https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78615
Bug ID: 78615
Summary: error: cannot decrement a pointer to incomplete type
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: jason at gcc dot gnu.org
Target Milestone: ---
Starting from r240889, I can't compile following test-case:
$ cat tc.ii
template <typename> class QList
{
public:
~QList ();
void node_destruct ();
};
class A
{
int *provider ();
};
class B
{
public:
B (A *);
QList<int> m_magicMatchers;
};
template <typename T>
void
QList<T>::node_destruct ()
{
struct QListNode *a;
--a;
}
template <typename T> QList<T>::~QList () { node_destruct(); }
int *
A::provider ()
{
new B (this);
}
g++ tc.ii -c -std=c++1z
tc.ii: In instantiation of ‘void QList< <template-parameter-1-1>
>::node_destruct() [with <template-parameter-1-1> = int]’:
tc.ii:24:58: required from ‘QList< <template-parameter-1-1> >::~QList() [with
<template-parameter-1-1> = int]’
tc.ii:11:7: required from here
tc.ii:22:3: error: cannot decrement a pointer to incomplete type ‘QList<
<template-parameter-1-1> >::node_destruct() [with <template-parameter-1-1> =
int]::QListNode’
--a;
^~~
