.1
[INFO] [stderr]    Compiling regex-syntax v0.8.3
[INFO] [stderr]    Compiling plotters-backend v0.3.5
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling cast v0.3.0
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling anes v0.1.6
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling ciborium-ll v0.2.2
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling plotters-svg v0.3.5
[INFO] [stderr]    Compiling ciborium v0.2.2
[INFO] [stderr]    Compiling clap_builder v4.5.2
[INFO] [stderr]    Compiling plotters v0.3.5
[INFO] [stderr]    Compiling rust_decimal v1.35.0 (https://github.com/ChristianIvicevic/rust-decimal?branch=wasm#30b90613)
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling rust_decimal v1.35.0
[INFO] [stderr]    Compiling is-terminal v0.4.12
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling criterion-plot v0.5.0
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]    Compiling rust_decimal_macros v1.34.2
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling clap v4.5.4
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling criterion v0.5.1
[INFO] [stderr]    Compiling algebrars v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops::RangeBounds`
[INFO] [stdout]  --> src/arithmatic/arithmatic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::RangeBounds;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MathTree`, `Step`, and `factorization`
[INFO] [stdout]  --> src/arithmatic/arithmatic.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |     bounds::Bound, factorization, math_tree::{MathTree, TreeNodeRef, VarBounds}, stepper::{Step, Steps}, MathToken, OperationToken
[INFO] [stdout]   |                    ^^^^^^^^^^^^^              ^^^^^^^^                                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TreePos`
[INFO] [stdout]  --> src/equations.rs:6:52
[INFO] [stdout]   |
[INFO] [stdout] 6 |     math_tree::{MathTree, ParseError, TreeNodeRef, TreePos},
[INFO] [stdout]   |                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeMap` and `HashMap`
[INFO] [stdout]  --> src/factorization.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{BTreeMap, BTreeSet, HashMap};
[INFO] [stdout]   |                        ^^^^^^^^            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TreeNode`
[INFO] [stdout]  --> src/factorization.rs:9:27
[INFO] [stdout]   |
[INFO] [stdout] 9 |     math_tree::{MathTree, TreeNode, TreeNodeRef},
[INFO] [stdout]   |                           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MathToken`
[INFO] [stdout]    --> src/factorization.rs:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |         MathToken,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lexer::Lexer`
[INFO] [stdout]  --> src/function/fast_function.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     lexer::Lexer,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/latex.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `f32::consts::E`
[INFO] [stdout]  --> src/math_tree.rs:1:48
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{cell::RefCell, collections::HashMap, f32::consts::E, ops::Index, rc::Rc};
[INFO] [stdout]   |                                                ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `OperandsIt`
[INFO] [stdout]   --> src/math_tree.rs:13:38
[INFO] [stdout]    |
[INFO] [stdout] 13 |     operands::{OperandPos, Operands, OperandsIt},
[INFO] [stdout]    |                                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]  --> src/operands.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use itertools::Itertools;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:118:34
[INFO] [stdout]     |
[INFO] [stdout] 118 |     pub fn iter<'a>(&'a self) -> OperandsIt {
[INFO] [stdout]     |                 --               ^^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 lifetime `'a` declared here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:124:38
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn iter_mul<'a>(&'a self) -> OperandsIt {
[INFO] [stdout]     |                     --               ^^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     lifetime `'a` declared here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:133:19
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn iter_order<'a>(
[INFO] [stdout]     |                       -- lifetime `'a` declared here
[INFO] [stdout] ...
