http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51318
Bug #: 51318 Summary: [4.7 Regression] segfault on Eigen3 Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: marc.gli...@normalesup.org enum { ColMajor = 0, RowMajor = 0x1, AutoAlign = 0, DontAlign = 0x2 }; template<typename _Scalar, int _Rows, int _Cols, int _Options = (_Rows==1) ? RowMajor : ColMajor > class Matrix; template<typename T> class MatrixBase { typedef Matrix<double,T::X,0> type; }; $ g++ -fsyntax-only a.ii a.ii:4:30: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions.