[INFO] updating cached repository dewaka/forth-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dewaka/forth-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dewaka/forth-rs" "work/ex/clippy-test-run/sources/stable/gh/dewaka/forth-rs"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/dewaka/forth-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dewaka/forth-rs" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/dewaka/forth-rs"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/dewaka/forth-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fe23d0beae5cac3ccc27c137aabba8665cc644b3
[INFO] sha for GitHub repo dewaka/forth-rs: fe23d0beae5cac3ccc27c137aabba8665cc644b3
[INFO] validating manifest of dewaka/forth-rs on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dewaka/forth-rs on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dewaka/forth-rs
[INFO] finished frobbing dewaka/forth-rs
[INFO] frobbed toml for dewaka/forth-rs written to work/ex/clippy-test-run/sources/stable/gh/dewaka/forth-rs/Cargo.toml
[INFO] started frobbing dewaka/forth-rs
[INFO] finished frobbing dewaka/forth-rs
[INFO] frobbed toml for dewaka/forth-rs written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/dewaka/forth-rs/Cargo.toml
[INFO] crate dewaka/forth-rs has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting dewaka/forth-rs against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/dewaka/forth-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0fd373e266ccf2467fcfa6d185aa776bfdcc48ae542fabd731cd6be259ca38d5
[INFO] running `"docker" "start" "-a" "0fd373e266ccf2467fcfa6d185aa776bfdcc48ae542fabd731cd6be259ca38d5"`
[INFO] [stderr]     Checking forth-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> src/forth/ops.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |     println!("");
[INFO] [stderr]    |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> src/forth/ops.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |     println!("");
[INFO] [stderr]    |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::println_empty_string)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]   --> src/forth/env.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |         self.vars.get(name).map(|v| v.clone())
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.vars.get(name).cloned()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]   --> src/forth/env.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |         self.constants.get(name).map(|n| *n)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.constants.get(name).cloned()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/forth/env.rs:117:24
[INFO] [stderr]     |
[INFO] [stderr] 117 |             let val = *self.specials.get(name).unwrap();
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&self.specials[name]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/forth/env.rs:139:23
[INFO] [stderr]     |
[INFO] [stderr] 139 |             let var = self.vars.get(name).unwrap().clone();
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&self.vars[name]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/forth/inter.rs:14:41
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let tokens: Vec<_> = expr.split(" ").map(|s| s.trim().to_string()).collect();
[INFO] [stderr]    |                                         ^^^ help: try using a char instead: `' '`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/forth/inter.rs:62:23
[INFO] [stderr]    |
[INFO] [stderr] 62 |             let opr = self.builtins.get(op).unwrap();
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&self.builtins[op]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/forth/inter.rs:190:33
[INFO] [stderr]     |
[INFO] [stderr] 190 |             while let Some(s) = toks.next() {
[INFO] [stderr]     |                                 ^^^^^^^^^^^ help: try: `for s in toks { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_on_iterator)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]    --> src/forth/inter.rs:191:20
[INFO] [stderr]     |
[INFO] [stderr] 191 |                 if s == &";" {
[INFO] [stderr]     |                    ^^^^^----
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: use the right value directly: `";"`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:200:13
[INFO] [stderr]     |
[INFO] [stderr] 200 |         Err(format!("Invalid function"))
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Invalid function".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/forth/inter.rs:206:29
[INFO] [stderr]     |
[INFO] [stderr] 206 |         while let Some(m) = toks.next() {
[INFO] [stderr]     |                             ^^^^^^^^^^^ help: try: `for m in toks { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/forth/inter.rs:210:28
[INFO] [stderr]     |
[INFO] [stderr] 210 |             if m.ends_with("\"") {
[INFO] [stderr]     |                            ^^^^ help: try using a char instead: `'\"'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:219:13
[INFO] [stderr]     |
[INFO] [stderr] 219 |         Err(format!("Nonterminated string"))
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Nonterminated string".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/forth/inter.rs:230:29
[INFO] [stderr]     |
[INFO] [stderr] 230 |         while let Some(t) = toks.next() {
[INFO] [stderr]     |                             ^^^^^^^^^^^ help: try: `for t in toks { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:372:35
[INFO] [stderr]     |
[INFO] [stderr] 372 |                     match env.pop(format!("Stack empty to set slot value for array")) {
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Stack empty to set slot value for array".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:390:38
[INFO] [stderr]     |
[INFO] [stderr] 390 |                 let length = env.pop(format!("Stack empty to allot array"))?;
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Stack empty to allot array".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:395:25
[INFO] [stderr]     |
[INFO] [stderr] 395 |             None => Err(format!("No variable found to allocate as an array!")),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"No variable found to allocate as an array!".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:402:17
[INFO] [stderr]     |
[INFO] [stderr] 402 |         env.top(format!("Empty stack to evaluate cells"))?;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack to evaluate cells".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:416:17
[INFO] [stderr]     |
[INFO] [stderr] 416 |             Err(format!("Variable name not found"))
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Variable name not found".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/forth/inter.rs:424:29
[INFO] [stderr]     |
[INFO] [stderr] 424 |         while let Some(t) = toks.next() {
[INFO] [stderr]     |                             ^^^^^^^^^^^ help: try: `for t in toks { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:432:24
[INFO] [stderr]     |
[INFO] [stderr] 432 |             return Err(format!("Empty loop body"));
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty loop body".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:435:29
[INFO] [stderr]     |
[INFO] [stderr] 435 |         let start = env.pop(format!("Empty stack for start of do loop"))?;
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for start of do loop".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:436:27
[INFO] [stderr]     |
[INFO] [stderr] 436 |         let end = env.pop(format!("Empty stack for end of do loop"))?;
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for end of do loop".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:454:17
[INFO] [stderr]     |
[INFO] [stderr] 454 |             Err(format!("Variable name not found"))
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Variable name not found".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:462:37
[INFO] [stderr]     |
[INFO] [stderr] 462 |                     let x = env.pop(format!("Stack empty to set variable value"))?;
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Stack empty to set variable value".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:469:37
[INFO] [stderr]     |
[INFO] [stderr] 469 |                     let x = env.pop(format!("Stack empty to set array value"))?;
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Stack empty to set array value".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/forth/inter.rs:471:28
[INFO] [stderr]     |
[INFO] [stderr] 471 |                       if let Some(_) = env.get_variable(&var_name) {
[INFO] [stderr]     |  _____________________-      ^^^^^^^
[INFO] [stderr] 472 | |                         match env.array_set(&var_name, pos, x) {
[INFO] [stderr] 473 | |                             Ok(()) => Ok(()),
[INFO] [stderr] 474 | |                             Err(e) => Err(format!(
[INFO] [stderr] ...   |
[INFO] [stderr] 480 | |                         Err(format!("No such array: {}", var_name))
[INFO] [stderr] 481 | |                     }
[INFO] [stderr]     | |_____________________- help: try this: `if env.get_variable(&var_name).is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:484:25
[INFO] [stderr]     |
[INFO] [stderr] 484 |             None => Err(format!("No variable reference found to set value")),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"No variable reference found to set value".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:512:25
[INFO] [stderr]     |
[INFO] [stderr] 512 |             None => Err(format!("No variable reference found to set value")),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"No variable reference found to set value".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:43:21
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let x = env.pop(format!("Empty stack for dup"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for dup".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:50:21
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let x = env.pop(format!("Empty stack for ."))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for .".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:56:21
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let x = env.pop(format!("Empty stack for first element in swap"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for first element in swap".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:57:21
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let y = env.pop(format!("Empty stack for second element in swap"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for second element in swap".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:64:21
[INFO] [stderr]    |
[INFO] [stderr] 64 |     let x = env.pop(format!("Empty stack for first element in over"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for first element in over".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:65:21
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let y = env.pop(format!("Empty stack for second element in over"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for second element in over".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let x = env.pop(format!("Empty stack for first element in rot"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for first element in rot".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:74:21
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let y = env.pop(format!("Empty stack for second element in rot"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for second element in rot".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:75:21
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let z = env.pop(format!("Empty stack for third element in rot"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for third element in rot".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:83:13
[INFO] [stderr]    |
[INFO] [stderr] 83 |     env.pop(format!("Empty stack for drop"))?;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for drop".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:88:21
