FixedBugs.md

@@ -17,6 +17,9 @@ Bugs in version 4.5.1 that have been fixed in version 4.5.2-pre
 
  - When `ramsey_policy` is used, allow state variables to be set in `histval` block. [(#1193)](../issues/1193)
 
+ - histval erroneously accepts leads, leading to cryptic crashes [(#1510)](../issues/1510)
+.
+
 Bugs in version 4.5.0 that have been fixed in version 4.5.1
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