3 files changed, 5 insertions, 3 deletions
diff --git a/src/libcore/ascii.rs b/src/libcore/ascii.rs
index 2c4bccebceb..e6b0569281f 100644
--- a/src/libcore/ascii.rs
+++ b/src/libcore/ascii.rs
@@ -31,7 +31,7 @@ use iter::FusedIterator;
 /// documentation for more.
 ///
 /// [`escape_default`]: fn.escape_default.html
-#[stable(feature = "core_ascii", since = "1.26.0")]
+#[stable(feature = "rust1", since = "1.0.0")]
 pub struct EscapeDefault {
     range: Range<usize>,
     data: [u8; 4],
@@ -99,7 +99,7 @@ pub struct EscapeDefault {
 /// assert_eq!(b'9', escaped.next().unwrap());
 /// assert_eq!(b'd', escaped.next().unwrap());
 /// ```
-#[stable(feature = "core_ascii", since = "1.26.0")]
+#[stable(feature = "rust1", since = "1.0.0")]
 pub fn escape_default(c: u8) -> EscapeDefault {
     let (data, len) = match c {
         b'\t' => ([b'\\', b't', 0, 0], 2),
diff --git a/src/libcore/iter/range.rs b/src/libcore/iter/range.rs
index 5d57207763e..5896322f111 100644
--- a/src/libcore/iter/range.rs
+++ b/src/libcore/iter/range.rs
@@ -200,7 +200,7 @@ macro_rules! range_trusted_len_impl {
 
 macro_rules! range_incl_trusted_len_impl {
     ($($t:ty)*) => ($(
-        #[stable(feature = "inclusive_range", since = "1.26.0")]
+        #[unstable(feature = "trusted_len", issue = "37572")]
         unsafe impl TrustedLen for ops::RangeInclusive<$t> { }
     )*)
 }
diff --git a/src/libcore/panic.rs b/src/libcore/panic.rs
index 4e72eaa57c7..1720c9d8c60 100644
--- a/src/libcore/panic.rs
+++ b/src/libcore/panic.rs
@@ -120,6 +120,7 @@ impl<'a> PanicInfo<'a> {
     }
 }
 
+#[stable(feature = "panic_hook_display", since = "1.26.0")]
 impl<'a> fmt::Display for PanicInfo<'a> {
     fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
         formatter.write_str("panicked at ")?;
@@ -244,6 +245,7 @@ impl<'a> Location<'a> {
     }
 }
 
+#[stable(feature = "panic_hook_display", since = "1.26.0")]
 impl<'a> fmt::Display for Location<'a> {
     fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
         write!(formatter, "{}:{}:{}", self.file, self.line, self.col)