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-rw-r--r--src/symmetry.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/src/symmetry.c b/src/symmetry.c
index e304de48..4bc8d115 100644
--- a/src/symmetry.c
+++ b/src/symmetry.c
@@ -315,7 +315,8 @@ static ReflItemList *coset_decomp(signed int hs, signed int ks, signed int ls,
ReflItemList *get_twins(ReflItemList *items, const char *holo, const char *mero)
{
int i;
- ReflItemList *ops = new_items();;
+ ReflItemList *ops = new_items();
+ int expected, actual;
/* Run the coset decomposition for every reflection in the "pattern",
* and see which gives the highest number of possibilities. This
@@ -339,5 +340,15 @@ ReflItemList *get_twins(ReflItemList *items, const char *holo, const char *mero)
}
+ /* Idiot check */
+ actual = num_items(ops);
+ expected = num_general_equivs(holo) / num_general_equivs(mero);
+ if ( actual != expected ) {
+ ERROR("I couldn't find the number of twin laws that I expected."
+ " This is an internal error, and shouldn't happen. "
+ "Sorry.\n");
+ abort();
+ }
+
return ops;
}