[INFO] [stdout] 133 |         slab::Iter<(TreeNodeRef, usize)>,
[INFO] [stdout]     |                   ^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:173:55
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn get_kind<'a>(&'a self, kind: MathTokenType) -> OperandIt {
[INFO] [stdout]     |                 -- lifetime `'a` declared here        ^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:183:39
[INFO] [stdout]     |
[INFO] [stdout] 183 |     pub fn constants<'a>(&'a self) -> OperandIt {
[INFO] [stdout]     |                      --               ^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      lifetime `'a` declared here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:187:39
[INFO] [stdout]     |
[INFO] [stdout] 187 |     pub fn operators<'a>(&'a self) -> OperandIt {
[INFO] [stdout]     |                      --               ^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      lifetime `'a` declared here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]    --> src/operands.rs:191:39
[INFO] [stdout]     |
[INFO] [stdout] 191 |     pub fn variables<'a>(&'a self) -> OperandIt {
[INFO] [stdout]     |                      --               ^^^^^^^^^ this elided lifetime gets resolved as `'a`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      lifetime `'a` declared here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/simplify/simplify.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `constants::CONSTANTS_MAP`
[INFO] [stdout]  --> src/simplify/simplify.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     constants::CONSTANTS_MAP,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `MathTokenType`, `OperationToken`, and `factorization`
[INFO] [stdout]  --> src/simplify/symmetry.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     factorization,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 7 |     MathTokenType, OperationToken,
[INFO] [stdout]   |     ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/equations.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 132 | /             return EquationSolution::SolutionsFor(
[INFO] [stdout] 133 | |                 self.left.root.clone(),
[INFO] [stdout] 134 | |                 vec![self.right.root.clone()],
[INFO] [stdout] 135 | |             );
[INFO] [stdout]     | |_____________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 141 |           EquationSolution::NoSolution
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/equations.rs:190:58
[INFO] [stdout]     |
[INFO] [stdout] 190 |                 TreeNodeRef::new_val(MathToken::variable("x".to_string())),
[INFO] [stdout]     |                                      ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                                      |
[INFO] [stdout]     |                                      arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 190 |                 TreeNodeRef::new_val(MathToken::variable("x".to_string().into())),
[INFO] [stdout]     |                                                                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lexer.rs:75:37
[INFO] [stdout]     |
[INFO] [stdout] 75  |                 MathToken::variable("x".to_string())
[INFO] [stdout]     |                 ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 75  |                 MathToken::variable("x".to_string().into())
[INFO] [stdout]     |                                                    +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:426:37
[INFO] [stdout]     |
[INFO] [stdout] 426 |                 MathToken::variable("x".to_string()),
[INFO] [stdout]     |                 ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 426 |                 MathToken::variable("x".to_string().into()),
[INFO] [stdout]     |                                                    +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:437:62
[INFO] [stdout]     |
[INFO] [stdout] 437 |                     TreeNodeRef::new_val(MathToken::variable("x".to_string()))
[INFO] [stdout]     |                                          ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 437 |                     TreeNodeRef::new_val(MathToken::variable("x".to_string().into()))
[INFO] [stdout]     |                                                                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:452:37
[INFO] [stdout]     |
[INFO] [stdout] 452 |                 MathToken::variable("x".to_string()),
[INFO] [stdout]     |                 ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 452 |                 MathToken::variable("x".to_string().into()),
[INFO] [stdout]     |                                                    +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:468:70
[INFO] [stdout]     |
[INFO] [stdout] 468 | ...                   TreeNodeRef::new_val(MathToken::variable("x".to_string()))
[INFO] [stdout]     |                                            ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 468 |                             TreeNodeRef::new_val(MathToken::variable("x".to_string().into()))
[INFO] [stdout]     |                                                                                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:483:37
[INFO] [stdout]     |
[INFO] [stdout] 483 |                 MathToken::variable("x".to_string()),
[INFO] [stdout]     |                 ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 483 |                 MathToken::variable("x".to_string().into()),
[INFO] [stdout]     |                                                    +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:501:37
[INFO] [stdout]     |
[INFO] [stdout] 501 |                 MathToken::variable("x".to_string()),
[INFO] [stdout]     |                 ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 501 |                 MathToken::variable("x".to_string().into()),
[INFO] [stdout]     |                                                    +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:519:37
[INFO] [stdout]     |
[INFO] [stdout] 519 |                 MathToken::variable("x".to_string()),
[INFO] [stdout]     |                 ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 519 |                 MathToken::variable("x".to_string().into()),
[INFO] [stdout]     |                                                    +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:537:70
[INFO] [stdout]     |
[INFO] [stdout] 537 | ...                   TreeNodeRef::new_val(MathToken::variable("x".to_string())),
