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-rw-r--r--src/xmlpatterns/expr/qunaryexpression.cpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/xmlpatterns/expr/qunaryexpression.cpp b/src/xmlpatterns/expr/qunaryexpression.cpp
index 1c4524e..f99096b 100644
--- a/src/xmlpatterns/expr/qunaryexpression.cpp
+++ b/src/xmlpatterns/expr/qunaryexpression.cpp
@@ -59,7 +59,10 @@ Item UnaryExpression::evaluateSingleton(const DynamicContext::Ptr &context) cons
{
const Item item(m_operand2->evaluateSingleton(context));
- if(item)
+ if (item)
+ // If the item is an untypedAtomic (or atomicString), the cast to Numeric will
+ // return a garbage object and will most likely cause a crash.
+ // There is simply no way to static cast from an instance of AtomicString to a Number.
return item.as<Numeric>()->toNegated();
else
return Item();