[Scons-users] internal error: no cycle found

[TOM TANNER (BLOOMBERG/ LONDON)]

I occasionally get this sort of thing when I've messed something up somewhere:

UserError: Found dependency cycle(s):
  Internal Error: no cycle found for node thing1.o (<SCons.Node.FS.File object at 0x113674400>) in state pending
  Internal Error: no cycle found for node thing2.o (<SCons.Node.FS.File object at 0x113655b00>) in state pending
  Internal Error: no cycle found for node thing3.o (<SCons.Node.FS.File object at 0x118b14390>) in state pending
  Internal Error: no cycle found for node thing4.o (<SCons.Node.FS.File object at 0x11366a320>) in state pending
  thing5 -> thing5

Whats with the internal errors (of which I get far more than the actual dependencies)