The following code:
for a in range(26):
  for b in range(26):
   for c in range(26):
    for d in range(26):
     for e in range(26):
      for f in range(26):
       for g in range(26):
        for h in range(26):
         for i in range(26):
          for j in range(26):
           for k in range(26):
            for l in range(26):
             for m in range(26):
              for o in range(26):
               for p in range(26):
                for q in range(26):
                 for r in range(26):
                  for s in range(26):
                   for t in range(26):
                    for u in range(26):
                     for v in range(26):
                       for w in range(26):
                         pass
fails to compile with `SystemError:too many statically nested blocks`, which was described as a serious bug in issue27081.