https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52830
David Binderman <dcb314 at hotmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dcb314 at hotmail dot com --- Comment #3 from David Binderman <dcb314 at hotmail dot com> --- I see a similar ice on trunk 20140820 /home/dcb/rpmbuild/BUILD/aqsis-1.8.2/libs/riutil/ricxx_cache.h:192:50: internal compiler error: canonical types differ for identical types RtConstMatrix and RtBasis {aka RtConstMatrix} operator RtConstMatrix&() const { return m_data; } ^ 0x7ae7e3 comptypes(tree_node*, tree_node*, int) ../../src/trunk/gcc/cp/typeck.c:1407 0x7abb4b structural_comptypes ../../src/trunk/gcc/cp/typeck.c:1341 0x7b1b16 comptypes(tree_node*, tree_node*, int) ../../src/trunk/gcc/cp/typeck.c:1399