In bli_l3_sup_thread_decorator_entry,

Line 88 bli_l3_sup_thread_decorator_entry then tries to call bli_thrinfo_barrier( thread ); using the previously freed thrinfo_t thread.
This causes tests to fail when mimalloc is preloaded and pba/sba are disabled, since thread no longer contains valid data.

One solution is to change the signature of bli_gemmsup_int like so

 err_t bli_gemmsup_int
     (
       const obj_t*  alpha,
       const obj_t*  a,
       const obj_t*  b,
       const obj_t*  beta,
       const obj_t*  c,
       const cntx_t* cntx,
       const rntm_t* rntm,
             thrinfo_t** thread
     )

This function should then return a valid thrinfo_t.