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-rw-r--r--CHANGES.rst2
-rw-r--r--pyasn1/type/univ.py2
2 files changed, 3 insertions, 1 deletions
diff --git a/CHANGES.rst b/CHANGES.rst
index ffbcf83..33614ad 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,8 @@ Revision 0.4.4, released XX-07-2018
- Fixed native encoder type map to include all ASN.1 types
rather than just ambiguous ones
+- Fixed crash in `.prettyPrint` of `Sequence` and `Set` occuring
+ at OPTIONAL components
Revision 0.4.3, released 23-05-2018
-----------------------------------
diff --git a/pyasn1/type/univ.py b/pyasn1/type/univ.py
index a19f6ba..898cf25 100644
--- a/pyasn1/type/univ.py
+++ b/pyasn1/type/univ.py
@@ -2457,7 +2457,7 @@ class SequenceAndSetBase(base.AbstractConstructedAsn1Item):
scope += 1
representation = self.__class__.__name__ + ':\n'
for idx, componentValue in enumerate(self._componentValues):
- if componentValue is not noValue:
+ if componentValue is not noValue and componentValue.isValue:
representation += ' ' * scope
if self.componentType:
representation += self.componentType.getNameByPosition(idx)