[INFO] [stderr]    |
[INFO] [stderr] 88 |     let x = env.pop(format!("Empty stack for emit"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for emit".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/ops.rs:155:21
[INFO] [stderr]     |
[INFO] [stderr] 155 |     let x = env.pop(format!("Empty stack for invert"))?;
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for invert".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]  --> src/forth/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | /     match name.parse::<i32>() {
[INFO] [stderr] 7 | |         Ok(_) => false,
[INFO] [stderr] 8 | |         Err(_) => true,
[INFO] [stderr] 9 | |     }
[INFO] [stderr]   | |_____^ help: try this: `name.parse::<i32>().is_err()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]   --> src/forth/env.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |         self.vars.get(name).map(|v| v.clone())
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.vars.get(name).cloned()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]   --> src/forth/env.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |         self.constants.get(name).map(|n| *n)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.constants.get(name).cloned()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/forth/env.rs:117:24
[INFO] [stderr]     |
[INFO] [stderr] 117 |             let val = *self.specials.get(name).unwrap();
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&self.specials[name]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/forth/env.rs:139:23
[INFO] [stderr]     |
[INFO] [stderr] 139 |             let var = self.vars.get(name).unwrap().clone();
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&self.vars[name]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/forth/inter.rs:14:41
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let tokens: Vec<_> = expr.split(" ").map(|s| s.trim().to_string()).collect();
[INFO] [stderr]    |                                         ^^^ help: try using a char instead: `' '`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/forth/inter.rs:62:23
[INFO] [stderr]    |
[INFO] [stderr] 62 |             let opr = self.builtins.get(op).unwrap();
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&self.builtins[op]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/forth/inter.rs:190:33
[INFO] [stderr]     |
[INFO] [stderr] 190 |             while let Some(s) = toks.next() {
[INFO] [stderr]     |                                 ^^^^^^^^^^^ help: try: `for s in toks { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_on_iterator)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]    --> src/forth/inter.rs:191:20
[INFO] [stderr]     |
[INFO] [stderr] 191 |                 if s == &";" {
[INFO] [stderr]     |                    ^^^^^----
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: use the right value directly: `";"`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:200:13
[INFO] [stderr]     |
[INFO] [stderr] 200 |         Err(format!("Invalid function"))
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Invalid function".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/forth/inter.rs:206:29
[INFO] [stderr]     |
[INFO] [stderr] 206 |         while let Some(m) = toks.next() {
[INFO] [stderr]     |                             ^^^^^^^^^^^ help: try: `for m in toks { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/forth/inter.rs:210:28
[INFO] [stderr]     |
[INFO] [stderr] 210 |             if m.ends_with("\"") {
[INFO] [stderr]     |                            ^^^^ help: try using a char instead: `'\"'`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:219:13
[INFO] [stderr]     |
[INFO] [stderr] 219 |         Err(format!("Nonterminated string"))
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Nonterminated string".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/forth/inter.rs:230:29
[INFO] [stderr]     |
[INFO] [stderr] 230 |         while let Some(t) = toks.next() {
[INFO] [stderr]     |                             ^^^^^^^^^^^ help: try: `for t in toks { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:372:35
[INFO] [stderr]     |
[INFO] [stderr] 372 |                     match env.pop(format!("Stack empty to set slot value for array")) {
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Stack empty to set slot value for array".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:390:38
[INFO] [stderr]     |
[INFO] [stderr] 390 |                 let length = env.pop(format!("Stack empty to allot array"))?;
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Stack empty to allot array".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:395:25
[INFO] [stderr]     |
[INFO] [stderr] 395 |             None => Err(format!("No variable found to allocate as an array!")),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"No variable found to allocate as an array!".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:402:17
[INFO] [stderr]     |
[INFO] [stderr] 402 |         env.top(format!("Empty stack to evaluate cells"))?;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack to evaluate cells".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:416:17
[INFO] [stderr]     |
[INFO] [stderr] 416 |             Err(format!("Variable name not found"))
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Variable name not found".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `for` loop
[INFO] [stderr]    --> src/forth/inter.rs:424:29
[INFO] [stderr]     |
[INFO] [stderr] 424 |         while let Some(t) = toks.next() {
[INFO] [stderr]     |                             ^^^^^^^^^^^ help: try: `for t in toks { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_on_iterator
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:432:24
[INFO] [stderr]     |
[INFO] [stderr] 432 |             return Err(format!("Empty loop body"));
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty loop body".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:435:29
