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+(* File reduced by coq-bug-finder from 1656 lines to 221 lines to 26 lines to 7 lines. *)
+
+Module Long.
+  Require Import Coq.Classes.RelationClasses.
+
+  Hint Extern 0 => apply reflexivity : typeclass_instances.
+  Hint Extern 1 => symmetry.
+
+  Lemma foo : exists m' : Type, True.
+    intuition. (* Anomaly: Uncaught exception Not_found. Please report. *)
+  Abort.
+End Long.
+
+Module Short.
+  Require Import Coq.Classes.RelationClasses.
+
+  Hint Extern 0 => apply reflexivity : typeclass_instances.
+
+  Lemma foo : exists m' : Type, True.
+    try symmetry. (* Anomaly: Uncaught exception Not_found. Please report. *)
+  Abort.
+End Short.