>From a rather big program I get this error message: include/lac/sparse_matrix.templates.h:356: error: non-lvalue in unary %<&$> I don't have the time to reduce this right now, but the problem seems obvious enough: I guess that this error is generated in cp/tree.c, in lvalue_or_else. This probably needs the exact same change that jsm did in the C frontend (or better: these codes should be merged). The call to lvalue_or_else, btw, comes from typeck.c, and the quotation signs are misspelled there indeed (note $ instead of % in the output). W.
-- Summary: [4.0 regression] Badly formatted error message (quotation problem) 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,jsm at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18001