Exclude block from endsInNoReturn, fix regression (#22632)

Co-authored-by: SirOlaf <>
(cherry picked from commit d2f36c071b)

compiler/sem.nim

@@ -213,7 +213,7 @@ proc endsInNoReturn(n: PNode): bool =
 
   var it = n
   # skip these beforehand, no special handling needed
-  while it.kind in {nkStmtList, nkStmtListExpr, nkBlockStmt} and it.len > 0:
+  while it.kind in {nkStmtList, nkStmtListExpr} and it.len > 0:
     it = it.lastSon
 
   case it.kind

tests/exprs/t22604.nim

@@ -10,19 +10,6 @@ for i in 0..<1:
       else:
         raiseAssert "Won't get here"
 
-# block
-for i in 0..<1:
-  let x =
-    case false
-    of true:
-      42
-    of false:
-      block:
-        if true:
-          continue
-        else:
-          raiseAssert "Won't get here"
-
 # nested case
 for i in 0..<1:
   let x =