python3Packages.pandas: skip test_rolling_var_numerical_issues

On amd64, it does not fail on nixpkgs by default, but does fail if you
build everything with e.g. -march=haswell -mtune=haswell

pkgs/development/python-modules/pandas/default.nix

@@ -90,6 +90,10 @@ buildPythonPackage rec {
     "test_comparison_invalid"
     # AssertionError: Regex pattern '"quotechar" must be string, not int'
     "python-kwargs2"
+    # Tests for rounding errors and fails if we have better precision
+    # than expected, e.g. on amd64 with FMA or on arm64
+    # https://github.com/pandas-dev/pandas/issues/38921
+    "test_rolling_var_numerical_issues"
   ] ++ lib.optionals stdenv.isDarwin [
     "test_locale"
     "test_clipboard"