[INFO] cloning repository https://github.com/Sherif-Abdou/basic-algebra
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sherif-Abdou/basic-algebra" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSherif-Abdou%2Fbasic-algebra", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSherif-Abdou%2Fbasic-algebra'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68f7850565c1d8a03512daa152434c4333c93b4a
[INFO] checking Sherif-Abdou/basic-algebra against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSherif-Abdou%2Fbasic-algebra" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Sherif-Abdou/basic-algebra
[INFO] finished tweaking git repo https://github.com/Sherif-Abdou/basic-algebra
[INFO] tweaked toml for git repo https://github.com/Sherif-Abdou/basic-algebra written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Sherif-Abdou/basic-algebra on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Sherif-Abdou/basic-algebra 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a08c76afcfafd015543eeccfde8cc43d97e74d271f07e5b040bc9c9b6c55120a
[INFO] running `Command { std: "docker" "start" "-a" "a08c76afcfafd015543eeccfde8cc43d97e74d271f07e5b040bc9c9b6c55120a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a08c76afcfafd015543eeccfde8cc43d97e74d271f07e5b040bc9c9b6c55120a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a08c76afcfafd015543eeccfde8cc43d97e74d271f07e5b040bc9c9b6c55120a", kill_on_drop: false }`
[INFO] [stdout] a08c76afcfafd015543eeccfde8cc43d97e74d271f07e5b040bc9c9b6c55120a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3101b948bc982a3bdac01a4e66d3929fefb38c5e294e93fa636b7c03964840cf
[INFO] running `Command { std: "docker" "start" "-a" "3101b948bc982a3bdac01a4e66d3929fefb38c5e294e93fa636b7c03964840cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking algebra v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/equation_solver.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/equation_solver.rs:77:32
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let new_left_side = if (!flip) {
[INFO] [stdout]    |                                ^     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 -         let new_left_side = if (!flip) {
[INFO] [stdout] 77 +         let new_left_side = if !flip  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/equation_solver.rs:101:19
[INFO] [stdout]     |
[INFO] [stdout] 101 |         return if (!flip) {
[INFO] [stdout]     |                   ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 101 -         return if (!flip) {
[INFO] [stdout] 101 +         return if !flip  {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::equation::*`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::equation::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:50:26
[INFO] [stdout]    |
[INFO] [stdout] 50 |             let values = (*box_tuple.clone());
[INFO] [stdout]    |                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 50 -             let values = (*box_tuple.clone());
[INFO] [stdout] 50 +             let values = *box_tuple.clone() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:58:26
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let values = (*box_tuple.clone());
[INFO] [stdout]    |                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 58 -             let values = (*box_tuple.clone());
[INFO] [stdout] 58 +             let values = *box_tuple.clone() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:66:26
[INFO] [stdout]    |
[INFO] [stdout] 66 |             let values = (*box_tuple.clone());
[INFO] [stdout]    |                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 66 -             let values = (*box_tuple.clone());
[INFO] [stdout] 66 +             let values = *box_tuple.clone() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:74:26
[INFO] [stdout]    |
[INFO] [stdout] 74 |             let values = (*box_tuple.clone());
[INFO] [stdout]    |                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 74 -             let values = (*box_tuple.clone());
[INFO] [stdout] 74 +             let values = *box_tuple.clone() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/equation_solver.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let mut variable_path = self.get_variable_path()?;
[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/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let mut new_eq_result = solver.solve_step();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/equation_solver.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/equation_solver.rs:77:32
[INFO] [stdout]    |
[INFO] [stdout] 77 |         let new_left_side = if (!flip) {
[INFO] [stdout]    |                                ^     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 77 -         let new_left_side = if (!flip) {
[INFO] [stdout] 77 +         let new_left_side = if !flip  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/equation_solver.rs:101:19
[INFO] [stdout]     |
[INFO] [stdout] 101 |         return if (!flip) {
[INFO] [stdout]     |                   ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 101 -         return if (!flip) {
[INFO] [stdout] 101 +         return if !flip  {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::equation::*`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::equation::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:50:26
[INFO] [stdout]    |
[INFO] [stdout] 50 |             let values = (*box_tuple.clone());
[INFO] [stdout]    |                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 50 -             let values = (*box_tuple.clone());
[INFO] [stdout] 50 +             let values = *box_tuple.clone() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:58:26
[INFO] [stdout]    |
[INFO] [stdout] 58 |             let values = (*box_tuple.clone());
[INFO] [stdout]    |                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 58 -             let values = (*box_tuple.clone());
[INFO] [stdout] 58 +             let values = *box_tuple.clone() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:66:26
[INFO] [stdout]    |
[INFO] [stdout] 66 |             let values = (*box_tuple.clone());
[INFO] [stdout]    |                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 66 -             let values = (*box_tuple.clone());
[INFO] [stdout] 66 +             let values = *box_tuple.clone() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/main.rs:74:26
[INFO] [stdout]    |
[INFO] [stdout] 74 |             let values = (*box_tuple.clone());
[INFO] [stdout]    |                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 74 -             let values = (*box_tuple.clone());
[INFO] [stdout] 74 +             let values = *box_tuple.clone() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         let mut equation = equation::Equation::from_tokens(tokens);
[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/main.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |         let mut solver =
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `right_side` and `left_side` are never read
[INFO] [stdout]  --> src/equation.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Equation {
[INFO] [stdout]   |            -------- fields in this struct
[INFO] [stdout] 4 |     tokens: Vec<String>,
[INFO] [stdout] 5 |     pub right_side: Option<ExpressionType>,
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 6 |     pub left_side: Option<ExpressionType>,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/equation_solver.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let mut variable_path = self.get_variable_path()?;
[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/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let mut new_eq_result = solver.solve_step();
[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/main.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         let mut equation = equation::Equation::from_tokens(tokens);
[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/main.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |         let mut solver =
[INFO] [stdout]     |             ----^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `right_side` and `left_side` are never read
[INFO] [stdout]  --> src/equation.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Equation {
[INFO] [stdout]   |            -------- fields in this struct
[INFO] [stdout] 4 |     tokens: Vec<String>,
[INFO] [stdout] 5 |     pub right_side: Option<ExpressionType>,
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 6 |     pub left_side: Option<ExpressionType>,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.84s
[INFO] running `Command { std: "docker" "inspect" "3101b948bc982a3bdac01a4e66d3929fefb38c5e294e93fa636b7c03964840cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3101b948bc982a3bdac01a4e66d3929fefb38c5e294e93fa636b7c03964840cf", kill_on_drop: false }`
[INFO] [stdout] 3101b948bc982a3bdac01a4e66d3929fefb38c5e294e93fa636b7c03964840cf