PR# 19074 Exception when compiling

Problem Report Summary
Submitter: manus_eiffel
Category: EiffelStudio
Priority: Medium
Date: 2015/05/28
Class: Bug
Severity: Serious
Number: 19074
Release: 15.05
Confidential: No
Status: Open
Environment: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.81 Safari/537.36
Synopsis: Exception when compiling

Open 2 EiffelStudio window and make sure both have the output tool visible. Click compile and the output will appear in both windows.

Then close on Window and click compile. It will violate a precondition and later crash because it is still trying to do the output in the output panel from the window we just closed.
To Reproduce

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