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edafbaffb2
- Either explicitly annotate `let x: () = expr;` where `x` has unit type, or remove the unit binding to leave only `expr;` instead. - Fix disjoint-capture-in-same-closure test
53 lines
1.4 KiB
Rust
53 lines
1.4 KiB
Rust
// revisions: noopt opt opt_with_overflow_checks
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//[noopt]compile-flags: -C opt-level=0
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//[opt]compile-flags: -O
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//[opt_with_overflow_checks]compile-flags: -C overflow-checks=on -O
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// build-pass
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// ignore-pass (test emits codegen-time warnings and verifies that they are not errors)
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//! This test ensures that when we promote code that fails to evaluate, the build still succeeds.
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#![warn(arithmetic_overflow, unconditional_panic)]
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// The only way to have promoteds that fail is in `const fn` called from `const`/`static`.
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const fn overflow() -> u32 {
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0 - 1
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//~^ WARN this arithmetic operation will overflow
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}
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const fn div_by_zero1() -> i32 {
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1 / 0
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//~^ WARN this operation will panic at runtime
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}
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const fn div_by_zero2() -> i32 {
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1 / (1 - 1)
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//~^ WARN this operation will panic at runtime
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}
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const fn div_by_zero3() -> i32 {
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1 / (false as i32)
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//~^ WARN this operation will panic at runtime
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}
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const fn oob() -> i32 {
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[1, 2, 3][4]
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//~^ WARN this operation will panic at runtime
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}
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const fn mk_false() -> bool { false }
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// An actually used constant referencing failing promoteds in dead code.
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// This needs to always work.
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const Y: () = {
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if mk_false() {
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let _x: &'static u32 = &overflow();
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let _x: &'static i32 = &div_by_zero1();
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let _x: &'static i32 = &div_by_zero2();
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let _x: &'static i32 = &div_by_zero3();
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let _x: &'static i32 = &oob();
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}
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()
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};
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fn main() {
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Y;
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}
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