Oct 12 17:13:27.841 INFO checking mohas556/cassowaryr against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 17:13:27.843 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-1/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-1/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/source:ro,Z" "-v" "/mnt/big/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +4021bd0b3c5815b087d6db10ce461e7e4854ade7-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Oct 12 17:13:28.401 INFO blam! 4e5cf3ae924828b038d18809f15bf6134a375a67cfd220e1854c8eb4718a26cc
Oct 12 17:13:28.408 INFO running `"docker" "start" "-a" "4e5cf3ae924828b038d18809f15bf6134a375a67cfd220e1854c8eb4718a26cc"`
Oct 12 17:13:29.460 INFO kablam! usermod: no changes
Oct 12 17:13:29.508 INFO kablam!     Checking cassowaryr v0.1.0 (/source)
Oct 12 17:13:29.856 INFO kablam! warning: unnecessary parentheses around `if` condition
Oct 12 17:13:29.856 INFO kablam!     --> src/lib.rs:2055:36
Oct 12 17:13:29.856 INFO kablam!      |
Oct 12 17:13:29.856 INFO kablam! 2055 |                                 if (val > 0f64 && var.pivotable()) {
Oct 12 17:13:29.856 INFO kablam!      |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Oct 12 17:13:29.856 INFO kablam!      |
Oct 12 17:13:29.856 INFO kablam!      = note: #[warn(unused_parens)] on by default
Oct 12 17:13:29.856 INFO kablam! 
Oct 12 17:13:29.920 INFO kablam! warning: unnecessary parentheses around `if` condition
Oct 12 17:13:29.920 INFO kablam!     --> src/lib.rs:2055:36
Oct 12 17:13:29.920 INFO kablam!      |
Oct 12 17:13:29.920 INFO kablam! 2055 |                                 if (val > 0f64 && var.pivotable()) {
Oct 12 17:13:29.920 INFO kablam!      |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Oct 12 17:13:29.920 INFO kablam!      |
Oct 12 17:13:29.920 INFO kablam!      = note: #[warn(unused_parens)] on by default
Oct 12 17:13:29.920 INFO kablam! 
Oct 12 17:13:30.200 INFO kablam! warning: value assigned to `prev_edit_constant` is never read
Oct 12 17:13:30.200 INFO kablam!     --> src/lib.rs:1838:25
Oct 12 17:13:30.200 INFO kablam!      |
Oct 12 17:13:30.200 INFO kablam! 1838 |                         prev_edit_constant =  some_val;
Oct 12 17:13:30.200 INFO kablam!      |                         ^^^^^^^^^^^^^^^^^^
Oct 12 17:13:30.200 INFO kablam!      |
Oct 12 17:13:30.200 INFO kablam!      = note: #[warn(unused_assignments)] on by default
Oct 12 17:13:30.200 INFO kablam! 
Oct 12 17:13:30.200 INFO kablam! warning: value assigned to `r` is never read
Oct 12 17:13:30.200 INFO kablam!     --> src/lib.rs:2006:25
Oct 12 17:13:30.200 INFO kablam!      |
Oct 12 17:13:30.200 INFO kablam! 2006 |                 let mut r: f64 = 0f64;
Oct 12 17:13:30.200 INFO kablam!      |                         ^
Oct 12 17:13:30.200 INFO kablam! 
Oct 12 17:13:30.244 INFO kablam! warning: value assigned to `prev_edit_constant` is never read
Oct 12 17:13:30.244 INFO kablam!     --> src/lib.rs:1838:25
Oct 12 17:13:30.244 INFO kablam!      |
Oct 12 17:13:30.244 INFO kablam! 1838 |                         prev_edit_constant =  some_val;
Oct 12 17:13:30.244 INFO kablam!      |                         ^^^^^^^^^^^^^^^^^^
Oct 12 17:13:30.244 INFO kablam!      |
Oct 12 17:13:30.244 INFO kablam!      = note: #[warn(unused_assignments)] on by default
Oct 12 17:13:30.244 INFO kablam! 
