fHamcrest tests fail with gfortran 12 beta

[tclune]

In private communication, a user reported the results:

...
 Start: <Test_IsArrayWithSize_suite.test_array_is_empty>
.
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0  0x7fc5f8c3a31f in ???

I will investigate later when I have access to gfortran 12.