diff -up qtsvg-everywhere-src-5.15.2/src/svg/qsvghandler.cpp.orig qtsvg-everywhere-src-5.15.2/src/svg/qsvghandler.cpp

--- qtsvg-everywhere-src-5.15.2/src/svg/qsvghandler.cpp.orig	2020-10-27 09:02:11.000000000 +0100

+++ qtsvg-everywhere-src-5.15.2/src/svg/qsvghandler.cpp	2021-03-09 17:48:50.187425243 +0100

@@ -65,6 +65,7 @@

 #include "private/qmath_p.h"

 #include "float.h"

+#include <cmath>

 QT_BEGIN_NAMESPACE

@@ -672,6 +673,9 @@ static qreal toDouble(const QChar *&str)

             val = -val;

     } else {

         val = QByteArray::fromRawData(temp, pos).toDouble();

+        // Do not tolerate values too wild to be represented normally by floats

+        if (std::fpclassify(float(val)) != FP_NORMAL)

+            val = 0;

     }

     return val;

@@ -3043,6 +3047,8 @@ static QSvgStyleProperty *createRadialGr

         ncy = toDouble(cy);

     if (!r.isEmpty())

         nr = toDouble(r);

+    if (nr < 0.5)

+        nr = 0.5;

     qreal nfx = ncx;

     if (!fx.isEmpty())