Exception under XP with misplaced acciaccatura

[Trevor Daniels]

Under 2.11.34, 2.11.41 and 2.11.42 LilyPond gives the
warning:

 warning: programming error: must have Item for spanner
bound
        \times 2/3 { \acciaccatura d8        c8 b c }

and then bombs with a 0xc0000005 exception when compiling
this code:

\new Staff {
  \relative c'' {
    \times 2/3 { \acciaccatura d8       c8 b c }
  }
}

This is under Windows XP SP2 (the error report says Windows
NT 5.1 Build: 2600)

Removing the acciaccatura or the \times 2/3 from the example
gives code that generates no errors.

Removing the \new Staff { .. } still produces the warning
message, but no exception.

Placing the \acciccatura outside the \times 2/3 fixes the
problem, of course, but any exception, even with bad code,
is a notifiable bug.

Trevor D