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More hardening

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This commit is contained in:
Alexey Milovidov 2020-06-28 19:11:53 +03:00
parent 4ec66545a3
commit 78ee63e395
1 changed files with 1 additions and 1 deletions
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2
src/Columns/ColumnArray.cpp
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@ -43,7 +43,7 @@ ColumnArray::ColumnArray(MutableColumnPtr && nested_column, MutableColumnPtr &&
throw Exception("offsets_column must be a ColumnUInt64", ErrorCodes::LOGICAL_ERROR);
size_t size = offsets_concrete->size();
if (size != 0)
if (size != 0 && nested_column)
{
/// This will also prevent possible overflow in offset.
if (nested_column->size() != offsets_concrete->getData()[size - 1])