[Bug libstdc++/85439] mt19937_64 producing unexpected result only in certain configuration

[foddex at foddex dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85439

--- Comment #4 from Marc "Foddex" Oude Kotte <foddex at foddex dot net> ---
The reason I was expecting the same result everywhere is because of this
statement on cppreference.com:


"Notes
The 10000th consecutive invocation of a default-contructed std::mt19937 is
required to produce the value 4123659995.

The 10000th consecutive invocation of a default-contructed std::mt19937_64 is
required to produce the value 9981545732273789042"


Source: http://en.cppreference.com/w/cpp/numeric/random/mersenne_twister_engine

Obviously I'm not testing the 10000th consecutive invocation but the 1st, but I
still expected things to be similar (and they are, in 7/8 test cases).