3 files changed, 34 insertions, 1 deletions
diff --git a/src/test/ui/proc-macro/auxiliary/test-macros.rs b/src/test/ui/proc-macro/auxiliary/test-macros.rs
index 1a500361640..7a46aee462b 100644
--- a/src/test/ui/proc-macro/auxiliary/test-macros.rs
+++ b/src/test/ui/proc-macro/auxiliary/test-macros.rs
@@ -83,21 +83,52 @@ fn print_helper(input: TokenStream, kind: &str) -> TokenStream {
     print_helper_ext(input, kind, true)
 }
 
+fn deep_recollect(input: TokenStream) -> TokenStream {
+    input.into_iter().map(|tree| {
+        match tree {
+            TokenTree::Group(group) => {
+                let inner = deep_recollect(group.stream());
+                let mut new_group = TokenTree::Group(
+                    proc_macro::Group::new(group.delimiter(), inner)
+                );
+                new_group.set_span(group.span());
+                new_group
+            }
+            _ => tree,
+        }
+    }).collect()
+}
+
 fn print_helper_ext(input: TokenStream, kind: &str, debug: bool) -> TokenStream {
     let input_display = format!("{}", input);
     let input_debug = format!("{:#?}", input);
-    let recollected = input.into_iter().collect();
+    let recollected = input.clone().into_iter().collect();
     let recollected_display = format!("{}", recollected);
     let recollected_debug = format!("{:#?}", recollected);
+
+    let deep_recollected = deep_recollect(input);
+    let deep_recollected_display = format!("{}", deep_recollected);
+    let deep_recollected_debug = format!("{:#?}", deep_recollected);
+
+
+
     println!("PRINT-{} INPUT (DISPLAY): {}", kind, input_display);
     if recollected_display != input_display {
         println!("PRINT-{} RE-COLLECTED (DISPLAY): {}", kind, recollected_display);
     }
+
+    if deep_recollected_display != recollected_display {
+        println!("PRINT-{} DEEP-RE-COLLECTED (DISPLAY): {}", kind, deep_recollected_display);
+    }
+
     if debug {
         println!("PRINT-{} INPUT (DEBUG): {}", kind, input_debug);
         if recollected_debug != input_debug {
             println!("PRINT-{} RE-COLLECTED (DEBUG): {}", kind, recollected_debug);
         }
+        if deep_recollected_debug != recollected_debug {
+            println!("PRINT-{} DEEP-RE-COLLETED (DEBUG): {}", kind, deep_recollected_debug);
+        }
     }
     recollected
 }
diff --git a/src/test/ui/proc-macro/issue-78675-captured-inner-attrs.stdout b/src/test/ui/proc-macro/issue-78675-captured-inner-attrs.stdout
index 40da5aa93bf..9b467a5970b 100644
--- a/src/test/ui/proc-macro/issue-78675-captured-inner-attrs.stdout
+++ b/src/test/ui/proc-macro/issue-78675-captured-inner-attrs.stdout
@@ -1,6 +1,7 @@
 PRINT-BANG INPUT (DISPLAY): foo ! { #[fake_attr] mod bar {
     #![doc = r" Foo"]
 } }
+PRINT-BANG DEEP-RE-COLLECTED (DISPLAY): foo ! { #[fake_attr] mod bar { # ! [doc = r" Foo"] } }
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Ident {
         ident: "foo",
diff --git a/src/test/ui/proc-macro/nodelim-groups.stdout b/src/test/ui/proc-macro/nodelim-groups.stdout
index 6b410f0bfb7..4ffe3f35e8e 100644
--- a/src/test/ui/proc-macro/nodelim-groups.stdout
+++ b/src/test/ui/proc-macro/nodelim-groups.stdout
@@ -71,6 +71,7 @@ PRINT-BANG INPUT (DEBUG): TokenStream [
     },
 ]
 PRINT-BANG INPUT (DISPLAY): "hi" "hello".len() + "world".len() (1 + 1)
+PRINT-BANG DEEP-RE-COLLECTED (DISPLAY): "hi" "hello" . len() + "world" . len() (1 + 1)
 PRINT-BANG INPUT (DEBUG): TokenStream [
     Literal {
         kind: Str,