InScope ASSERT failure with break006

+panic! (the 'impossible' happened)
+  GHC version 9.3.20220221:
+	ASSERT failed!
+  in_scope InScope {wild_00}
+  tenv [ams :-> LiftedRep, amt :-> LiftedRep, amu :-> a_I16g[rt],
+        amv :-> ()]
+  tenvFVs {a_I16g[rt]}
+  cenv []
+  cenvFVs {}
+  tys [q_ams]
+  cos []
+  Call stack:
+      CallStack (from HasCallStack):
+        assertPpr, called at compiler/GHC/Core/TyCo/Subst.hs:<line>:<column> in <package-id>:GHC.Core.TyCo.Subst
+        checkValidSubst, called at compiler/GHC/Core/TyCo/Subst.hs:<line>:<column> in <package-id>:GHC.Core.TyCo.Subst
+        substTy, called at compiler/GHC/Core/Opt/Simplify/Env.hs:<line>:<column> in <package-id>:GHC.Core.Opt.Simplify.Env

Related to #21113 (closed)

Edited Feb 22, 2022 by sheaf

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