Catch internal inconsistency with too few grid points per process

Check that there are enough grid points to send while synchronizing.


git-svn-id: http://svn.cactuscode.org/arrangements/CactusPUGH/PUGH/trunk@519 b61c5cb5-eaca-4651-9a7a-d64986f99364

1 files changed, 5 insertions, 0 deletions

diff --git a/src/PostSendGA.c b/src/PostSendGA.c
index 22f11b5..b462c52 100644
--- a/src/PostSendGA.c
+++ b/src/PostSendGA.c
@@ -107,6 +107,11 @@ void PostSendGA(pGH *pughGH, int dir, pComm *comm)
     iend     = GA->extras->overlap[1][dir];
     iterator = GA->extras->iterator;
 
+    if (iend[0] > GA->extras->nsize[0])
+    {
+      CCTK_WARN (CCTK_WARN_ABORT, "Internal error in communication descriptor: Trying to send data that don't exist. (This may happen if a process has too few grid points.)");
+    }
+
     /* set iterator to the start vector */
     for(dim = 0; dim < GA->extras->dim; dim++)
     {