SQLPlus Session Session Appears to be Hung when Debugging with DBMS_DEBUG (Doc ID 789613.1)

Symptoms

SQLPlus Session Session Appears to be Hung when Debugging with DBMS_DEBUG

This code reproduces the problem:

Session 1 - session that is running the function we want to debug.

Session 2 - session that running the debugger.

Step 1 - Session 1:

 

In Oracle 10g Session 1 returns to the prompt with ORA-00900 (as expected)

/*
declare
*
ERROR at line 1:
ORA-00900: invalid SQL statement
ORA-06512: at "SYSTEM.LOOP_TESTER2", line 8
ORA-06512: at line 5
*/

Session 2 returns to prompt as well. 

In Oracle 11g Session 1 still hangs, and nothing happens.

Session 2 returns to the prompt.

Cause

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