Explain unusual debugging code in librustc

Introduced in #47828 to help track down some bugs, it landed a bit hastily so
this is intended on cleaning it up a bit.
This commit is contained in:
Alex Crichton 2018-02-10 07:03:35 -08:00
parent 39abcc0413
commit 3a967676f8

View File

@ -1026,9 +1026,14 @@ fn import_path_to_string(names: &[SpannedIdent],
if names.is_empty() {
import_directive_subclass_to_string(subclass)
} else {
let x = format!("{}::{}",
names_to_string(names),
import_directive_subclass_to_string(subclass));
// Note that this code looks a little wonky, it's currently here to
// hopefully help debug #48116, but otherwise isn't intended to
// cause any problems.
let x = format!(
"{}::{}",
names_to_string(names),
import_directive_subclass_to_string(subclass),
);
assert!(!names.is_empty());
assert!(!x.starts_with("::"));
return x