re PR fortran/62536 (ICE (segfault) for invalid END BLOCK statement)

re PR fortran/62536 (ICE (segfault) for invalid END BLOCK statement)

gcc/fortran/ChangeLog:

2016-01-28  Andre Vehreschild  <vehre@gcc.gnu.org>

	PR fortran/62536
	* decl.c (gfc_match_end): Only unnest and remove BLOCK namespaces
	when the END encountered does not match a BLOCK's end.

gcc/testsuite/ChangeLog:

2016-01-28  Andre Vehreschild  <vehre@gcc.gnu.org>

	PR fortran/62536
	* gfortran.dg/block_15.f08: New test.
	* gfortran.dg/block_end_error_1.f90: Need to catch additional error
	on incorrectly closed BLOCK.

From-SVN: r232919