[PWGDQ] bugfix in matching QA task

aferrero2707 · aferrero2707 · commit 24603cd82c20 · 2026-01-19T18:30:06.000+01:00
Fixed crash when the collision table is empty
diff --git a/PWGDQ/Tasks/qaMatching.cxx b/PWGDQ/Tasks/qaMatching.cxx
@@ -1773,6 +1773,9 @@ struct qaMatching {
       collisionIds.push_back(collision.globalIndex());
     }
 
+    if (collisionIds.empty())
+      return;
+
     for (size_t cid = 1; cid < collisionIds.size() - 1; cid++) {
       const auto& collision = collisions.rawIteratorAt(collisionIds[cid]);
       int64_t collisionIndex = collision.globalIndex();

Original file line number	Diff line number	Diff line change
`@@ -1773,6 +1773,9 @@ struct qaMatching {`
`1773`	`1773`	`collisionIds.push_back(collision.globalIndex());`
`1774`	`1774`	`}`
`1775`	`1775`
	`1776`	`+ if (collisionIds.empty())`
	`1777`	`+ return;`
	`1778`	`+`
`1776`	`1779`	`for (size_t cid = 1; cid < collisionIds.size() - 1; cid++) {`
`1777`	`1780`	`const auto& collision = collisions.rawIteratorAt(collisionIds[cid]);`
`1778`	`1781`	`int64_t collisionIndex = collision.globalIndex();`