Oct 12 17:13:30.244 INFO kablam! warning: value assigned to `r` is never read
Oct 12 17:13:30.244 INFO kablam!     --> src/lib.rs:2006:25
Oct 12 17:13:30.244 INFO kablam!      |
Oct 12 17:13:30.244 INFO kablam! 2006 |                 let mut r: f64 = 0f64;
Oct 12 17:13:30.244 INFO kablam!      |                         ^
Oct 12 17:13:30.244 INFO kablam! 
Oct 12 17:13:31.004 INFO kablam! warning: value assigned to `prev_edit_constant` is never read
Oct 12 17:13:31.004 INFO kablam!     --> src/main.rs:1830:7
Oct 12 17:13:31.004 INFO kablam!      |
Oct 12 17:13:31.004 INFO kablam! 1830 |                         prev_edit_constant =  some_val;
Oct 12 17:13:31.004 INFO kablam!      |                         ^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.004 INFO kablam!      |
Oct 12 17:13:31.004 INFO kablam!      = note: #[warn(unused_assignments)] on by default
Oct 12 17:13:31.004 INFO kablam! 
Oct 12 17:13:31.004 INFO kablam! warning: value assigned to `r` is never read
Oct 12 17:13:31.004 INFO kablam!     --> src/main.rs:1997:25
Oct 12 17:13:31.004 INFO kablam!      |
Oct 12 17:13:31.004 INFO kablam! 1997 |                 let mut r: f64 = 0f64;
Oct 12 17:13:31.004 INFO kablam!      |                         ^
Oct 12 17:13:31.004 INFO kablam! 
Oct 12 17:13:31.052 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.052 INFO kablam!    --> src/main.rs:863:14
Oct 12 17:13:31.052 INFO kablam!     |
Oct 12 17:13:31.052 INFO kablam! 863 |             let mut expr = Rc::new(Expression::new_blank());
Oct 12 17:13:31.052 INFO kablam!     |                 ----^^^^
Oct 12 17:13:31.052 INFO kablam!     |                 |
Oct 12 17:13:31.052 INFO kablam!     |                 help: remove this `mut`
Oct 12 17:13:31.052 INFO kablam!     |
Oct 12 17:13:31.052 INFO kablam!     = note: #[warn(unused_mut)] on by default
Oct 12 17:13:31.052 INFO kablam! 
Oct 12 17:13:31.052 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.052 INFO kablam!    --> src/main.rs:915:21
Oct 12 17:13:31.052 INFO kablam!     |
Oct 12 17:13:31.052 INFO kablam! 915 |                 let mut expr = Rc::new(Expression::new_single_variable(var_two));
Oct 12 17:13:31.052 INFO kablam!     |                     ----^^^^
Oct 12 17:13:31.052 INFO kablam!     |                     |
Oct 12 17:13:31.052 INFO kablam!     |                     help: remove this `mut`
Oct 12 17:13:31.052 INFO kablam! 
Oct 12 17:13:31.052 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.052 INFO kablam!    --> src/main.rs:937:17
Oct 12 17:13:31.052 INFO kablam!     |
Oct 12 17:13:31.052 INFO kablam! 937 |             let mut cexpr: Rc<Expression> = expr.clone();
Oct 12 17:13:31.052 INFO kablam!     |                 ----^^^^^
Oct 12 17:13:31.052 INFO kablam!     |                 |
Oct 12 17:13:31.052 INFO kablam!     |                 help: remove this `mut`
Oct 12 17:13:31.052 INFO kablam! 
Oct 12 17:13:31.052 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.052 INFO kablam!    --> src/main.rs:966:17
Oct 12 17:13:31.052 INFO kablam!     |
Oct 12 17:13:31.052 INFO kablam! 966 |             let mut expr = expr_two.clone();
Oct 12 17:13:31.052 INFO kablam!     |                 ----^^^^
Oct 12 17:13:31.052 INFO kablam!     |                 |
Oct 12 17:13:31.052 INFO kablam!     |                 help: remove this `mut`
Oct 12 17:13:31.052 INFO kablam! 
