Always import for SandboxViolation so it's pickleable. Ref #440.

1d74aaab · Jason R. Coombs · 3915be77 · 1d74aaab
Commit 1d74aaab authored Dec 13, 2015 by Jason R. Coombs
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setuptools/sandbox.py setuptools/sandbox.py +1 -0

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--- a/setuptools/sandbox.py
+++ b/setuptools/sandbox.py
@@ -384,6 +384,7 @@ class DirectorySandbox(AbstractSandbox):
        AbstractSandbox.__init__(self)

    def _violation(self, operation, *args, **kw):
+        from setuptools.sandbox import SandboxViolation
        raise SandboxViolation(operation, args, kw)

    if _file: