Compilation error if the user does not own the code files

al2o3cr · March 12, 2024, 2:07pm

The underlying BEAM code (on Unix-ish systems, anyways) always calls utime with a not-NULL pointer:

erts/emulator/nifs/unix/unix_prim_file.c

master


      
              return 0;
          }
          
          posix_errno_t efile_set_time(const efile_path_t *path, Sint64 a_time, Sint64 m_time, Sint64 c_time) {
              struct utimbuf tval;
          
              tval.actime = (time_t)a_time;
              tval.modtime = (time_t)m_time;
          
              (void)c_time;
          
              if(utime((const char*)path->data, &tval) < 0) {
                  return errno;
              }

but that’s been in the code for years and years, so it can’t be the reason for the recent change in behavior you observed.

The name of the function that’s calling touch (each_cycle) suggests that something may have changed in the dependency graph of your application. Comparing the output of mix xref between an older “known good” version and now could provide some insight.