Issue 1751 in lilypond: Most analysis brackets get incorrect event-cause info, breaking point-and-click & \tweak

[lilypond]

Status: Started
Owner: address@hidden
Labels: Type-Defect Priority-Medium

New issue 1751 by address@hidden: Most analysis brackets get incorrect  
event-cause info, breaking point-and-click & \tweak
http://code.google.com/p/lilypond/issues/detail?id=1751

Since the Horizontal_bracket_engraver fails to reset event storage at each  
timestep, when HorizontalBracket grobs are created they often get an  
event-cause associated with an existing bracket.

In the following snippet, the second nested bracket gets the same  
event-cause as the first, which means the line thickness tweak is applied  
to both grobs:

\version "2.15.5"

\layout {
  \context {
    \Voice
    \consists "Horizontal_bracket_engraver"
  }
}

\relative c' {
  c1-\tweak #'thickness #6 \startGroup
  c1\startGroup
  c1\stopGroup
  c1\stopGroup
}

Attachments:
        bracket-bug.png  2.4 KB