Debian Package rebuild

"Unqualified lookup into dependent bases of class templates" build failure(s) — clang 9.0.1

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This problem is that g++ accepts code which should be refused. g++ is doing an unqualified lookup into dependent bases of class templates. See the official website.
The attached code clearly shows the issue and the fix:

#include <vector>

template class A: public std::vector {
public:
	void del() {
        // The right syntax is:
        // this->erase(std::vector::begin());
        erase(std::vector::begin());
	}

};

void foo() {
    A B;
    B.del();	
}

3 errors

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