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 >;
