Fix bug in UnreachableBlocks

java/ql/lib/semmle/code/java/controlflow/UnreachableBlocks.qll

@@ -223,7 +223,7 @@ class UnreachableBasicBlock extends BasicBlock {
       // Not accessible from the successful case
       not constSwitchStmt.getMatchingCase().getBasicBlock().getABBSuccessor*() = failingCaseBlock and
       // Blocks dominated by the failing case block are unreachable
-      constSwitchStmt.getAFailingCase().getBasicBlock().bbDominates(this)
+      failingCaseBlock.bbDominates(this)
     )
   }
 }

java/ql/test/library-tests/unreachableblocks/UnreachableBlocks.expected

@@ -3,7 +3,6 @@
 | unreachableblocks/Unreachable.java:12:22:14:3 | { ... } |
 | unreachableblocks/Unreachable.java:17:3:17:9 | case ... |
 | unreachableblocks/Unreachable.java:19:3:19:9 | case ... |
-| unreachableblocks/Unreachable.java:22:3:22:9 | case ... |
 | unreachableblocks/Unreachable.java:24:3:24:9 | case ... |
 | unreachableblocks/Unreachable.java:26:3:26:10 | case ... |
 | unreachableblocks/Unreachable.java:27:3:27:10 | default |