python3Packages.bcrypt: Revert to 3.2.2 on i686-linux

The latest bcrypt version segfaults during test_kdf, which prevents the
package from building. The package is in the critical chain for many
NixOS tests, which currently won't complete on i686-linux.

Upstream-Issue: pyca/bcrypt#407

pkgs/development/python-modules/bcrypt/3.nix

@@ -0,0 +1,51 @@
+{ lib
+, buildPythonPackage
+, setuptools
+, isPyPy
+, fetchPypi
+, pythonOlder
+, cffi
+, pytestCheckHook
+, six
+}:
+
+buildPythonPackage rec {
+  pname = "bcrypt";
+  version = "3.2.2";
+  format = "pyproject";
+
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-QzxBDCF3BXcF2iqfLNAd0VdJOyp6wUyFk6FrPatra/s=";
+  };
+
+  nativeBuildInputs = [
+    setuptools
+  ];
+
+  propagatedBuildInputs = [
+    six
+    cffi
+  ];
+
+  propagatedNativeBuildInputs = [
+    cffi
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "bcrypt"
+  ];
+
+  meta = with lib; {
+    description = "Modern password hashing for your software and your servers";
+    homepage = "https://github.com/pyca/bcrypt/";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ domenkozar ];
+  };
+}

pkgs/top-level/python-packages.nix

@@ -1285,7 +1285,10 @@ in {
 
   bcdoc = callPackage ../development/python-modules/bcdoc { };
 
-  bcrypt = callPackage ../development/python-modules/bcrypt { };
+  bcrypt = if stdenv.hostPlatform.system == "i686-linux" then
+    callPackage ../development/python-modules/bcrypt/3.nix { }
+  else
+    callPackage ../development/python-modules/bcrypt { };
 
   beaker = callPackage ../development/python-modules/beaker { };