Oct 12 17:13:31.062 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.062 INFO kablam!     --> src/main.rs:1146:17
Oct 12 17:13:31.062 INFO kablam!      |
Oct 12 17:13:31.062 INFO kablam! 1146 |             let mut expr = Rc::new(Expression::new_blank());
Oct 12 17:13:31.062 INFO kablam!      |                 ----^^^^
Oct 12 17:13:31.062 INFO kablam!      |                 |
Oct 12 17:13:31.062 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.062 INFO kablam! 
Oct 12 17:13:31.062 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.062 INFO kablam!     --> src/main.rs:1268:17
Oct 12 17:13:31.062 INFO kablam!      |
Oct 12 17:13:31.062 INFO kablam! 1268 |             let mut prev_edit_constant = 0f64;
Oct 12 17:13:31.062 INFO kablam!      |                 ----^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.062 INFO kablam!      |                 |
Oct 12 17:13:31.062 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.062 INFO kablam! 
Oct 12 17:13:31.062 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.062 INFO kablam!     --> src/main.rs:1270:17
Oct 12 17:13:31.062 INFO kablam!      |
Oct 12 17:13:31.062 INFO kablam! 1270 |             let mut expr = self.new_expression(constraint,
Oct 12 17:13:31.062 INFO kablam!      |                 ----^^^^
Oct 12 17:13:31.062 INFO kablam!      |                 |
Oct 12 17:13:31.062 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.062 INFO kablam! 
Oct 12 17:13:31.071 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.071 INFO kablam!     --> src/main.rs:1389:22
Oct 12 17:13:31.071 INFO kablam!      |
Oct 12 17:13:31.071 INFO kablam! 1389 |                 Some(mut expr) => {
Oct 12 17:13:31.071 INFO kablam!      |                      ----^^^^
Oct 12 17:13:31.071 INFO kablam!      |                      |
Oct 12 17:13:31.071 INFO kablam!      |                      help: remove this `mut`
Oct 12 17:13:31.071 INFO kablam! 
Oct 12 17:13:31.088 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.088 INFO kablam!     --> src/main.rs:1429:17
Oct 12 17:13:31.088 INFO kablam!      |
Oct 12 17:13:31.088 INFO kablam! 1429 |             let mut obj_row: Rc<Expression> = self.get_row_expression(&obj).unwrap();
Oct 12 17:13:31.088 INFO kablam!      |                 ----^^^^^^^
Oct 12 17:13:31.088 INFO kablam!      |                 |
Oct 12 17:13:31.088 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.088 INFO kablam! 
Oct 12 17:13:31.088 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.088 INFO kablam!     --> src/main.rs:1432:17
Oct 12 17:13:31.088 INFO kablam!      |
Oct 12 17:13:31.088 INFO kablam! 1432 |             let mut error_option = self.error_vars.borrow_mut().get(constraint).map(|x| x.clone());
Oct 12 17:13:31.088 INFO kablam!      |                 ----^^^^^^^^^^^^
Oct 12 17:13:31.088 INFO kablam!      |                 |
Oct 12 17:13:31.088 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.088 INFO kablam! 
Oct 12 17:13:31.101 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.101 INFO kablam!     --> src/main.rs:1760:25
Oct 12 17:13:31.101 INFO kablam!      |
Oct 12 17:13:31.101 INFO kablam! 1760 |                     let mut row_expr = self.get_row_expression(&obj).unwrap();
Oct 12 17:13:31.101 INFO kablam!      |                         ----^^^^^^^^
Oct 12 17:13:31.101 INFO kablam!      |                         |
Oct 12 17:13:31.101 INFO kablam!      |                         help: remove this `mut`
Oct 12 17:13:31.101 INFO kablam! 
Oct 12 17:13:31.101 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.101 INFO kablam!     --> src/main.rs:1800:25
Oct 12 17:13:31.101 INFO kablam!      |
Oct 12 17:13:31.101 INFO kablam! 1800 |                     let mut row_expr = self.get_row_expression(&obj).unwrap();
Oct 12 17:13:31.101 INFO kablam!      |                         ----^^^^^^^^
Oct 12 17:13:31.101 INFO kablam!      |                         |
Oct 12 17:13:31.101 INFO kablam!      |                         help: remove this `mut`
Oct 12 17:13:31.101 INFO kablam! 
