Dear Paul, > I have added a testcase, which has been committed as revision 229452.
If I compile the test with -fsanitize=address,undefined I get at run time ==72440==ERROR: AddressSanitizer: global-buffer-overflow on address 0x00010adfee20 at pc 0x00010adf913d bp 0x7fff54e0a270 sp 0x7fff54e0a268 READ of size 8 at 0x00010adfee20 thread T0 #0 0x10adf913c in __test_mod_MOD_method (a.out+0x10000413c) #1 0x10adf9aac in MAIN__ (a.out+0x100004aac) #2 0x10adf9b30 in main (a.out+0x100004b30) #3 0x7fff8e6de5c8 in start (libdyld.dylib+0x35c8) #4 0x0 (<unknown module>) 0x00010adfee20 is located 0 bytes to the right of global variable 'x' defined in '/opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocate_with_source_15.f03:75' (0x10adfed80) of size 160 SUMMARY: AddressSanitizer: global-buffer-overflow (a.out+0x10000413c) in __test_mod_MOD_method Shadow bytes around the buggy address: … Dominique