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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/issues/issue-59494.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-59494.rs b/src/test/ui/issues/issue-59494.rs new file mode 100644 index 000000000..a53e28f72 --- /dev/null +++ b/src/test/ui/issues/issue-59494.rs @@ -0,0 +1,23 @@ +fn t7p<A, B, C>(f: impl Fn(B) -> C, g: impl Fn(A) -> B) -> impl Fn(A) -> C { + move |a: A| -> C { f(g(a)) } +} + +fn t8n<A, B, C>(f: impl Fn(A) -> B, g: impl Fn(A) -> C) -> impl Fn(A) -> (B, C) +where + A: Copy, +{ + move |a: A| -> (B, C) { + let b = a; + let fa = f(a); + let ga = g(b); + (fa, ga) + } +} + +fn main() { + let f = |(_, _)| {}; + let g = |(a, _)| a; + let t7 = |env| |a| |b| t7p(f, g)(((env, a), b)); + let t8 = t8n(t7, t7p(f, g)); + //~^ ERROR: expected a `Fn<(_,)>` closure, found `impl Fn(((_, _), _))` [E0277] +} |