Oct 12 17:13:31.101 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.101 INFO kablam!     --> src/main.rs:1816:25
Oct 12 17:13:31.102 INFO kablam!      |
Oct 12 17:13:31.102 INFO kablam! 1816 |                     let mut some_val = constraint_expr.mref.borrow().clone().constant.clone();
Oct 12 17:13:31.102 INFO kablam!      |                         ----^^^^^^^^
Oct 12 17:13:31.102 INFO kablam!      |                         |
Oct 12 17:13:31.102 INFO kablam!      |                         help: remove this `mut`
Oct 12 17:13:31.102 INFO kablam! 
Oct 12 17:13:31.120 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.120 INFO kablam!     --> src/main.rs:2038:17
Oct 12 17:13:31.120 INFO kablam!      |
Oct 12 17:13:31.120 INFO kablam! 2038 |             let mut len = self.infeasible_rows.borrow().len();
Oct 12 17:13:31.120 INFO kablam!      |                 ----^^^
Oct 12 17:13:31.120 INFO kablam!      |                 |
Oct 12 17:13:31.120 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.120 INFO kablam! 
Oct 12 17:13:31.124 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.125 INFO kablam!     --> src/main.rs:2184:14
Oct 12 17:13:31.125 INFO kablam!      |
Oct 12 17:13:31.125 INFO kablam! 2184 |             let mut m = self.columns.borrow().clone();
Oct 12 17:13:31.125 INFO kablam!      |                 ----^
Oct 12 17:13:31.125 INFO kablam!      |                 |
Oct 12 17:13:31.125 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.125 INFO kablam! 
Oct 12 17:13:31.160 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.160 INFO kablam!     --> src/main.rs:1216:10
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam! 1216 |             self.add_constraint(&c);
Oct 12 17:13:31.160 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam!      = note: #[warn(unused_must_use)] on by default
Oct 12 17:13:31.160 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.160 INFO kablam! 
Oct 12 17:13:31.160 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.160 INFO kablam!     --> src/main.rs:1280:21
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam! 1280 |                     self.add_with_artificial(&expr);
Oct 12 17:13:31.160 INFO kablam!      |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.160 INFO kablam! 
Oct 12 17:13:31.160 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.160 INFO kablam!     --> src/main.rs:1307:17
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam! 1307 |                 self.optimise(&obj);
Oct 12 17:13:31.160 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.160 INFO kablam! 
Oct 12 17:13:31.160 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.160 INFO kablam!     --> src/main.rs:1373:13
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam! 1373 |             self.optimise(&obj_var);
Oct 12 17:13:31.160 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.160 INFO kablam! 
Oct 12 17:13:31.160 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.160 INFO kablam!     --> src/main.rs:1401:29
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.160 INFO kablam! 1401 |                             self.pivot(&entry_var, &slack_var);
Oct 12 17:13:31.160 INFO kablam!      |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.160 INFO kablam!      |
Oct 12 17:13:31.161 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.161 INFO kablam! 
Oct 12 17:13:31.161 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.161 INFO kablam!     --> src/main.rs:1514:25
Oct 12 17:13:31.161 INFO kablam!      |
Oct 12 17:13:31.161 INFO kablam! 1514 |                         self.pivot(&marker, &exit_var.unwrap());
Oct 12 17:13:31.161 INFO kablam!      |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.161 INFO kablam!      |
Oct 12 17:13:31.161 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.161 INFO kablam! 
Oct 12 17:13:31.161 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.161 INFO kablam!     --> src/main.rs:1574:17
Oct 12 17:13:31.161 INFO kablam!      |
Oct 12 17:13:31.161 INFO kablam! 1574 |                 self.optimise(&obj);
Oct 12 17:13:31.161 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.161 INFO kablam!      |
Oct 12 17:13:31.161 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.161 INFO kablam! 
