1  Error [EAST0372017]: The name `f1` is defined multiple times.
2      --> compiler-test:9:14
3       |
4     4 |       function f1(a: u8) -> u8 {
5       |                ^^ previous definition of `f1` here
6     ...
7     9 |       function f1(a: u8) -> u8 {
8       |                ^^ `f1` redefined here