Socket version is 1.94. The thing is to run Perl under AppVerifier or on Checked Build Windows.

ActiveState pointed on confusing syntax and said: "...Behavior on a socket crash then depends on how the perlio library was compiled. ActivePerl binaries are built with MSoft compilers (On Win64, we use the 2003 SDK toolchain). Strawberry binaries are built with different options and with MinGW compilers, so Strawberry does behave a bit differently, even though the code in both versions is the same.
...ActivePerl 5.18 for Win64 will be a departure from our current compiler practice, as it is the first ActivePerl to be switched to MinGW 64 (and that is one of the main reasons why there have been delays in getting 5.18 released)..."