| // run-pass |
| |
| // This code used to produce the following ICE: |
| // |
| // error: internal compiler error: get_unique_type_id_of_type() - |
| // unexpected type: closure, |
| // Closure(rustc_ast::ast::DefId{krate: 0, node: 66}, |
| // ReScope(63)) |
| // |
| // This is a regression test for issue #17021. |
| // |
| // compile-flags: -g |
| // ignore-asmjs wasm2js does not support source maps yet |
| |
| use std::ptr; |
| |
| pub fn replace_map<'a, T, F>(src: &mut T, prod: F) where F: FnOnce(T) -> T { |
| unsafe { *src = prod(ptr::read(src as *mut T as *const T)); } |
| } |
| |
| pub fn main() { |
| let mut a = 7; |
| let b = &mut a; |
| replace_map(b, |x: usize| x * 2); |
| assert_eq!(*b, 14); |
| } |
