The text of Stage 1 begins by introducing local variables flags, basefield, uppercase, floatfield, showpos, and showbase, note that showbase is initialized with flags & (ios_base::showbase)

Tables 86 and 87 use basefield, uppercase, and floatfield as one would expect. However, Table 89 uses showbase in the expression flags & showbase, re-applying the bitwise &, and then uses undefined variable showpoint in the expression flags & showpoint.

Either the definition of showpoint should be added to the list of local variables in Stage 1 and Table 89 modified to say showpos and showbase without the repeated bitwise &, or showbase should be removed from the list of local variables and Table 89 modified to say flags & ios_base::showpos and flags & ios_base::showpoint. The former option seems more consistent, the latter more concise.