https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66292
Bug ID: 66292
Summary: ICE in constexpr call evaluation
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: colu...@gmx-topmail.de
Target Milestone: ---
When compiling Testing.cxx from
https://github.com/Arcoth/Constainer/blob/9a96ba3089778fe655fde2334701077e2d6c8f35/Testing.cxx#L91,
GCC bails out at the end:
/home/arcoth/Programming/Constainer/Testing.cxx:91:41: in constexpr expansion
of »Constainer::strToInt<int>(((const char*)" 6849."), 0u, 10)«
/home/arcoth/Programming/Constainer/Parser.hxx:156:22: in constexpr expansion
of »Constainer::strToInt<int>(str,
Constainer::CharTraits<Char>::length<char>(str), pos, base)«
/home/arcoth/Programming/Constainer/Parser.hxx:143:25: in constexpr expansion
of »Constainer::strToInt<int, const char*>(str, (str + ((sizetype)len)), ret,
base)«
/home/arcoth/Programming/Constainer/Testing.cxx:91:55: in constexpr expansion
of »Constainer::BasicString<char, 256ul>(((const
char*)"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"))«
/home/arcoth/Programming/Constainer/String.hxx:179:9: in constexpr expansion
of »Constainer::BasicString<Char, MaxN, Traits>::append<char, 256ul,
Constainer::CharTraits<char> >(str)«
/home/arcoth/Programming/Constainer/String.hxx:292:16: in constexpr expansion
of »Constainer::BasicString<Char, MaxN, Traits>::append<char, 256ul,
Constainer::CharTraits<char> >(str,
Constainer::CharTraits<Char>::length<char>(str))«
/home/arcoth/Programming/Constainer/String.hxx:277:47: in constexpr expansion
of »Constainer::BasicString<Char, MaxN, Traits>::insert<char, 256ul,
Constainer::CharTraits<char> >(((Constainer::BasicString<char,
256ul>*)this)->Constainer::BasicString<char,
256ul>::<anonymous>.Constainer::detail::BasicVector<T, MaxN, CopyTraits,
addBufferSize>::size<char, 256ul, Constainer::CharTraits<char>, 1ul>(), str,
len)«
/home/arcoth/Programming/Constainer/String.hxx:235:3: in constexpr expansion
of »((Constainer::BasicString<char,
256ul>*)this)->Constainer::BasicString<char,
256ul>::<anonymous>.Constainer::detail::BasicVector<T, MaxN, CopyTraits,
addBufferSize>::_createInsertionSpace<char, 256ul,
Constainer::CharTraits<char>, 1ul>((((Constainer::Array<char,
257ul>::const_iterator)((Constainer::BasicString<char,
256ul>*)this)->Constainer::BasicString<char,
256ul>::<anonymous>.Constainer::detail::BasicVector<char, 256ul,
Constainer::CharTraits<char>, 1ul>::<anonymous>.Constainer::Array<T,
Size>::begin<char, 257ul>()) + ((sizetype)index)), len)«
/home/arcoth/Programming/Constainer/Vector.hxx:83:9: in constexpr expansion
of »Constainer::Assert((((const value_type*)Constainer::detail::BasicVector<T,
MaxN, CopyTraits, addBufferSize>::end<char, 256ul,
Constainer::CharTraits<char>, 1ul>()) >= pos), 0u)«
/home/arcoth/Programming/Constainer/Testing.cxx:91:55: interner
Compiler-Fehler: Speicherzugriffsfehler
static_assert( Constainer::strToInt<int>(" 6849.") == 6849 );
^
0xc8bd7f crash_signal
../.././gcc/toplev.c:380
0x9f8444 bool vec_safe_reserve<tree_node*, va_gc>(vec<tree_node*, va_gc,
vl_embed>*&, unsigned int, bool)
../.././gcc/vec.h:575
0x9f8444 tree_node** vec_safe_push<tree_node*, va_gc>(vec<tree_node*, va_gc,
vl_embed>*&, tree_node* const&)
../.././gcc/vec.h:669
0x9f8444 add_local_decl(function*, tree_node*)
../.././gcc/function.c:6705
0xcfce86 remap_decls
../.././gcc/tree-inline.c:653
0xcfea30 remap_block
../.././gcc/tree-inline.c:721
0xcff7e8 copy_bind_expr
../.././gcc/tree-inline.c:794
0xcff7e8 copy_tree_body_r(tree_node**, int*, void*)
../.././gcc/tree-inline.c:1128
0xf0e5a2 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hashset_traits>*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hashset_traits>*))
../.././gcc/tree.c:11117
0xcf68ef copy_tree_body
../.././gcc/tree-inline.c:2964
0xcfd31e copy_fn(tree_node*, tree_node*&, tree_node*&)
../.././gcc/tree-inline.c:5994
0x7cedc6 cxx_eval_call_expression
../.././gcc/cp/constexpr.c:1347
0x7cfff4 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:3062
0x7d0c47 cxx_eval_conditional_expression
../.././gcc/cp/constexpr.c:1648
0x7d0c47 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:3353
0x7d0c47 cxx_eval_conditional_expression
../.././gcc/cp/constexpr.c:1648
0x7d0c47 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:3353
0x7d5855 cxx_eval_statement_list
../.././gcc/cp/constexpr.c:2853
0x7d0c07 cxx_eval_constant_expression
../.././gcc/cp/constexpr.c:3425
0x7cf0c3 cxx_eval_call_expression
../.././gcc/cp/constexpr.c:1377
I can currently not be asked to boil the example down, since it emerges from a
fairly large project. However, I can confirm this in trunk v. 20150502.
