Implement MolDSException::NextException. #31730

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/trunk@1412 1136aad2-a195-0410-b898-f5ea1d11b9d8
Reimplement MolDSException::Deserialization to load multiple exceptions. #31730

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/trunk@1413 1136aad2-a195-0410-b898-f5ea1d11b9d8
Indent backtraces.  #31491

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/trunk@1414 1136aad2-a195-0410-b898-f5ea1d11b9d8
Avoid exceptions while deserialization of exceptions. #31730

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/trunk@1415 1136aad2-a195-0410-b898-f5ea1d11b9d8
Test for ser/des of MolDSException
Test ser/des of multiple exceptions