IDE truncates the project file when it is closed.

• Lazarus 2.3.0 (rev main-2_3-1255-gf1af59ba) FPC 3.3.1 x86_64-win64-win32/win64
• Operating System: Windows 8.1
• CPU / Bitness: 64-bit

What happens

.lpr file is truncated after it is viewed and then closed.

What did you expect

No changes to the project source.

Steps to reproduce

• Create a new Project using Project > Application.

• View the project source using Project > View Project Source

• Press Ctrl+F4 to close the .lpr file.

• Press F9 to compile the application.

An error occurs: Fatal: Syntax error, "BEGIN" expected but "end of file" found.

• Use Project > View Project Source again. The .lpr file is completely empty.