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When an associated type with GATs isn't specified in a `dyn Trait`, emit an object safety error instead of only complaining about the missing associated type, as it will lead the user down a path of three different errors before letting them know that what they were trying to do is impossible to begin with. Fix #103155.
13 lines
360 B
Rust
13 lines
360 B
Rust
use std::any::Any;
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fn main()
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{
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fn h(x:i32) -> i32 {3*x}
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let mut vfnfer:Vec<Box<dyn Any>> = vec![];
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vfnfer.push(Box::new(h));
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println!("{:?}",(vfnfer[0] as dyn Fn)(3));
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//~^ ERROR the precise format of `Fn`-family traits'
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//~| ERROR missing generics for trait `Fn`
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//~| ERROR the value of the associated type `Output` in `FnOnce`
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}
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