https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71630
Bug ID: 71630 Summary: ICE on valid C++14 code with variable templates: in get, at cgraph.h:395 Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: su at cs dot ucdavis.edu Target Milestone: --- The following C++11 code causes an ICE when compiled with the current GCC trunk on x86_64-linux-gnu in both 32-bit and 64-bit modes. This is a regression from 6.1.x. $ g++-trunk -v Using built-in specs. COLLECT_GCC=g++-trunk COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto --prefix=/usr/local/gcc-trunk --disable-bootstrap Thread model: posix gcc version 7.0.0 20160622 (experimental) [trunk revision 237715] (GCC) $ $ g++-6.1 -c -std=c++14 small.cpp $ clang++ -c -std=c++14 small.cpp $ $ g++-trunk -c -std=c++14 small.cpp small.cpp:3:23: internal compiler error: in get, at cgraph.h:395 template int a < int >; ^ 0x10c32ab symtab_node::get(tree_node const*) ../../gcc-source-trunk/gcc/cgraph.h:392 0x10c32ab varpool_node::get(tree_node const*) ../../gcc-source-trunk/gcc/cgraph.h:2480 0x10c32ab varpool_node::get_create(tree_node*) ../../gcc-source-trunk/gcc/varpool.c:144 0x764d23 var_finalized_p ../../gcc-source-trunk/gcc/cp/decl2.c:1971 0x764d23 c_parse_final_cleanups() ../../gcc-source-trunk/gcc/cp/decl2.c:4807 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <http://gcc.gnu.org/bugs.html> for instructions. $ ------------------------------------- template < typename > extern int a; template < typename > int a = 1; template int a < int >;