After copy/paste operation with dotted half note chords and ties, 4/4 bar ends up with only 3 beats in it

• Jul 29, 2014 - 04:57
Type
Functional
Severity
S2 - Critical
Status
closed
Project
MuseScore

This happens on Mac OS X 10.9 with a 2.0 nightly build downloaded yesterday.

Steps to reproduce:

- Create a new score with one staff (I used organ and removed the two bass clefs in the wizard).
- In the first beat of the first bar, add a chord with 3 notes, each one a dotted half note. (I used F B E).
- Shift-drag to select the chord, copy it, then select the quarter rest in beat 4 and paste it.
- Select the top note of the quarter-note chord in beat 4 and click the eighth note button to change it to an eighth note and break the tie.
- Shift-drag to select the half-note chord in beat 1 of bar 2, then delete it.
- You'll notice that bar 2 now only has three beats in it, as shown in the attached screenshot.

Attachment Size
3_beats_in_44_bar.png 17.78 KB

Comments

• Jul 29, 2014 - 13:18

The example in the original bug report can be solved by adding:
c2->setDuration(d.fraction());
at line 413 of libmscore/paste.cpp

However, there is a similar bug also resent in 1.3 which is not solved by this:
1- Create a new score with one staff (e.g. flute);
2- In the first beat of the first bar, add a chord with 3 notes, each one a dotted half note;
3- Select the 1/4 rest of first bar and click the eighth note button to change it to two 1/8 rests;
3- Shift-drag to select the chord, copy it, then select the second 1/8 rest in beat 4 and paste it.
4- The score is corrupt at this point, see attached image. The second measure contains 3/4 + 1/8 + 1/4 = 9/8 = 4/4 + 1/8

Windows 8.1, commit ae475eb

Notes:
The problem arises because a single note of duration 5/8 (=3/4 - 1/8) does not exist. The note should be splitted in 1/2 + 1/8.
This bug is also present in MuseScore 1.3.
Should this be submitted as a separate bug report?

Attachment Size
corrupted.png 14.79 KB

Reply