https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69903
Bug ID: 69903
Summary: Function template specialization with CRTP-class
causes compiler segfault
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tolstokor at gmail dot com
Target Milestone: ---
Created attachment 37756
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37756&action=edit
Preprocessed source file
The bug exists in versions from 4.8.1 to latest 5.3.0, including ARM and ARM64
compiler versions, with any compiler flags and optimization level. Platform
independent: most Linux distributives and MinGW (Windows) version crashes while
compiling this code:
// CRTP
template <typename T>
struct A {
// Default behavior
template <int i>
inline static void f() {
volatile int x = i;
};
inline static void F() {
T::template f<0>();
T::template f<1>();
T::template f<2>();
}
};
struct B : A<B> { /* empty */ };
// Specification for i == 2
template<>
void B::f<2>() {
volatile int y = 777;
};
int main() {
B::F();
}
Error messages like this:
/tmp/gcc-explorer-compiler116122-74-ozif0b/example.cpp: In instantiation of
'static void A<T>::f() [with int i = 2; T = B]':
13 : required from 'static void A<T>::F() [with T = B]'
26 : required from here
7 : internal compiler error: Segmentation fault
volatile int x = i;
^
****
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.8/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccmxbU4L.out file, please attach this to
your bugreport.
Compilation failed
