diff -r 2a258985ffeb -r b529e640015d tests/test-annotate.t
--- a/tests/test-annotate.t	Sat Mar 03 15:31:37 2018 -0800
+++ b/tests/test-annotate.t	Sun Mar 04 10:42:51 2018 -0500
@@ -897,6 +897,38 @@
 
   $ cd ..
 
+Annotate with orphaned CR (issue5798)
+-------------------------------------
+
+  $ hg init repo-cr
+  $ cd repo-cr
+
+  $ substcr() {
+  > sed 's/\r/[CR]/g'
+  > }
+
+  >>> with open('a', 'wb') as f:
+  ...     f.write(b'0a\r0b\r\n0c\r0d\r\n0e\n0f\n0g')
+  $ hg ci -qAm0
+  >>> with open('a', 'wb') as f:
+  ...     f.write(b'0a\r0b\r\n1c\r1d\r\n0e\n1f\n0g')
+  $ hg ci -m1
+
+  $ hg annotate -r0 a | substcr
+  0: 0a[CR]0b[CR]
+  0: 0c[CR]0d[CR]
+  0: 0e
+  0: 0f
+  0: 0g
+  $ hg annotate -r1 a | substcr
+  0: 0a[CR]0b[CR]
+  1: 1c[CR]1d[CR]
+  0: 0e
+  1: 1f
+  0: 0g
+
+  $ cd ..
+
 Annotate with linkrev pointing to another branch
 ------------------------------------------------