Fix crash on measure-layout tag in first measure of piece

miiizen · RomanPudashkin · commit 1e7d798b2e91 · 2024-12-06T15:29:15.000+02:00
diff --git a/src/importexport/musicxml/internal/musicxml/importmxmlpass2.cpp b/src/importexport/musicxml/internal/musicxml/importmxmlpass2.cpp
@@ -2895,7 +2895,7 @@ void MusicXMLParserPass2::measureLayout(Measure* measure)
     while (m_e.readNextStartElement()) {
         if (m_e.name() == "measure-distance") {
             const Spatium val(m_e.readDouble() / 10.0);
-            if (!measure->prev()->isHBox()) {
+            if (!measure->prev() || !measure->prev()->isHBox()) {
                 MeasureBase* gap = m_score->insertBox(ElementType::HBOX, measure);
                 toHBox(gap)->setBoxWidth(val);
             }

Original file line number	Diff line number	Diff line change
`@@ -2895,7 +2895,7 @@ void MusicXMLParserPass2::measureLayout(Measure* measure)`
`2895`	`2895`	`while (m_e.readNextStartElement()) {`
`2896`	`2896`	`if (m_e.name() == "measure-distance") {`
`2897`	`2897`	`const Spatium val(m_e.readDouble() / 10.0);`
`2898`		`- if (!measure->prev()->isHBox()) {`
	`2898`	`+ if (!measure->prev() \|\| !measure->prev()->isHBox()) {`
`2899`	`2899`	`MeasureBase* gap = m_score->insertBox(ElementType::HBOX, measure);`
`2900`	`2900`	`toHBox(gap)->setBoxWidth(val);`
`2901`	`2901`	`}`