Fix #174111: implode now works when voice 1 has only rests

Author: CubikingChill

src/engraving/editing/cmd.cpp

@@ -4179,8 +4179,16 @@ bool Score::cmdImplode()
                 continue;
             }
             EngravingItem* dst = s->element(dstTrack);
-            if (dst && dst->isChord()) {
-                Chord* dstChord = toChord(dst);
+            // Fix #174111: find first chord across all voices, not just voice 1
+            Chord* dstChord = nullptr;
+            for (voice_idx_t i = 0; i < VOICES; ++i) {
+                EngravingItem* e = s->element(dstTrack + i);
+                if (e && e->isChord()) {
+                    dstChord = toChord(e);
+                    break;
+                }
+            }
+            if (dstChord) {
                 // see if we are tying in to this chord
                 Chord* tied = 0;
                 for (Note* n : dstChord->notes()) {
@@ -4227,14 +4235,12 @@ bool Score::cmdImplode()
                             }
                         }
                     }
-                    // delete chordrest from source track if possible
-                    if (src && src->voice()) {
+                    // delete rest from source track if possible
+                    if (src && src != dstChord && src->voice()) {
                         undoRemoveElement(src);
                     }
                 }
             }
-            // TODO - use first voice that actually has a note and implode remaining voices on it?
-            // see https://musescore.org/en/node/174111
             else if (dst) {
                 // destination track has something, but it isn't a chord
                 // remove rests from other voices if in "voice mode"