Oct 12 17:13:31.161 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.161 INFO kablam!     --> src/main.rs:1691:13
Oct 12 17:13:31.161 INFO kablam!      |
Oct 12 17:13:31.161 INFO kablam! 1691 |             self.remove_constraint(constraint);
Oct 12 17:13:31.161 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.161 INFO kablam!      |
Oct 12 17:13:31.161 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.161 INFO kablam! 
Oct 12 17:13:31.164 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.164 INFO kablam!     --> src/main.rs:1702:17
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam! 1702 |                 self.add_edit_var(var, Strength::REQUIRED);
Oct 12 17:13:31.164 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.164 INFO kablam! 
Oct 12 17:13:31.164 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.164 INFO kablam!     --> src/main.rs:1703:17
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam! 1703 |                 self.begin_edit();
Oct 12 17:13:31.164 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.164 INFO kablam! 
Oct 12 17:13:31.164 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.164 INFO kablam!     --> src/main.rs:1706:25
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam! 1706 |                         self.end_edit();
Oct 12 17:13:31.164 INFO kablam!      |                         ^^^^^^^^^^^^^^^^
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.164 INFO kablam! 
Oct 12 17:13:31.164 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.164 INFO kablam!     --> src/main.rs:1854:13
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam! 1854 |             self.dual_optimise();
Oct 12 17:13:31.164 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.164 INFO kablam! 
Oct 12 17:13:31.164 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.164 INFO kablam!     --> src/main.rs:2026:17
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam! 2026 |                 self.pivot(&entry_var.clone().unwrap(), &exit_var.clone().unwrap());
Oct 12 17:13:31.164 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.164 INFO kablam! 
Oct 12 17:13:31.164 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.164 INFO kablam!     --> src/main.rs:2069:29
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.164 INFO kablam! 2069 |                             self.pivot(&entry_var.clone().unwrap(), &exit_var);
Oct 12 17:13:31.164 INFO kablam!      |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.164 INFO kablam!      |
Oct 12 17:13:31.165 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.165 INFO kablam! 
Oct 12 17:13:31.196 INFO kablam! warning: value assigned to `prev_edit_constant` is never read
Oct 12 17:13:31.196 INFO kablam!     --> src/main.rs:1830:7
Oct 12 17:13:31.196 INFO kablam!      |
Oct 12 17:13:31.196 INFO kablam! 1830 |                         prev_edit_constant =  some_val;
Oct 12 17:13:31.196 INFO kablam!      |                         ^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.196 INFO kablam!      |
Oct 12 17:13:31.196 INFO kablam!      = note: #[warn(unused_assignments)] on by default
Oct 12 17:13:31.196 INFO kablam! 
Oct 12 17:13:31.196 INFO kablam! warning: value assigned to `r` is never read
Oct 12 17:13:31.196 INFO kablam!     --> src/main.rs:1997:25
Oct 12 17:13:31.196 INFO kablam!      |
Oct 12 17:13:31.196 INFO kablam! 1997 |                 let mut r: f64 = 0f64;
Oct 12 17:13:31.196 INFO kablam!      |                         ^
Oct 12 17:13:31.196 INFO kablam! 
Oct 12 17:13:31.228 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.229 INFO kablam!    --> src/main.rs:863:14
Oct 12 17:13:31.229 INFO kablam!     |
Oct 12 17:13:31.229 INFO kablam! 863 |             let mut expr = Rc::new(Expression::new_blank());
Oct 12 17:13:31.229 INFO kablam!     |                 ----^^^^
Oct 12 17:13:31.229 INFO kablam!     |                 |
Oct 12 17:13:31.229 INFO kablam!     |                 help: remove this `mut`
Oct 12 17:13:31.229 INFO kablam!     |
Oct 12 17:13:31.229 INFO kablam!     = note: #[warn(unused_mut)] on by default
Oct 12 17:13:31.229 INFO kablam! 
