CppunitTest_svgio test failure, additional <mask> in dumped XML

[Stephan Bergmann]

On my Linux machine, CppunitTest_svgio keeps failing with

> xmltesttools.cxx:95:Assertion
> Test name: testTdf97542_1::TestBody
> equality assertion failed
> - Expected: 1
> - Actual  : 0
> - In <>, XPath '/primitive2D/transform/objectinfo/textsimpleportion' number of nodes is incorrect
> 
> xmltesttools.cxx:95:Assertion
> Test name: testTdf97542_2::TestBody
> equality assertion failed
> - Expected: 1
> - Actual  : 0
> - In <>, XPath '/primitive2D/transform/objectinfo/svgradialgradient' number of nodes is incorrect

The problem appears to be that in the XML that

>     xmlDocUniquePtr pDocument = dumper.dumpAndParse(Primitive2DContainer(aSequenceTdf97542_1));

dumps out (and then parses in again) there is an unexpected <mask> 
element nested in between the expected <transform> and <objectinfo> 
elements.  That is, the dumped XML (for the first testTdf97542_1, but 
similarly also for the second testTdf97542_2) is

> <?xml version="1.0" encoding="UTF-8"?>
> <primitive2D>
>  <transform xy11="26" xy12="0" xy13="0" xy21="0" xy22="26" xy23="0" xy31="0" xy32="0" xy33="1">
>   <mask>
>    <polypolygon height="50" width="200" minx="0" miny="0" maxx="200" maxy="50" path="m0 0h200v50h-200z">
>     <polygon>
>      <point x="0" y="0"/>
>      <point x="200" y="0"/>
>      <point x="200" y="50"/>
>      <point x="0" y="50"/>
>     </polygon>
>    </polypolygon>
>    <objectinfo>
>     <svgradialgradient startx="0" starty="0" radius="0.5" spreadmethod="pad" opacity="1">
>      <transform xy11="1" xy12="0" xy13="0" xy21="0" xy22="1" xy23="0" xy31="0" xy32="0" xy33="1"/>
>      <polypolygon height="50" width="200" minx="0" miny="0" maxx="200" maxy="50" path="m0 0h200v50h-200z">
>       <polygon>
>        <point x="0" y="0"/>
>        <point x="200" y="0"/>
>        <point x="200" y="50"/>
>        <point x="0" y="50"/>
>       </polygon>
>      </polypolygon>
>     </svgradialgradient>
>     <textsimpleportion width="48" height="48" x="50" y="40" text="Text" fontcolor="#ffff00" familyname="serif"/>
>    </objectinfo>
>   </mask>
>  </transform>
> </primitive2D>

whereas e.g. on my Windows machine it is

> <?xml version="1.0" encoding="UTF-8"?>
> <primitive2D>
>  <transform xy11="26" xy12="0" xy13="0" xy21="0" xy22="26" xy23="0" xy31="0" xy32="0" xy33="1">
>   <objectinfo>
>    <svgradialgradient startx="0" starty="0" radius="0.5" spreadmethod="pad" opacity="1">
>     <transform xy11="1" xy12="0" xy13="0" xy21="0" xy22="1" xy23="0" xy31="0" xy32="0" xy33="1"/>
>     <polypolygon height="50" width="200" minx="0" miny="0" maxx="200" maxy="50" path="m0 0h200v50h-200z">
>      <polygon>
>       <point x="0" y="0"/>
>       <point x="200" y="0"/>
>       <point x="200" y="50"/>
>       <point x="0" y="50"/>
>      </polygon>
>     </polypolygon>
>    </svgradialgradient>
>    <textsimpleportion width="48" height="48" x="50" y="40" text="Text" fontcolor="#ffff00" familyname="serif"/>
>   </objectinfo>
>   <hiddengeometry>
>    <polygonhairline color="#000000">
>     <polygon>0,0 200,0 200,50 0,50</polygon>
>    </polygonhairline>
>   </hiddengeometry>
>  </transform>
> </primitive2D>

(And what would fix the failing tests for me on Linux is

> diff --git a/svgio/qa/cppunit/SvgImportTest.cxx b/svgio/qa/cppunit/SvgImportTest.cxx
> index fcd76f12bd1f..35b295bfba0a 100644
> --- a/svgio/qa/cppunit/SvgImportTest.cxx
> +++ b/svgio/qa/cppunit/SvgImportTest.cxx
> @@ -929,10 +929,10 @@ CPPUNIT_TEST_FIXTURE(Test, testTdf97542_1)
>  
>      CPPUNIT_ASSERT (pDocument);
>  
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/textsimpleportion", "fontcolor", "#ffff00");
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/textsimpleportion", "text", "Text");
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/textsimpleportion", "height", "48");
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/textsimpleportion", "familyname", "serif");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/textsimpleportion", "fontcolor", "#ffff00");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/textsimpleportion", "text", "Text");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/textsimpleportion", "height", "48");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/textsimpleportion", "familyname", "serif");
>  }
>  
>  CPPUNIT_TEST_FIXTURE(Test, testTdf97542_2)
> @@ -945,13 +945,13 @@ CPPUNIT_TEST_FIXTURE(Test, testTdf97542_2)
>  
>      CPPUNIT_ASSERT (pDocument);
>  
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/svgradialgradient", "startx", "1");
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/svgradialgradient", "starty", "1");
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/svgradialgradient/focalx", 0);
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/svgradialgradient/focaly", 0);
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/svgradialgradient", "radius", "3");
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/svgradialgradient", "spreadmethod", "pad");
> -    assertXPath(pDocument, "/primitive2D/transform/objectinfo/svgradialgradient", "opacity", "1");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/svgradialgradient", "startx", "1");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/svgradialgradient", "starty", "1");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/svgradialgradient/focalx", 0);
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/svgradialgradient/focaly", 0);
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/svgradialgradient", "radius", "3");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/svgradialgradient", "spreadmethod", "pad");
> +    assertXPath(pDocument, "/primitive2D/transform/mask/objectinfo/svgradialgradient", "opacity", "1");
>  }
>  
>  CPPUNIT_TEST_FIXTURE(Test, testTdf97543)

but which would of course break things for all the other builds that now 
succeed.)

Does anybody have an idea what could cause this difference in the dumped 
XML?