programming error: minimise_least_squares (): Nothing to minimise

[Neil Puttock]

Hi there,

The following snippet spits out this error, but the output is
unobjectionable:

\version "2.11.30"
\paper{ ragged-right=##t }
\score {
    \new Staff \relative c'' {
        << { \time 12/16 c16[ b a r  b g] } \\ { r8. r } >> %error
disappears if manual beaming  or second rest in lower voice is removed
    }
}

Regards,
Neil