https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99640
Bug ID: 99640
Summary: Internal compiler error: in lookup_template_class_1,
at cp/pt.c:9895
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fiesh at zefix dot tv
Target Milestone: ---
The following reduced code results in the internal compiler error mentioned in
the subject line:
---------------
class QVariantOutputArchive {
public:
QVariantOutputArchive(int);
template <typename...> void operator()() {
{
{
{
{
{
{
{
{
{
{
{
{
{
{
[](auto) { operator(); };
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
};
template <typename, int> void qVariantArchiveTestVersioned() {
int variant;
QVariantOutputArchive oar(variant);
oar();
}
void qVariantArchiveTest() { qVariantArchiveTestVersioned<int, true>; }
---------------
% c++ -c -std=c++17 zomg.ii
zomg.ii: In instantiation of ‘void QVariantOutputArchive::operator()() [with
<template-parameter-1-1> = {}]’:
zomg.ii:39:6: required from ‘void qVariantArchiveTestVersioned() [with
<template-parameter-1-1> = int; int <anonymous> = 1]’
zomg.ii:41:69: required from here
zomg.ii:19:44: internal compiler error: in lookup_template_class_1, at
cp/pt.c:9895
19 | [](auto) { operator(); };
| ^~~~~~~~~~
0x5c3a44 lookup_template_class_1
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:9895
0x7399a5 lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:10118
0x7399a5 tsubst_aggr_type
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:13400
0x734326 tsubst(tree_node*, tree_node*, int, tree_node*)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:15181
0x73114c tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:19302
0x730bcc tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:19160
0x730bcc tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:19281
0x731904 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:20211
0x72a405 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:19160
0x72a405 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:18773
0x72bdb1 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:17840
0x72bdb1 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:17885
0x72aeb8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:17840
0x72aeb8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:18174
0x72aeb8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:17840
0x72aeb8 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:18174
0x72ff96
tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:17840
0x72ff96
tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:19113
0x7327c9 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:20508
0x72a405 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/usr/src/debug/sys-devel/gcc-10.2.0-r5/gcc-10.2.0/gcc/cp/pt.c:19160
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