error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:83:13 | LL | let _ = opt.unwrap_or_else(|| 2); | ^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::unnecessary-lazy-evaluations` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::unnecessary_lazy_evaluations)]` help: use `unwrap_or` instead | LL - let _ = opt.unwrap_or_else(|| 2); LL + let _ = opt.unwrap_or(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:85:13 | LL | let _ = opt.unwrap_or_else(|| astronomers_pi); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = opt.unwrap_or_else(|| astronomers_pi); LL + let _ = opt.unwrap_or(astronomers_pi); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:87:13 | LL | let _ = opt.unwrap_or_else(|| ext_str.some_field); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = opt.unwrap_or_else(|| ext_str.some_field); LL + let _ = opt.unwrap_or(ext_str.some_field); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:90:13 | LL | let _ = opt.and_then(|_| ext_opt); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `and` instead | LL - let _ = opt.and_then(|_| ext_opt); LL + let _ = opt.and(ext_opt); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:92:13 | LL | let _ = opt.or_else(|| ext_opt); | ^^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _ = opt.or_else(|| ext_opt); LL + let _ = opt.or(ext_opt); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:94:13 | LL | let _ = opt.or_else(|| None); | ^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _ = opt.or_else(|| None); LL + let _ = opt.or(None); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:96:13 | LL | let _ = opt.get_or_insert_with(|| 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `get_or_insert` instead | LL - let _ = opt.get_or_insert_with(|| 2); LL + let _ = opt.get_or_insert(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:98:13 | LL | let _ = opt.ok_or_else(|| 2); | ^^^^^^^^^^^^^^^^^^^^ | help: use `ok_or` instead | LL - let _ = opt.ok_or_else(|| 2); LL + let _ = opt.ok_or(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:100:13 | LL | let _ = nested_tuple_opt.unwrap_or_else(|| Some((1, 2))); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = nested_tuple_opt.unwrap_or_else(|| Some((1, 2))); LL + let _ = nested_tuple_opt.unwrap_or(Some((1, 2))); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:102:13 | LL | let _ = cond.then(|| astronomers_pi); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _ = cond.then(|| astronomers_pi); LL + let _ = cond.then_some(astronomers_pi); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:104:13 | LL | let _ = true.then(|| -> _ {}); | ^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _ = true.then(|| -> _ {}); LL + let _ = true.then_some({}); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:106:13 | LL | let _ = true.then(|| {}); | ^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _ = true.then(|| {}); LL + let _ = true.then_some({}); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:111:13 | LL | let _ = Some(1).unwrap_or_else(|| *r); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = Some(1).unwrap_or_else(|| *r); LL + let _ = Some(1).unwrap_or(*r); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:114:13 | LL | let _ = Some(1).unwrap_or_else(|| *b); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = Some(1).unwrap_or_else(|| *b); LL + let _ = Some(1).unwrap_or(*b); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:117:13 | LL | let _ = Some(1).as_ref().unwrap_or_else(|| &r); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = Some(1).as_ref().unwrap_or_else(|| &r); LL + let _ = Some(1).as_ref().unwrap_or(&r); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:119:13 | LL | let _ = Some(1).as_ref().unwrap_or_else(|| &b); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = Some(1).as_ref().unwrap_or_else(|| &b); LL + let _ = Some(1).as_ref().unwrap_or(&b); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:123:13 | LL | let _ = Some(10).unwrap_or_else(|| 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = Some(10).unwrap_or_else(|| 2); LL + let _ = Some(10).unwrap_or(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:125:13 | LL | let _ = Some(10).and_then(|_| ext_opt); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `and` instead | LL - let _ = Some(10).and_then(|_| ext_opt); LL + let _ = Some(10).and(ext_opt); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:127:28 | LL | let _: Option = None.or_else(|| ext_opt); | ^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _: Option = None.or_else(|| ext_opt); LL + let _: Option = None.or(ext_opt); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:129:13 | LL | let _ = None.get_or_insert_with(|| 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `get_or_insert` instead | LL - let _ = None.get_or_insert_with(|| 2); LL + let _ = None.get_or_insert(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:131:35 | LL | let _: Result = None.ok_or_else(|| 2); | ^^^^^^^^^^^^^^^^^^^^^ | help: use `ok_or` instead | LL - let _: Result = None.ok_or_else(|| 2); LL + let _: Result = None.ok_or(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:133:28 | LL | let _: Option = None.or_else(|| None); | ^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _: Option = None.or_else(|| None); LL + let _: Option = None.or(None); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:137:13 | LL | let _ = deep.0.unwrap_or_else(|| 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = deep.0.unwrap_or_else(|| 2); LL + let _ = deep.0.unwrap_or(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:139:13 | LL | let _ = deep.0.and_then(|_| ext_opt); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `and` instead | LL - let _ = deep.0.and_then(|_| ext_opt); LL + let _ = deep.0.and(ext_opt); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:141:13 | LL | let _ = deep.0.or_else(|| None); | ^^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _ = deep.0.or_else(|| None); LL + let _ = deep.0.or(None); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:143:13 | LL | let _ = deep.0.get_or_insert_with(|| 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `get_or_insert` instead | LL - let _ = deep.0.get_or_insert_with(|| 2); LL + let _ = deep.0.get_or_insert(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:145:13 | LL | let _ = deep.0.ok_or_else(|| 2); | ^^^^^^^^^^^^^^^^^^^^^^^ | help: use `ok_or` instead | LL - let _ = deep.0.ok_or_else(|| 2); LL + let _ = deep.0.ok_or(2); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:177:28 | LL | let _: Option = None.or_else(|| Some(3)); | ^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _: Option = None.or_else(|| Some(3)); LL + let _: Option = None.or(Some(3)); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:179:13 | LL | let _ = deep.0.or_else(|| Some(3)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _ = deep.0.or_else(|| Some(3)); LL + let _ = deep.0.or(Some(3)); | error: unnecessary closure used to substitute value for `Option::None` --> tests/ui/unnecessary_lazy_eval.rs:181:13 | LL | let _ = opt.or_else(|| Some(3)); | ^^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _ = opt.or_else(|| Some(3)); LL + let _ = opt.or(Some(3)); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:188:13 | LL | let _ = res2.unwrap_or_else(|_| 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = res2.unwrap_or_else(|_| 2); LL + let _ = res2.unwrap_or(2); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:190:13 | LL | let _ = res2.unwrap_or_else(|_| astronomers_pi); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = res2.unwrap_or_else(|_| astronomers_pi); LL + let _ = res2.unwrap_or(astronomers_pi); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:192:13 | LL | let _ = res2.unwrap_or_else(|_| ext_str.some_field); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `unwrap_or` instead | LL - let _ = res2.unwrap_or_else(|_| ext_str.some_field); LL + let _ = res2.unwrap_or(ext_str.some_field); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:215:35 | LL | let _: Result = res.and_then(|_| Err(2)); | ^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `and` instead | LL - let _: Result = res.and_then(|_| Err(2)); LL + let _: Result = res.and(Err(2)); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:217:35 | LL | let _: Result = res.and_then(|_| Err(astronomers_pi)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `and` instead | LL - let _: Result = res.and_then(|_| Err(astronomers_pi)); LL + let _: Result = res.and(Err(astronomers_pi)); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:219:35 | LL | let _: Result = res.and_then(|_| Err(ext_str.some_field)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `and` instead | LL - let _: Result = res.and_then(|_| Err(ext_str.some_field)); LL + let _: Result = res.and(Err(ext_str.some_field)); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:222:35 | LL | let _: Result = res.or_else(|_| Ok(2)); | ^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _: Result = res.or_else(|_| Ok(2)); LL + let _: Result = res.or(Ok(2)); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:224:35 | LL | let _: Result = res.or_else(|_| Ok(astronomers_pi)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _: Result = res.or_else(|_| Ok(astronomers_pi)); LL + let _: Result = res.or(Ok(astronomers_pi)); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:226:35 | LL | let _: Result = res.or_else(|_| Ok(ext_str.some_field)); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `or` instead | LL - let _: Result = res.or_else(|_| Ok(ext_str.some_field)); LL + let _: Result = res.or(Ok(ext_str.some_field)); | error: unnecessary closure used to substitute value for `Result::Err` --> tests/ui/unnecessary_lazy_eval.rs:228:35 | LL | let _: Result = res. | ___________________________________^ ... | LL | | or_else(|_| Ok(ext_str.some_field)); | |_______________________________________^ | help: use `or` instead | LL - or_else(|_| Ok(ext_str.some_field)); LL + or(Ok(ext_str.some_field)); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:259:14 | LL | let _x = false.then(|| i32::MAX + 1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| i32::MAX + 1); LL + let _x = false.then_some(i32::MAX + 1); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:261:14 | LL | let _x = false.then(|| i32::MAX * 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| i32::MAX * 2); LL + let _x = false.then_some(i32::MAX * 2); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:263:14 | LL | let _x = false.then(|| i32::MAX - 1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| i32::MAX - 1); LL + let _x = false.then_some(i32::MAX - 1); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:265:14 | LL | let _x = false.then(|| i32::MIN - 1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| i32::MIN - 1); LL + let _x = false.then_some(i32::MIN - 1); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:267:14 | LL | let _x = false.then(|| (1 + 2 * 3 - 2 / 3 + 9) << 2); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| (1 + 2 * 3 - 2 / 3 + 9) << 2); LL + let _x = false.then_some((1 + 2 * 3 - 2 / 3 + 9) << 2); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:269:14 | LL | let _x = false.then(|| 255u8 << 7); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| 255u8 << 7); LL + let _x = false.then_some(255u8 << 7); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:271:14 | LL | let _x = false.then(|| 255u8 << 8); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| 255u8 << 8); LL + let _x = false.then_some(255u8 << 8); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:273:14 | LL | let _x = false.then(|| 255u8 >> 8); | ^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| 255u8 >> 8); LL + let _x = false.then_some(255u8 >> 8); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:276:14 | LL | let _x = false.then(|| i32::MAX + -1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| i32::MAX + -1); LL + let _x = false.then_some(i32::MAX + -1); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:278:14 | LL | let _x = false.then(|| -i32::MAX); | ^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| -i32::MAX); LL + let _x = false.then_some(-i32::MAX); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:280:14 | LL | let _x = false.then(|| -i32::MIN); | ^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| -i32::MIN); LL + let _x = false.then_some(-i32::MIN); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:283:14 | LL | let _x = false.then(|| 255 >> -7); | ^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| 255 >> -7); LL + let _x = false.then_some(255 >> -7); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:285:14 | LL | let _x = false.then(|| 255 << -1); | ^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| 255 << -1); LL + let _x = false.then_some(255 << -1); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:287:14 | LL | let _x = false.then(|| 1 / 0); | ^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| 1 / 0); LL + let _x = false.then_some(1 / 0); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:289:14 | LL | let _x = false.then(|| x << -1); | ^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| x << -1); LL + let _x = false.then_some(x << -1); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:291:14 | LL | let _x = false.then(|| x << 2); | ^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| x << 2); LL + let _x = false.then_some(x << 2); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:301:14 | LL | let _x = false.then(|| x / 0); | ^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| x / 0); LL + let _x = false.then_some(x / 0); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:303:14 | LL | let _x = false.then(|| x % 0); | ^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| x % 0); LL + let _x = false.then_some(x % 0); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:306:14 | LL | let _x = false.then(|| 1 / -1); | ^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| 1 / -1); LL + let _x = false.then_some(1 / -1); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:308:14 | LL | let _x = false.then(|| i32::MIN / -1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| i32::MIN / -1); LL + let _x = false.then_some(i32::MIN / -1); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:311:14 | LL | let _x = false.then(|| i32::MIN / 0); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| i32::MIN / 0); LL + let _x = false.then_some(i32::MIN / 0); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:313:14 | LL | let _x = false.then(|| 4 / 2); | ^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| 4 / 2); LL + let _x = false.then_some(4 / 2); | error: unnecessary closure used with `bool::then` --> tests/ui/unnecessary_lazy_eval.rs:321:14 | LL | let _x = false.then(|| f1 + f2); | ^^^^^^^^^^^^^^^^^^^^^^ | help: use `then_some` instead | LL - let _x = false.then(|| f1 + f2); LL + let _x = false.then_some(f1 + f2); | error: aborting due to 63 previous errors