https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81060
Bug ID: 81060
Summary: [8 Regression] ICE with un-expanded parameter pack
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: error-recovery, ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
Target Milestone: ---
The following invalid testcase triggers an ICE on trunk:
================================================================
template<typename... T> struct A
{
static const int i;
};
template<typename... T> const int A<T>::i = []{ return 0; }();
================================================================
bug.cc:6:41: error: template definition of non-template 'const int A<T>::i'
template<typename... T> const int A<T>::i = []{ return 0; }();
^
bug.cc:6:46: error: parameter packs not expanded with '...':
template<typename... T> const int A<T>::i = []{ return 0; }();
^
bug.cc:6:46: note: 'T'
bug.cc:6:46: error: parameter packs not expanded with '...':
bug.cc:6:46: note: 'T'
Internal compiler error: Error reporting routines re-entered.
0x767408 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
../../gcc/gcc/tree.c:9909
0x5f69d1 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
../../gcc/gcc/tree.h:3206
0x5f69d1 dump_lambda_function
../../gcc/gcc/cp/error.c:1551
0x5f69d1 dump_function_decl
../../gcc/gcc/cp/error.c:1605
0x8aab6c decl_as_string_translate(tree_node*, int)
../../gcc/gcc/cp/error.c:2983
0x9a8b80 cxx_printable_name_internal
../../gcc/gcc/cp/tree.c:2546
0x8a8a62 cp_print_error_function
../../gcc/gcc/cp/error.c:3317
0x8a8a62 cp_diagnostic_starter
../../gcc/gcc/cp/error.c:3271
0x165f93b diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
../../gcc/gcc/diagnostic.c:975
0x165fc7e diagnostic_impl
../../gcc/gcc/diagnostic.c:1099
0x16608a4 internal_error(char const*, ...)
../../gcc/gcc/diagnostic.c:1410
0x767408 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
../../gcc/gcc/tree.c:9909
0x5f69d1 tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
../../gcc/gcc/tree.h:3206
0x5f69d1 dump_lambda_function
../../gcc/gcc/cp/error.c:1551
0x5f69d1 dump_function_decl
../../gcc/gcc/cp/error.c:1605
0x8aab6c decl_as_string_translate(tree_node*, int)
../../gcc/gcc/cp/error.c:2983
0x9a8b80 cxx_printable_name_internal
../../gcc/gcc/cp/tree.c:2546
0x8a8a62 cp_print_error_function
../../gcc/gcc/cp/error.c:3317
0x8a8a62 cp_diagnostic_starter
../../gcc/gcc/cp/error.c:3271
0x165f93b diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
../../gcc/gcc/diagnostic.c:975
Please submit a full bug report, [etc.]
The regression appeared between 2017-05-09 and 2017-05-12.
