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SHAPE_LINE_CHAIN::Replace Don't call front() or back() if empty 

Fixes https://gitlab.com/kicad/code/kicad/-/issues/8949
This commit is contained in:
Roberto Fernandez Bautista 2021-08-12 16:32:06 +01:00
parent 02e7d9f809
commit d9cf939ba1
2 changed files with 45 additions and 1 deletions
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17
libs/kimath/src/geometry/shape_line_chain.cpp
View File

@ -478,11 +478,25 @@ void SHAPE_LINE_CHAIN::Replace( int aStartIndex, int aEndIndex, const SHAPE_LINE
SHAPE_LINE_CHAIN newLine = aLine;
// Zero points to add?
if( newLine.PointCount() == 0 )
{
Remove( aStartIndex, aEndIndex );
return;
}
// Remove coincident points in the new line
if( newLine.m_points.front() == m_points[aStartIndex] )
{
aStartIndex++;
newLine.Remove( 0 );
// Zero points to add?
if( newLine.PointCount() == 0 )
{
Remove( aStartIndex, aEndIndex );
return;
}
}
if( newLine.m_points.back() == m_points[aEndIndex] && aEndIndex > 0 )
@ -493,7 +507,8 @@ void SHAPE_LINE_CHAIN::Replace( int aStartIndex, int aEndIndex, const SHAPE_LINE
Remove( aStartIndex, aEndIndex );
if( !newLine.PointCount() )
// Zero points to add?
if( newLine.PointCount() == 0 )
return;
// The total new arcs index is added to the new arc indices

29
qa/libs/kimath/geometry/test_shape_line_chain.cpp
View File

@ -290,5 +290,34 @@ BOOST_AUTO_TEST_CASE( NearestPointPt )
}
// Test SHAPE_LINE_CHAIN::Replace( SHAPE_LINE_CHAIN )
BOOST_AUTO_TEST_CASE( ReplaceChain )
{
BOOST_TEST_INFO( "8949 crash" );
std::vector<VECTOR2I> linePts = {
{ 206000000, 140110000 }, { 192325020, 140110000 }, { 192325020, 113348216 },
{ 192251784, 113274980 }, { 175548216, 113274980 }, { 175474980, 113348216 },
{ 175474980, 136694980 }, { 160774511, 121994511 }, { 160774511, 121693501 },
{ 160086499, 121005489 }, { 159785489, 121005489 }, { 159594511, 120814511 },
{ 160086499, 120814511 }, { 160774511, 120126499 }, { 160774511, 119153501 },
{ 160086499, 118465489 }, { 159113501, 118465489 }, { 158425489, 119153501 },
{ 158425489, 119645489 }, { 157325020, 118545020 }, { 157325020, 101925020 },
{ 208674980, 101925020 }, { 208674980, 145474980 }, { 192325020, 145474980 },
{ 192325020, 140110000 }
};
SHAPE_LINE_CHAIN baseChain( linePts, false );
baseChain.SetWidth( 250000 );
BOOST_CHECK_EQUAL( baseChain.PointCount(), linePts.size() );
SHAPE_LINE_CHAIN replaceChain( { VECTOR2I( 192325020, 140110000 ) }, false );
BOOST_CHECK_EQUAL( replaceChain.PointCount(), 1 );
baseChain.Replace( 1, 23, replaceChain );
BOOST_CHECK_EQUAL( baseChain.PointCount(), linePts.size() - ( 23 - 1 ) );
}
BOOST_AUTO_TEST_SUITE_END()