1 files changed, 2 insertions, 0 deletions
diff --git a/src/corelib/text/qlocale_tools.cpp b/src/corelib/text/qlocale_tools.cpp
index 874f42c8e5..e6ecadbe4e 100644
--- a/src/corelib/text/qlocale_tools.cpp
+++ b/src/corelib/text/qlocale_tools.cpp
@@ -496,6 +496,7 @@ QString &decimalForm(const QString &zero, const QString &decimal, const QString
             digits.append(zero);
         break;
     case PMChopTrailingZeros:
+        Q_ASSERT(digits.length() / digitWidth <= qMax(decpt, 1) || !digits.endsWith(zero));
         break;
     }
 
@@ -536,6 +537,7 @@ QString &exponentForm(const QString &zero, const QString &decimal, const QString
             digits.append(zero);
         break;
     case PMChopTrailingZeros:
+        Q_ASSERT(digits.length() / digitWidth <= 1 || !digits.endsWith(zero));
         break;
     }