Crash with some edit operations on non-styled texts

• Feb 12, 2013 - 22:55
Type
Functional
Severity
S2 - Critical
Status
closed
Project
MuseScore

Setup : commit cce7968 (2013-02-12) under Linux Mint 14, Qt lib 4.8.3

Steps:
1) Enter edit mode on a non-styled text; I used tempo texts which, by default, are not styled.
2) Press [Home]

Result: crash.

Analysis: Crash is at function QString& SimpleText::firstLine() in file libmscore/simpletext.cpp, which is called by function Text::layout1() (file libmscore/text.cpp, line 258).

If the text is non-styled, the SimpleText::_layout list is empty and the [0] operator crashes. Either SimpleText::firstLine() should check for SimpleText::_layout size or Text::layout1() should not call SimpleText::firstLine() for non-styled texts.

Thanks,

M.

Comments

• Feb 12, 2013 - 23:04

Update

Not all non-styled texts have an empty SimpleText::_layout; but at least texts with manual character formats do. In my case, the (tempo) text was "Prelude. Modérément." with a portion manually set to italics and a slightly smaller font size.

In these cases, SimpleText::_layout is empty and the call quoted above crashes.

Thanks,

M.

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