[INFO] [stdout]     |                                            ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 537 |                             TreeNodeRef::new_val(MathToken::variable("x".to_string().into())),
[INFO] [stdout]     |                                                                                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:552:37
[INFO] [stdout]     |
[INFO] [stdout] 552 |                 MathToken::variable("x".to_string()),
[INFO] [stdout]     |                 ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 552 |                 MathToken::variable("x".to_string().into()),
[INFO] [stdout]     |                                                    +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/math_tree.rs:572:70
[INFO] [stdout]     |
[INFO] [stdout] 572 | ...                   TreeNodeRef::new_val(MathToken::variable("x".to_string())),
[INFO] [stdout]     |                                            ------------------- ^^^^^^^^^^^^^^^ expected `Rc<String>`, found `String`
[INFO] [stdout]     |                                            |
[INFO] [stdout]     |                                            arguments to this function are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Rc<std::string::String>`
[INFO] [stdout]                found struct `std::string::String`
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]    --> src/lib.rs:209:12
[INFO] [stdout]     |
[INFO] [stdout] 209 |     pub fn variable(s: Rc<String>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^ -------------
[INFO] [stdout] help: call `Into::into` on this expression to convert `std::string::String` into `Rc<std::string::String>`
[INFO] [stdout]     |
[INFO] [stdout] 572 |                             TreeNodeRef::new_val(MathToken::variable("x".to_string().into())),
[INFO] [stdout]     |                                                                                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/pattern.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 | /         assert_eq!(MathTree::like(&MathTree::parse("2^3*2^4").unwrap().root, "x^m*x^n"), Some(HashMap::from([
[INFO] [stdout] 75 | |             ("x".to_string(), TreeNodeRef::constant(dec!(2))),
[INFO] [stdout] 76 | |             ("m".to_string(), TreeNodeRef::constant(dec!(3))),
[INFO] [stdout] 77 | |             ("n".to_string(), TreeNodeRef::constant(dec!(4))),
[INFO] [stdout] 78 | |         ])));
[INFO] [stdout]    | |____________^ expected `Option<HashMap<Rc<String>, ...>>`, found `Option<HashMap<String, ...>>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `std::option::Option<HashMap<Rc<std::string::String>, _>>`
[INFO] [stdout]               found enum `std::option::Option<HashMap<std::string::String, _>>`
[INFO] [stdout]    = note: this error originates in the macro `$crate::assert_eq` which comes from the expansion of the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/pattern.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 | /         assert_eq!(MathTree::like(&MathTree::parse("(x + 2)^2").unwrap().root, "(a + b)^2"), Some(HashMap::from([
[INFO] [stdout] 82 | |             ("a".to_string(), TreeNodeRef::new_val(MathToken::variable(String::from("x").into()))),
[INFO] [stdout] 83 | |             ("b".to_string(), TreeNodeRef::constant(dec!(2))),
[INFO] [stdout] 84 | |         ])));
[INFO] [stdout]    | |____________^ expected `Option<HashMap<Rc<String>, ...>>`, found `Option<HashMap<String, ...>>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `std::option::Option<HashMap<Rc<std::string::String>, _>>`
[INFO] [stdout]               found enum `std::option::Option<HashMap<std::string::String, _>>`
[INFO] [stdout]    = note: this error originates in the macro `$crate::assert_eq` which comes from the expansion of the macro `assert_eq` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `steps`
[INFO] [stdout]   --> src/arithmatic/arithmatic.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     steps: &mut Steps,
[INFO] [stdout]    |     ^^^^^ help: if this is intentional, prefix it with an underscore: `_steps`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/arithmatic/arithmatic.rs:201:14
[INFO] [stdout]     |
[INFO] [stdout] 201 |             |a: &TreeNodeRef, b, desc, bounds| {
[INFO] [stdout]     |              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_variables`
[INFO] [stdout]   --> src/equations.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let left_variables = Function::scan_variables(&self.left.root);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_variables`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_variables`
[INFO] [stdout]   --> src/equations.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let right_variables = Function::scan_variables(&self.right.root);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_right_variables`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/factorization.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let mut multipliers =  node.borrow().calculate_iter().map(|x| x.1.clone()).collect_vec();
[INFO] [stdout]    |             ----^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/factorization.rs:124:36
[INFO] [stdout]     |
[INFO] [stdout] 124 |     fn find_common_factor_constant(mut constants: BTreeSet<Decimal>) -> Option<Decimal> {
[INFO] [stdout]     |                                    ----^^^^^^^^^
[INFO] [stdout]     |                                    |
[INFO] [stdout]     |                                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `state`
[INFO] [stdout]   --> src/math_tree.rs:34:42
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
[INFO] [stdout]    |                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_state`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `skip` is assigned to, but never used
[INFO] [stdout]   --> src/simplify/simplify.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut skip = 0;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_skip` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `skip` is never read
[INFO] [stdout]   --> src/simplify/simplify.rs:70:21
[INFO] [stdout]    |
[INFO] [stdout] 70 |                     skip -= 1;
[INFO] [stdout]    |                     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `algebrars` (lib test) due to 14 previous errors; 31 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5b056871b73560a1d5a733423872e1da751e8732261e71f893121775a2253153", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b056871b73560a1d5a733423872e1da751e8732261e71f893121775a2253153", kill_on_drop: false }`
[INFO] [stdout] 5b056871b73560a1d5a733423872e1da751e8732261e71f893121775a2253153
