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-rw-r--r--Carpet/CarpetInterp2/src/fasterp.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/Carpet/CarpetInterp2/src/fasterp.cc b/Carpet/CarpetInterp2/src/fasterp.cc
index c59330556..6f42fe2b3 100644
--- a/Carpet/CarpetInterp2/src/fasterp.cc
+++ b/Carpet/CarpetInterp2/src/fasterp.cc
@@ -1060,6 +1060,9 @@ namespace CarpetInterp2 {
if (verbose) CCTK_VInfo (CCTK_THORNSTRING,
"Interpolating %d variables", int(nvars));
assert (values.size() == nvars);
+
+ if (nvars == 0) return;
+
for (size_t v=0; v<values.size(); ++v) {
int const vi = varinds.AT(v);
assert (vi >= 0 and vi <= CCTK_NumVars());