Read / write blob types of problems

When setting up a blob field types and does not allow for the space-time, not downward Graph mandate implementation, the state appears to be the same cycle of death.

table structure:
create table t1 (c1 blob not null);

graph :
DB_INPUT_TABLE → DB_OUTPUT_TABLE

fmt file:

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When the document will fmt nullable attribute is set to true, the normal procedure can be implemented, this should be a bug

fmt file:

Thanks for report. Bug was fixed.