supdupd: The result of a left shift is undefined when the left operand is negative.

[johnsonjh]

• supdupd.c, line 1238, col 17: warning: The result of the left shift is undefined because the left operand is negative [core.UndefinedBinaryOperatorResult]

  count = -((-1 << 6) | temp[2]);
           ~~ ^
  1 warning generated.

  

[larsbrinkhoff]

Maybe change to ~0U?

[johnsonjh]

Tested that and it seems OK...

[johnsonjh]

Resolved in current master.