[INFO] [stderr]     |
[INFO] [stderr] 435 |         let start = env.pop(format!("Empty stack for start of do loop"))?;
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for start of do loop".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:436:27
[INFO] [stderr]     |
[INFO] [stderr] 436 |         let end = env.pop(format!("Empty stack for end of do loop"))?;
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for end of do loop".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:454:17
[INFO] [stderr]     |
[INFO] [stderr] 454 |             Err(format!("Variable name not found"))
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Variable name not found".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:462:37
[INFO] [stderr]     |
[INFO] [stderr] 462 |                     let x = env.pop(format!("Stack empty to set variable value"))?;
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Stack empty to set variable value".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:469:37
[INFO] [stderr]     |
[INFO] [stderr] 469 |                     let x = env.pop(format!("Stack empty to set array value"))?;
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Stack empty to set array value".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/forth/inter.rs:471:28
[INFO] [stderr]     |
[INFO] [stderr] 471 |                       if let Some(_) = env.get_variable(&var_name) {
[INFO] [stderr]     |  _____________________-      ^^^^^^^
[INFO] [stderr] 472 | |                         match env.array_set(&var_name, pos, x) {
[INFO] [stderr] 473 | |                             Ok(()) => Ok(()),
[INFO] [stderr] 474 | |                             Err(e) => Err(format!(
[INFO] [stderr] ...   |
[INFO] [stderr] 480 | |                         Err(format!("No such array: {}", var_name))
[INFO] [stderr] 481 | |                     }
[INFO] [stderr]     | |_____________________- help: try this: `if env.get_variable(&var_name).is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:484:25
[INFO] [stderr]     |
[INFO] [stderr] 484 |             None => Err(format!("No variable reference found to set value")),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"No variable reference found to set value".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/inter.rs:512:25
[INFO] [stderr]     |
[INFO] [stderr] 512 |             None => Err(format!("No variable reference found to set value")),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"No variable reference found to set value".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:43:21
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let x = env.pop(format!("Empty stack for dup"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for dup".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:50:21
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let x = env.pop(format!("Empty stack for ."))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for .".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:56:21
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let x = env.pop(format!("Empty stack for first element in swap"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for first element in swap".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:57:21
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let y = env.pop(format!("Empty stack for second element in swap"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for second element in swap".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:64:21
[INFO] [stderr]    |
[INFO] [stderr] 64 |     let x = env.pop(format!("Empty stack for first element in over"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for first element in over".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:65:21
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let y = env.pop(format!("Empty stack for second element in over"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for second element in over".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let x = env.pop(format!("Empty stack for first element in rot"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for first element in rot".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:74:21
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let y = env.pop(format!("Empty stack for second element in rot"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for second element in rot".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:75:21
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let z = env.pop(format!("Empty stack for third element in rot"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for third element in rot".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:83:13
[INFO] [stderr]    |
[INFO] [stderr] 83 |     env.pop(format!("Empty stack for drop"))?;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for drop".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/forth/ops.rs:88:21
[INFO] [stderr]    |
[INFO] [stderr] 88 |     let x = env.pop(format!("Empty stack for emit"))?;
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for emit".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/forth/ops.rs:155:21
[INFO] [stderr]     |
[INFO] [stderr] 155 |     let x = env.pop(format!("Empty stack for invert"))?;
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"Empty stack for invert".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_err()`
[INFO] [stderr]  --> src/forth/mod.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | /     match name.parse::<i32>() {
[INFO] [stderr] 7 | |         Ok(_) => false,
[INFO] [stderr] 8 | |         Err(_) => true,
[INFO] [stderr] 9 | |     }
[INFO] [stderr]   | |_____^ help: try this: `name.parse::<i32>().is_err()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "0fd373e266ccf2467fcfa6d185aa776bfdcc48ae542fabd731cd6be259ca38d5"`
[INFO] running `"docker" "rm" "-f" "0fd373e266ccf2467fcfa6d185aa776bfdcc48ae542fabd731cd6be259ca38d5"`
[INFO] [stdout] 0fd373e266ccf2467fcfa6d185aa776bfdcc48ae542fabd731cd6be259ca38d5