X-Git-Url: http://gitweb.michael.orlitzky.com/?p=dunshire.git;a=blobdiff_plain;f=dunshire%2Fmatrices.py;h=bcf83778d62752436f7894b5a6fbad4cc3e1012e;hp=13e8150f5c807914782dbcb49733f36be513912c;hb=040374ca134b2f3d962b91a9dac97a7600032685;hpb=7bbec60c0c6be1b7ac28140a51c53fbad19247bf

diff --git a/dunshire/matrices.py b/dunshire/matrices.py
index 13e8150..bcf8377 100644
--- a/dunshire/matrices.py
+++ b/dunshire/matrices.py
@@ -140,7 +140,10 @@ def eigenvalues(symmat):
 
     domain_dim = symmat.size[0]
     eigs = matrix(0, (domain_dim, 1), tc='d')
-    syevr(symmat, eigs)
+
+    # Create a copy of ``symmat`` here because ``syevr`` clobbers it.
+    dummy = matrix(symmat, symmat.size)
+    syevr(dummy, eigs)
     return list(eigs)