https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79308
Bug ID: 79308
Summary: Internal compilation error on specialization of nested
template classes
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: bjh...@sags-per-mail.de
Target Milestone: ---
Created attachment 40639
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40639&action=edit
Source code
The following code (attached as element.cpp) causes the error
internal compiler error: in finish_member_declaration, at
cp/semantics.c:2966
when compiled by calling
gcc -v -save-temps -Wall -Wextra -std=c++11 element.cpp
with GCC 6.3.0. The nearly same error is caused by GCC 5.4.1 and GCC 4.8.
---------------------------------------
template <class>
struct Element
{
Element(void)
{
WriteOutput<int>();
}
template <typename>
struct WriteOutput
{
};
};
template <>
template <typename InnerType>
struct Element<int>::WriteOutput<InnerType>
{ // line mentioned in error message
void foo(void)
{
}
virtual void bar(void)
{
}
};
Element<int> e;
---------------------------------------
The error disappears on each of the following changes:
* Remove one of the element functions in the specialization.
* Remove the "virtual" of all element functions.
* Make the specialized type-argument of the outer template different from the
unspecialized template type-argument of the nested template. As long as they
are the same, no matter which actually, the error is triggered.
In these case the compiler complains correctly about the missing main function.
If I find out how to attach another file I will attach the whole compiler
output.
