Removed extraneous yout copy

CHANGELOG.md

@@ -48,6 +48,8 @@ failing the step.
 The functions `CVodeGetUserDataB` and `IDAGetUserDataB` were added to CVODES and
 IDAS, respectively.
 
+Removed extraneous copy of output vector when using ARKODE in `ARK_ONE_STEP` mode.
+
 ### Bug Fixes
 
 Fixed a bug in the CVODE(S) inequality constraint handling where the predicted

src/arkode/arkode.c

@@ -1159,8 +1159,7 @@ int ARKodeEvolve(void* arkode_mem, sunrealtype tout, N_Vector yout,
     {
       istate            = ARK_SUCCESS;
       ark_mem->tretlast = *tret = ark_mem->tcur;
-      N_VScale(ONE, ark_mem->yn, yout);
-      ark_mem->next_h = ark_mem->hprime;
+      ark_mem->next_h           = ark_mem->hprime;
       break;
     }