Oct 12 17:13:31.231 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.231 INFO kablam!    --> src/main.rs:915:21
Oct 12 17:13:31.231 INFO kablam!     |
Oct 12 17:13:31.231 INFO kablam! 915 |                 let mut expr = Rc::new(Expression::new_single_variable(var_two));
Oct 12 17:13:31.231 INFO kablam!     |                     ----^^^^
Oct 12 17:13:31.231 INFO kablam!     |                     |
Oct 12 17:13:31.231 INFO kablam!     |                     help: remove this `mut`
Oct 12 17:13:31.231 INFO kablam! 
Oct 12 17:13:31.231 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.231 INFO kablam!    --> src/main.rs:937:17
Oct 12 17:13:31.231 INFO kablam!     |
Oct 12 17:13:31.231 INFO kablam! 937 |             let mut cexpr: Rc<Expression> = expr.clone();
Oct 12 17:13:31.231 INFO kablam!     |                 ----^^^^^
Oct 12 17:13:31.231 INFO kablam!     |                 |
Oct 12 17:13:31.231 INFO kablam!     |                 help: remove this `mut`
Oct 12 17:13:31.231 INFO kablam! 
Oct 12 17:13:31.231 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.231 INFO kablam!    --> src/main.rs:966:17
Oct 12 17:13:31.231 INFO kablam!     |
Oct 12 17:13:31.231 INFO kablam! 966 |             let mut expr = expr_two.clone();
Oct 12 17:13:31.231 INFO kablam!     |                 ----^^^^
Oct 12 17:13:31.231 INFO kablam!     |                 |
Oct 12 17:13:31.231 INFO kablam!     |                 help: remove this `mut`
Oct 12 17:13:31.231 INFO kablam! 
Oct 12 17:13:31.233 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.233 INFO kablam!     --> src/main.rs:1146:17
Oct 12 17:13:31.233 INFO kablam!      |
Oct 12 17:13:31.233 INFO kablam! 1146 |             let mut expr = Rc::new(Expression::new_blank());
Oct 12 17:13:31.233 INFO kablam!      |                 ----^^^^
Oct 12 17:13:31.233 INFO kablam!      |                 |
Oct 12 17:13:31.233 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.233 INFO kablam! 
Oct 12 17:13:31.246 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.246 INFO kablam!     --> src/main.rs:1268:17
Oct 12 17:13:31.246 INFO kablam!      |
Oct 12 17:13:31.246 INFO kablam! 1268 |             let mut prev_edit_constant = 0f64;
Oct 12 17:13:31.246 INFO kablam!      |                 ----^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.246 INFO kablam!      |                 |
Oct 12 17:13:31.246 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.246 INFO kablam! 
Oct 12 17:13:31.246 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.246 INFO kablam!     --> src/main.rs:1270:17
Oct 12 17:13:31.246 INFO kablam!      |
Oct 12 17:13:31.246 INFO kablam! 1270 |             let mut expr = self.new_expression(constraint,
Oct 12 17:13:31.246 INFO kablam!      |                 ----^^^^
Oct 12 17:13:31.246 INFO kablam!      |                 |
Oct 12 17:13:31.246 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.246 INFO kablam! 
Oct 12 17:13:31.252 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.252 INFO kablam!     --> src/main.rs:1389:22
Oct 12 17:13:31.252 INFO kablam!      |
Oct 12 17:13:31.252 INFO kablam! 1389 |                 Some(mut expr) => {
Oct 12 17:13:31.252 INFO kablam!      |                      ----^^^^
Oct 12 17:13:31.252 INFO kablam!      |                      |
Oct 12 17:13:31.252 INFO kablam!      |                      help: remove this `mut`
Oct 12 17:13:31.252 INFO kablam! 
Oct 12 17:13:31.280 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.280 INFO kablam!     --> src/main.rs:1429:17
Oct 12 17:13:31.280 INFO kablam!      |
Oct 12 17:13:31.280 INFO kablam! 1429 |             let mut obj_row: Rc<Expression> = self.get_row_expression(&obj).unwrap();
Oct 12 17:13:31.284 INFO kablam!      |                 ----^^^^^^^
Oct 12 17:13:31.284 INFO kablam!      |                 |
Oct 12 17:13:31.288 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.288 INFO kablam! 
