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1.) Start debug on java source. 2.) Debugger is stopped on the breakpoint. 3) Open debug window 4) Select Thread tab 5) Explore main thread of your class 6) For example click on watch 7) Close IDE. Message about bad serialization Thread window is showed. 8) After new running IDE again debuger window has more tabs. [pz] Debugger window has more tabs again.
Priority is changed to P4 (normal).
Resolved for 3.4.x or earlier, no new info since then -> closing.