fix error in last iteration of ldl

lmfit · Jul 30, 2019 · 7d6aec2 · 7d6aec2
1 parent d4b9cb7
commit 7d6aec2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/uncertainties/core.py b/uncertainties/core.py
@@ -195,7 +195,7 @@ def ldl(A):
 
             a = A[i, i]
             l = A[i+1:, i]
-            if a < -EPS or (a <= 0 and abs(l).max() >= EPS):
+            if a < -EPS or (a <= 0 and len(l) > 0 and abs(l).max() >= EPS):
                 raise numpy.linalg.LinAlgError('matrix must be positive '
                     'semidefinite (failed on %s-th diagonal entry)' % i)