Compiling with --test yields an explicit mode warning on the first token #3633
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Description
Compiling any code[1][3] with the --test flag spits out a warning[2][4] on the first token it finds.
[1] test.rs
extern mod std;
pure fn bigger_than(x: int, y: int) -> bool {
return x > y
}
#[test]
fn t1() {
assert bigger_than(5, 3) == true;
}
#[test]
#[should_fail]
fn t2() {
assert bigger_than(3, 5) == true;
}
[2] rustc output
λ rustc --test test.rs
test.rs:1:0: 1:0 warning: argument 1 uses an explicit mode
test.rs:1 extern mod std;
^
[3] test2.rs
//
extern mod std;
[4] rustc output
λ rustc --test test2.rs
test2.rs:1:0: 1:0 warning: argument 1 uses an explicit mode
test2.rs:1 //
^
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