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Mark format! with must_use hint
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2 changed files with 8 additions and 2 deletions
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@ -98,7 +98,7 @@ fn or_fun_call() {
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let opt = Some(1);
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let hello = "Hello";
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let _ = opt.ok_or(format!("{} world.", hello));
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let _ = opt.ok_or_else(|| format!("{} world.", hello));
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// index
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let map = HashMap::<u64, u64>::new();
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@ -100,6 +100,12 @@ error: use of `unwrap_or` to construct default value
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LL | let _ = stringy.unwrap_or(String::new());
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| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
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error: use of `ok_or` followed by a function call
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--> tests/ui/or_fun_call.rs:101:17
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LL | let _ = opt.ok_or(format!("{} world.", hello));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `ok_or_else(|| format!("{} world.", hello))`
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error: use of `unwrap_or` followed by a function call
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--> tests/ui/or_fun_call.rs:105:21
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@ -190,5 +196,5 @@ error: use of `unwrap_or_else` to construct default value
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LL | let _ = stringy.unwrap_or_else(String::new);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
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error: aborting due to 31 previous errors
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error: aborting due to 32 previous errors
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