https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112828
Bug ID: 112828 Summary: Abort with malloc(): corrupted top size Product: gcc Version: 13.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: townsend at astro dot wisc.edu Target Milestone: --- Created attachment 56768 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56768&action=edit MWE demonstrating problem When I compile the attached MWE with gfortran -o test test.f90 ...I get the following runtime error: malloc(): corrupted top size Program received signal SIGABRT: Process abort signal. Backtrace for this error: #0 0x7f13a2e7760f in ??? #1 0x7f13a2ec500c in ??? #2 0x7f13a2e77571 in raise #3 0x7f13a2e614b1 in abort #4 0x7f13a2e623b4 in ??? #5 0x7f13a2ece874 in ??? #6 0x7f13a2ed1fdf in ??? #7 0x7f13a2ed2b59 in __libc_malloc #8 0x40191a in MAIN__ #9 0x401c8c in main Aborted If I comment out the first allocate statement (the one with the STAT argument), then the program runs without problem (even though this statement isn't actually executed). There are a number of other things that make the bug go away; e.g., shrinking the length of the character variables in the main program to 20 or smaller. Setting the length to 21 still runs without error, but the second element of c_r ends up with some junk in it, viz: foo foo A cheers, Rich