c++/8860: illegal constructor causes internal compiler error

a-hw@mail.ru a-hw@mail.ru
Sat Dec 7 08:16:00 GMT 2002


>Number:         8860
>Category:       c++
>Synopsis:       illegal constructor causes internal compiler error
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Dec 07 08:16:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     a-hw@mail.ru
>Release:        gcc (GCC) 3.2 (mingw special 20020817-1)
>Organization:
>Environment:
Win2K, MingGW 2.0.0 prebuilt binaries
>Description:
This code causes g++ to feel segmentation fault. I've replaced initializer for base class Smoother(size) with Smoother_Lookup(size):

template<typename Function>
class Smoother_Lookup : public Smoother {
public:
	Smoother_Lookup(int size) : Smoother_Lookup(size), lookup(size) {
		std::generate_n(lookup.begin(), size, Function(size));
	}
	int smooth(int r) { return lookup[r]; }
protected:
	std::vector<int> lookup;
};
>How-To-Repeat:
Try to compile test.cpp:

make test.o
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="test.cpp"
Content-Disposition: inline; filename="test.cpp"

#include <vector>

class Smoother {
public:
	Smoother(int size) : _size(size) { }
	virtual ~Smoother() = 0;
	virtual int smooth(int r) = 0;
protected:
	int _size;
};

template<typename Function>
class Smoother_Lookup : public Smoother {
public:
	Smoother_Lookup(int size) : Smoother_Lookup(size), lookup(size) {
		std::generate_n(lookup.begin(), size, Function(size));
	}
	int smooth(int r) { return lookup[r]; }
protected:
	std::vector<int> lookup;
};

struct Test {
	int operator()() { return 0; }
};

int
f() {
	Smoother_Lookup<Test> sl(1);
}



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