3 files changed, 11 insertions, 11 deletions
diff --git a/compiler/rustc_middle/src/mir/pretty.rs b/compiler/rustc_middle/src/mir/pretty.rs
index 632f159a7a8..da3ab1b2a57 100644
--- a/compiler/rustc_middle/src/mir/pretty.rs
+++ b/compiler/rustc_middle/src/mir/pretty.rs
@@ -990,11 +990,11 @@ impl<'tcx> Debug for Rvalue<'tcx> {
                     AggregateKind::Closure(def_id, args) => ty::tls::with(|tcx| {
                         let name = if tcx.sess.opts.unstable_opts.span_free_formats {
                             let args = tcx.lift(args).unwrap();
-                            format!("[closure@{}]", tcx.def_path_str_with_args(def_id, args),)
+                            format!("{{closure@{}}}", tcx.def_path_str_with_args(def_id, args),)
                         } else {
                             let span = tcx.def_span(def_id);
                             format!(
-                                "[closure@{}]",
+                                "{{closure@{}}}",
                                 tcx.sess.source_map().span_to_diagnostic_string(span)
                             )
                         };
@@ -1018,7 +1018,7 @@ impl<'tcx> Debug for Rvalue<'tcx> {
                     }),
 
                     AggregateKind::Generator(def_id, _, _) => ty::tls::with(|tcx| {
-                        let name = format!("[generator@{:?}]", tcx.def_span(def_id));
+                        let name = format!("{{generator@{:?}}}", tcx.def_span(def_id));
                         let mut struct_fmt = fmt.debug_struct(&name);
 
                         // FIXME(project-rfc-2229#48): This should be a list of capture names/places
diff --git a/compiler/rustc_middle/src/ty/print/pretty.rs b/compiler/rustc_middle/src/ty/print/pretty.rs
index 0ee63e92848..5b833dde92c 100644
--- a/compiler/rustc_middle/src/ty/print/pretty.rs
+++ b/compiler/rustc_middle/src/ty/print/pretty.rs
@@ -795,7 +795,7 @@ pub trait PrettyPrinter<'tcx>:
             }
             ty::Str => p!("str"),
             ty::Generator(did, args, movability) => {
-                p!(write("["));
+                p!(write("{{"));
                 let generator_kind = self.tcx().generator_kind(did).unwrap();
                 let should_print_movability =
                     self.should_print_verbose() || generator_kind == hir::GeneratorKind::Gen;
@@ -836,13 +836,13 @@ pub trait PrettyPrinter<'tcx>:
                     }
                 }
 
-                p!("]")
+                p!("}}")
             }
             ty::GeneratorWitness(types) => {
                 p!(in_binder(&types));
             }
             ty::GeneratorWitnessMIR(did, args) => {
-                p!(write("["));
+                p!(write("{{"));
                 if !self.tcx().sess.verbose() {
                     p!("generator witness");
                     // FIXME(eddyb) should use `def_span`.
@@ -861,10 +861,10 @@ pub trait PrettyPrinter<'tcx>:
                     p!(print_def_path(did, args));
                 }
 
-                p!("]")
+                p!("}}")
             }
             ty::Closure(did, args) => {
-                p!(write("["));
+                p!(write("{{"));
                 if !self.should_print_verbose() {
                     p!(write("closure"));
                     // FIXME(eddyb) should use `def_span`.
@@ -904,7 +904,7 @@ pub trait PrettyPrinter<'tcx>:
                         p!(")");
                     }
                 }
-                p!("]");
+                p!("}}");
             }
             ty::Array(ty, sz) => p!("[", print(ty), "; ", print(sz), "]"),
             ty::Slice(ty) => p!("[", print(ty), "]"),
@@ -1061,7 +1061,7 @@ pub trait PrettyPrinter<'tcx>:
                     }
 
                     for (assoc_item_def_id, term) in assoc_items {
-                        // Skip printing `<[generator@] as Generator<_>>::Return` from async blocks,
+                        // Skip printing `<{generator@} as Generator<_>>::Return` from async blocks,
                         // unless we can find out what generator return type it comes from.
                         let term = if let Some(ty) = term.skip_binder().ty()
                             && let ty::Alias(ty::Projection, proj) = ty.kind()
diff --git a/compiler/rustc_middle/src/ty/sty.rs b/compiler/rustc_middle/src/ty/sty.rs
index e3e014a3b2a..3ebb8cbc476 100644
--- a/compiler/rustc_middle/src/ty/sty.rs
+++ b/compiler/rustc_middle/src/ty/sty.rs
@@ -2550,7 +2550,7 @@ impl<'tcx> Ty<'tcx> {
 
     /// Checks whether a type recursively contains any closure
     ///
-    /// Example: `Option<[closure@file.rs:4:20]>` returns true
+    /// Example: `Option<{closure@file.rs:4:20}>` returns true
     pub fn contains_closure(self) -> bool {
         struct ContainsClosureVisitor;