1 files changed, 8 insertions, 0 deletions
diff --git a/src/qml/compiler/qv4jsir.cpp b/src/qml/compiler/qv4jsir.cpp
index 9a1a8bab42..aa3769be46 100644
--- a/src/qml/compiler/qv4jsir.cpp
+++ b/src/qml/compiler/qv4jsir.cpp
@@ -749,6 +749,11 @@ void BasicBlock::setStatements(const QVector<Stmt *> &newStatements)
 {
     Q_ASSERT(!isRemoved());
     Q_ASSERT(newStatements.size() >= _statements.size());
+    // FIXME: this gets quite inefficient for large basic-blocks, so this function/case should be re-worked.
+    foreach (Stmt *s, _statements) {
+        if (!newStatements.contains(s))
+            s->destroyData();
+    }
     _statements = newStatements;
 }
 
@@ -788,18 +793,21 @@ void BasicBlock::insertStatementBeforeTerminator(Stmt *stmt)
 void BasicBlock::replaceStatement(int index, Stmt *newStmt)
 {
     Q_ASSERT(!isRemoved());
+    _statements[index]->destroyData();
     _statements[index] = newStmt;
 }
 
 void BasicBlock::removeStatement(Stmt *stmt)
 {
     Q_ASSERT(!isRemoved());
+    stmt->destroyData();
     _statements.remove(_statements.indexOf(stmt));
 }
 
 void BasicBlock::removeStatement(int idx)
 {
     Q_ASSERT(!isRemoved());
+    _statements[idx]->destroyData();
     _statements.remove(idx);
 }