diff --git a/compiler/rustc_parse/messages.ftl b/compiler/rustc_parse/messages.ftl
index 449d0b964fd4..3f3300117460 100644
--- a/compiler/rustc_parse/messages.ftl
+++ b/compiler/rustc_parse/messages.ftl
@@ -98,6 +98,8 @@ parse_bare_cr = {$double_quotes ->
     }
     .escape = escape the character
 
+parse_bare_cr_in_frontmatter = bare CR not allowed in frontmatter
+
 parse_bare_cr_in_raw_string = bare CR not allowed in raw string
 
 parse_binder_and_polarity = `for<...>` binder not allowed with `{$polarity}` trait polarity modifier
@@ -352,7 +354,6 @@ parse_frontmatter_length_mismatch = frontmatter close does not match the opening
 parse_frontmatter_too_many_dashes = too many `-` symbols: frontmatter openings may be delimited by up to 255 `-` symbols, but found {$len_opening}
 parse_frontmatter_unclosed = unclosed frontmatter
     .note = frontmatter opening here was not closed
-
 parse_function_body_equals_expr = function body cannot be `= expression;`
     .suggestion = surround the expression with `{"{"}` and `{"}"}` instead of `=` and `;`
 
diff --git a/compiler/rustc_parse/src/errors.rs b/compiler/rustc_parse/src/errors.rs
index 42327c7e343d..4e789a321649 100644
--- a/compiler/rustc_parse/src/errors.rs
+++ b/compiler/rustc_parse/src/errors.rs
@@ -829,6 +829,13 @@ pub(crate) struct FrontmatterTooManyDashes {
     pub len_opening: usize,
 }
 
+#[derive(Diagnostic)]
+#[diag(parse_bare_cr_in_frontmatter)]
+pub(crate) struct BareCrFrontmatter {
+    #[primary_span]
+    pub span: Span,
+}
+
 #[derive(Diagnostic)]
 #[diag(parse_leading_plus_not_supported)]
 pub(crate) struct LeadingPlusNotSupported {
diff --git a/compiler/rustc_parse/src/lexer/mod.rs b/compiler/rustc_parse/src/lexer/mod.rs
index 4d0139e179f4..f9bf50de091a 100644
--- a/compiler/rustc_parse/src/lexer/mod.rs
+++ b/compiler/rustc_parse/src/lexer/mod.rs
@@ -614,8 +614,8 @@ fn validate_frontmatter(
             });
         }
 
+        let line_end = real_s.find('\n').unwrap_or(real_s.len());
         if invalid_infostring {
-            let line_end = real_s.find('\n').unwrap_or(real_s.len());
             let span = self.mk_sp(
                 frontmatter_opening_end_pos,
                 frontmatter_opening_pos + BytePos(line_end as u32),
@@ -624,6 +624,14 @@ fn validate_frontmatter(
         }
 
         let last_line_start = real_s.rfind('\n').map_or(0, |i| i + 1);
+
+        let content = &real_s[line_end..last_line_start];
+        if let Some(cr_offset) = content.find('\r') {
+            let cr_pos = start + BytePos((real_start + line_end + cr_offset) as u32);
+            let span = self.mk_sp(cr_pos, cr_pos + BytePos(1 as u32));
+            self.dcx().emit_err(errors::BareCrFrontmatter { span });
+        }
+
         let last_line = &real_s[last_line_start..];
         let last_line_trimmed = last_line.trim_start_matches(is_horizontal_whitespace);
         let last_line_start_pos = frontmatter_opening_pos + BytePos(last_line_start as u32);
diff --git a/tests/ui/frontmatter/content-cr.rs b/tests/ui/frontmatter/content-cr.rs
index 768282fc2b93..71bede928f37 100644
--- a/tests/ui/frontmatter/content-cr.rs
+++ b/tests/ui/frontmatter/content-cr.rs
@@ -1,10 +1,9 @@
 ---
-package.name = "
"
+package.name = "
" # //~ ERROR bare CR not allowed in frontmatter
 package.description = "é"
 ---
 
 // ignore-tidy-cr
-//@ check-pass
 
 #![feature(frontmatter)]
 
diff --git a/tests/ui/frontmatter/content-cr.stderr b/tests/ui/frontmatter/content-cr.stderr
new file mode 100644
index 000000000000..d59b899cc4c3
--- /dev/null
+++ b/tests/ui/frontmatter/content-cr.stderr
@@ -0,0 +1,8 @@
+error: bare CR not allowed in frontmatter
+  --> $DIR/content-cr.rs:2:17
+   |
+LL | package.name = "␍" #
+   |                 ^
+
+error: aborting due to 1 previous error
+