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== What I have learnt today ==
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Fixing the bug of C++

So probably this is an illustration of what it means by “fixing the bug in C++”?

This does not compile in C++11 yet perfectly fine in C++14:

constexpr int get_value ()
{
	int val = 5;
	int val2 = 3;
	return val * val2;
}

Based on C++ Weekly - Ep 178 - The Important Parts of C++14 In 9 Minutes(7m22s)