Oct 12 17:13:31.288 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.288 INFO kablam!     --> src/main.rs:1432:17
Oct 12 17:13:31.288 INFO kablam!      |
Oct 12 17:13:31.288 INFO kablam! 1432 |             let mut error_option = self.error_vars.borrow_mut().get(constraint).map(|x| x.clone());
Oct 12 17:13:31.288 INFO kablam!      |                 ----^^^^^^^^^^^^
Oct 12 17:13:31.288 INFO kablam!      |                 |
Oct 12 17:13:31.288 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.288 INFO kablam! 
Oct 12 17:13:31.288 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.288 INFO kablam!     --> src/main.rs:1760:25
Oct 12 17:13:31.288 INFO kablam!      |
Oct 12 17:13:31.288 INFO kablam! 1760 |                     let mut row_expr = self.get_row_expression(&obj).unwrap();
Oct 12 17:13:31.288 INFO kablam!      |                         ----^^^^^^^^
Oct 12 17:13:31.288 INFO kablam!      |                         |
Oct 12 17:13:31.288 INFO kablam!      |                         help: remove this `mut`
Oct 12 17:13:31.288 INFO kablam! 
Oct 12 17:13:31.288 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.288 INFO kablam!     --> src/main.rs:1800:25
Oct 12 17:13:31.288 INFO kablam!      |
Oct 12 17:13:31.288 INFO kablam! 1800 |                     let mut row_expr = self.get_row_expression(&obj).unwrap();
Oct 12 17:13:31.288 INFO kablam!      |                         ----^^^^^^^^
Oct 12 17:13:31.288 INFO kablam!      |                         |
Oct 12 17:13:31.288 INFO kablam!      |                         help: remove this `mut`
Oct 12 17:13:31.288 INFO kablam! 
Oct 12 17:13:31.288 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.288 INFO kablam!     --> src/main.rs:1816:25
Oct 12 17:13:31.288 INFO kablam!      |
Oct 12 17:13:31.288 INFO kablam! 1816 |                     let mut some_val = constraint_expr.mref.borrow().clone().constant.clone();
Oct 12 17:13:31.288 INFO kablam!      |                         ----^^^^^^^^
Oct 12 17:13:31.288 INFO kablam!      |                         |
Oct 12 17:13:31.288 INFO kablam!      |                         help: remove this `mut`
Oct 12 17:13:31.288 INFO kablam! 
Oct 12 17:13:31.308 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.308 INFO kablam!     --> src/main.rs:2038:17
Oct 12 17:13:31.308 INFO kablam!      |
Oct 12 17:13:31.308 INFO kablam! 2038 |             let mut len = self.infeasible_rows.borrow().len();
Oct 12 17:13:31.308 INFO kablam!      |                 ----^^^
Oct 12 17:13:31.308 INFO kablam!      |                 |
Oct 12 17:13:31.308 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.308 INFO kablam! 
Oct 12 17:13:31.312 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.312 INFO kablam!     --> src/main.rs:2184:14
Oct 12 17:13:31.312 INFO kablam!      |
Oct 12 17:13:31.312 INFO kablam! 2184 |             let mut m = self.columns.borrow().clone();
Oct 12 17:13:31.312 INFO kablam!      |                 ----^
Oct 12 17:13:31.312 INFO kablam!      |                 |
Oct 12 17:13:31.312 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.312 INFO kablam! 
Oct 12 17:13:31.328 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.328 INFO kablam!     --> src/main.rs:2406:17
Oct 12 17:13:31.328 INFO kablam!      |
Oct 12 17:13:31.328 INFO kablam! 2406 |             let mut x: Rc<Variable> = Rc::new(Variable::new(String::from("var1"),
Oct 12 17:13:31.328 INFO kablam!      |                 ----^
Oct 12 17:13:31.328 INFO kablam!      |                 |
Oct 12 17:13:31.328 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.328 INFO kablam! 
