Debugging macro to check an expression is false.
If the assertion fails (i.e. the expression is not false), an error message is logged and the application is either terminated or the testcase marked as failed.
Note that unlike g_assert(), this macro is unaffected by whether
G_DISABLE_ASSERT is defined. Hence it should only be used in tests and,
g_assert() should not be used in tests.
Available since: 2.38
This function is not directly available to language bindings.