diff --git a/library/std/src/collections/hash/map.rs b/library/std/src/collections/hash/map.rs
index ed32668456df6..3dcc5cd2b5911 100644
--- a/library/std/src/collections/hash/map.rs
+++ b/library/std/src/collections/hash/map.rs
@@ -1793,7 +1793,7 @@ impl<'a, K, V, S> RawVacantEntryMut<'a, K, V, S> {
 #[unstable(feature = "hash_raw_entry", issue = "56167")]
 impl<K, V, S> Debug for RawEntryBuilderMut<'_, K, V, S> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("RawEntryBuilder").finish()
+        f.debug_struct("RawEntryBuilder").finish_non_exhaustive()
     }
 }
 
@@ -1813,21 +1813,21 @@ impl<K: Debug, V: Debug, S> Debug for RawOccupiedEntryMut<'_, K, V, S> {
         f.debug_struct("RawOccupiedEntryMut")
             .field("key", self.key())
             .field("value", self.get())
-            .finish()
+            .finish_non_exhaustive()
     }
 }
 
 #[unstable(feature = "hash_raw_entry", issue = "56167")]
 impl<K, V, S> Debug for RawVacantEntryMut<'_, K, V, S> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("RawVacantEntryMut").finish()
+        f.debug_struct("RawVacantEntryMut").finish_non_exhaustive()
     }
 }
 
 #[unstable(feature = "hash_raw_entry", issue = "56167")]
 impl<K, V, S> Debug for RawEntryBuilder<'_, K, V, S> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("RawEntryBuilder").finish()
+        f.debug_struct("RawEntryBuilder").finish_non_exhaustive()
     }
 }
 
@@ -1867,7 +1867,10 @@ pub struct OccupiedEntry<'a, K: 'a, V: 'a> {
 #[stable(feature = "debug_hash_map", since = "1.12.0")]
 impl<K: Debug, V: Debug> Debug for OccupiedEntry<'_, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("OccupiedEntry").field("key", self.key()).field("value", self.get()).finish()
+        f.debug_struct("OccupiedEntry")
+            .field("key", self.key())
+            .field("value", self.get())
+            .finish_non_exhaustive()
     }
 }
 
@@ -1903,7 +1906,7 @@ impl<K: Debug, V: Debug> Debug for OccupiedError<'_, K, V> {
             .field("key", self.entry.key())
             .field("old_value", self.entry.get())
             .field("new_value", &self.value)
-            .finish()
+            .finish_non_exhaustive()
     }
 }
 
diff --git a/library/std/src/fs.rs b/library/std/src/fs.rs
index ccbc69a975c32..8da6ced03a8cd 100644
--- a/library/std/src/fs.rs
+++ b/library/std/src/fs.rs
@@ -1154,7 +1154,7 @@ impl fmt::Debug for Metadata {
             .field("modified", &self.modified())
             .field("accessed", &self.accessed())
             .field("created", &self.created())
-            .finish()
+            .finish_non_exhaustive()
     }
 }
 
diff --git a/library/std/src/io/buffered/linewriter.rs b/library/std/src/io/buffered/linewriter.rs
index 502c6e3c6c0b9..d7b620d6f9177 100644
--- a/library/std/src/io/buffered/linewriter.rs
+++ b/library/std/src/io/buffered/linewriter.rs
@@ -227,6 +227,6 @@ where
                 "buffer",
                 &format_args!("{}/{}", self.inner.buffer().len(), self.inner.capacity()),
             )
-            .finish()
+            .finish_non_exhaustive()
     }
 }
diff --git a/library/std/src/lazy.rs b/library/std/src/lazy.rs
index 974851a8bd634..ca86e569bc127 100644
--- a/library/std/src/lazy.rs
+++ b/library/std/src/lazy.rs
@@ -515,7 +515,7 @@ pub struct SyncLazy<T, F = fn() -> T> {
 #[unstable(feature = "once_cell", issue = "74465")]
 impl<T: fmt::Debug, F> fmt::Debug for SyncLazy<T, F> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("Lazy").field("cell", &self.cell).field("init", &"..").finish()
+        f.debug_struct("Lazy").field("cell", &self.cell).finish_non_exhaustive()
     }
 }
 
diff --git a/library/std/src/process.rs b/library/std/src/process.rs
index f9cfd11e90650..5690de681cab9 100644
--- a/library/std/src/process.rs
+++ b/library/std/src/process.rs
@@ -234,7 +234,7 @@ impl fmt::Debug for Child {
             .field("stdin", &self.stdin)
             .field("stdout", &self.stdout)
             .field("stderr", &self.stderr)
-            .finish()
+            .finish_non_exhaustive()
     }
 }
 
diff --git a/library/std/src/sync/mpsc/mod.rs b/library/std/src/sync/mpsc/mod.rs
index b12e7eeb13814..c8f0a6b99fe6b 100644
--- a/library/std/src/sync/mpsc/mod.rs
+++ b/library/std/src/sync/mpsc/mod.rs
@@ -864,7 +864,7 @@ impl<T> Drop for Sender<T> {
 #[stable(feature = "mpsc_debug", since = "1.8.0")]
 impl<T> fmt::Debug for Sender<T> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("Sender").finish()
+        f.debug_struct("Sender").finish_non_exhaustive()
     }
 }
 
@@ -991,7 +991,7 @@ impl<T> Drop for SyncSender<T> {
 #[stable(feature = "mpsc_debug", since = "1.8.0")]
 impl<T> fmt::Debug for SyncSender<T> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("SyncSender").finish()
+        f.debug_struct("SyncSender").finish_non_exhaustive()
     }
 }
 
@@ -1470,7 +1470,7 @@ impl<T> Drop for Receiver<T> {
 #[stable(feature = "mpsc_debug", since = "1.8.0")]
 impl<T> fmt::Debug for Receiver<T> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("Receiver").finish()
+        f.debug_struct("Receiver").finish_non_exhaustive()
     }
 }
 
diff --git a/library/std/src/sys/wasi/fs.rs b/library/std/src/sys/wasi/fs.rs
index 1ec3ff6a10f9a..ed0f03e4b710b 100644
--- a/library/std/src/sys/wasi/fs.rs
+++ b/library/std/src/sys/wasi/fs.rs
@@ -130,7 +130,7 @@ impl FileType {
 
 impl fmt::Debug for ReadDir {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("ReadDir").finish()
+        f.debug_struct("ReadDir").finish_non_exhaustive()
     }
 }
 
diff --git a/library/std/src/thread/mod.rs b/library/std/src/thread/mod.rs
index 0ef848ff0c4c1..ffdf4be158457 100644
--- a/library/std/src/thread/mod.rs
+++ b/library/std/src/thread/mod.rs
@@ -1176,7 +1176,10 @@ impl Thread {
 #[stable(feature = "rust1", since = "1.0.0")]
 impl fmt::Debug for Thread {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("Thread").field("id", &self.id()).field("name", &self.name()).finish()
+        f.debug_struct("Thread")
+            .field("id", &self.id())
+            .field("name", &self.name())
+            .finish_non_exhaustive()
     }
 }