Oct 12 17:13:31.328 INFO kablam! warning: variable does not need to be mutable
Oct 12 17:13:31.328 INFO kablam!     --> src/main.rs:2410:17
Oct 12 17:13:31.328 INFO kablam!      |
Oct 12 17:13:31.328 INFO kablam! 2410 |             let mut y: Rc<Variable> = Rc::new(Variable::new(String::from("var2"),
Oct 12 17:13:31.328 INFO kablam!      |                 ----^
Oct 12 17:13:31.328 INFO kablam!      |                 |
Oct 12 17:13:31.328 INFO kablam!      |                 help: remove this `mut`
Oct 12 17:13:31.328 INFO kablam! 
Oct 12 17:13:31.348 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.348 INFO kablam!     --> src/main.rs:1216:10
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam! 1216 |             self.add_constraint(&c);
Oct 12 17:13:31.348 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam!      = note: #[warn(unused_must_use)] on by default
Oct 12 17:13:31.348 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.348 INFO kablam! 
Oct 12 17:13:31.348 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.348 INFO kablam!     --> src/main.rs:1280:21
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam! 1280 |                     self.add_with_artificial(&expr);
Oct 12 17:13:31.348 INFO kablam!      |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.348 INFO kablam! 
Oct 12 17:13:31.348 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.348 INFO kablam!     --> src/main.rs:1307:17
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam! 1307 |                 self.optimise(&obj);
Oct 12 17:13:31.348 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.348 INFO kablam! 
Oct 12 17:13:31.348 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.348 INFO kablam!     --> src/main.rs:1373:13
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam! 1373 |             self.optimise(&obj_var);
Oct 12 17:13:31.348 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.348 INFO kablam! 
Oct 12 17:13:31.348 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.348 INFO kablam!     --> src/main.rs:1401:29
Oct 12 17:13:31.348 INFO kablam!      |
Oct 12 17:13:31.348 INFO kablam! 1401 |                             self.pivot(&entry_var, &slack_var);
Oct 12 17:13:31.349 INFO kablam!      |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:1514:25
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 1514 |                         self.pivot(&marker, &exit_var.unwrap());
Oct 12 17:13:31.349 INFO kablam!      |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:1574:17
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 1574 |                 self.optimise(&obj);
Oct 12 17:13:31.349 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:1691:13
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 1691 |             self.remove_constraint(constraint);
Oct 12 17:13:31.349 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:1702:17
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 1702 |                 self.add_edit_var(var, Strength::REQUIRED);
Oct 12 17:13:31.349 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:1703:17
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 1703 |                 self.begin_edit();
Oct 12 17:13:31.349 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:1706:25
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 1706 |                         self.end_edit();
Oct 12 17:13:31.349 INFO kablam!      |                         ^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:1854:13
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 1854 |             self.dual_optimise();
Oct 12 17:13:31.349 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:2026:17
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 2026 |                 self.pivot(&entry_var.clone().unwrap(), &exit_var.clone().unwrap());
Oct 12 17:13:31.349 INFO kablam!      |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:2069:29
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 2069 |                             self.pivot(&entry_var.clone().unwrap(), &exit_var);
Oct 12 17:13:31.349 INFO kablam!      |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.349 INFO kablam! 
Oct 12 17:13:31.349 INFO kablam! warning: unused `std::result::Result` which must be used
Oct 12 17:13:31.349 INFO kablam!     --> src/main.rs:2424:13
Oct 12 17:13:31.349 INFO kablam!      |
Oct 12 17:13:31.349 INFO kablam! 2424 |             s.add_constraint(&c);
Oct 12 17:13:31.349 INFO kablam!      |             ^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:13:31.352 INFO kablam!      |
Oct 12 17:13:31.352 INFO kablam!      = note: this `Result` may be an `Err` variant, which should be handled
Oct 12 17:13:31.352 INFO kablam! 
Oct 12 17:13:31.408 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.91s
Oct 12 17:13:31.412 INFO kablam! su: No module specific data is present
Oct 12 17:13:31.832 INFO running `"docker" "rm" "-f" "4e5cf3ae924828b038d18809f15bf6134a375a67cfd220e1854c8eb4718a26cc"`
Oct 12 17:13:31.982 INFO blam! 4e5cf3ae924828b038d18809f15bf6134a375a67cfd220e1854c8eb4718a26cc