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Key: CORE-5007
Type: Bug Bug
Status: Open Open
Priority: Major Major
Assignee: Unassigned
Reporter: Ray Holme
Votes: 0
Watchers: 2
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Firebird Core

UDF returning 0 for a varchar pointer aborts engine

Created: 11/Nov/15 12:43 PM   Updated: 11/Nov/15 12:43 PM
Component/s: UDF
Affects Version/s: 2.5.2 Update 1
Fix Version/s: None

Environment:
A UDF returing a FREE_IT CSTRING(5) CHARACTER SET NONE causes the engine to crash if I return 0 instead of a pointer

QA Status: No test


 Description  « Hide
It used to be valid to return the value 0 for a null pointer. I have no idea if this is due to the FREE-IT phrase or just a null pointer exception.
However it used to work. I fixed the issue by always return a real "ib-malloc'd" string. It would be better if the engine handled this more gracefully.
To be concise - here is the OLD c-code which I have used for a long time.
      if (some-test) return 0;

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