I don't have time to investigate this further right now, but for the attached testcase, I get this ICE with mainline as of this morning: deal.II/lac> c++ -c sparse_direct.ii source/sparse_direct.cc: In function 'void CommunicationsLog::record_communication(pid_t, CommunicationsLog::Direction, unsigned int, unsigned int, const std::string&) [with T = char]': source/sparse_direct.cc:296: internal compiler error: in cp_expr_size, at cp/cp-objcp-common.c:86 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. W.
-- Summary: [4.0 regression] ICE in cp_expr_size Product: gcc Version: 4.0.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: bangerth at dealii dot org CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18793