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-rw-r--r--src/mongo/base/string_data-inl.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mongo/base/string_data-inl.h b/src/mongo/base/string_data-inl.h
index a99a78d230e..00b403a569c 100644
--- a/src/mongo/base/string_data-inl.h
+++ b/src/mongo/base/string_data-inl.h
@@ -91,7 +91,8 @@ namespace mongo {
if ( pos > size() )
throw std::out_of_range( "out of range" );
- if ( pos + n > size() )
+ // truncate to end of string
+ if ( n > size() - pos )
n = size() - pos;
return StringData( _data + pos, n );