When pretty printing, name placeholders as bound regions

2021-07-18 03:18:05 -04:00
parent eb0b95b55a
commit b9ee2fb6d8
8 changed files with 118 additions and 46 deletions
--- a/compiler/rustc_infer/src/infer/error_reporting/mod.rs
+++ b/compiler/rustc_infer/src/infer/error_reporting/mod.rs
@@ -995,7 +995,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
        let get_lifetimes = |sig| {
            use rustc_hir::def::Namespace;
            let mut s = String::new();
-            let (_, (sig, reg)) = ty::print::FmtPrinter::new(self.tcx, &mut s, Namespace::TypeNS)
+            let (_, sig, reg) = ty::print::FmtPrinter::new(self.tcx, &mut s, Namespace::TypeNS)
                .name_all_regions(sig)
                .unwrap();
            let lts: Vec<String> = reg.into_iter().map(|(_, kind)| kind.to_string()).collect();