Looking at this further, it appears that the !echo messages only appear at /v4, which...
!echo command does not work in 3.0
In 7-Zip v9.2, double-clicking on an exe in a .7z does not mark the temp-extracted...
FWIW, coincidentally I mentioned this limitation here: https://textplain.wordpre...
7Zip installer vulnerable to DLL hijacking
SECURITY: 2.14.0 Installer vulnerable to DLL Hijacking
I tried both codeblocks-16.01-setup.exe and codeblocks-16.01mingw-setup.exe and both...
SECURITY: Windows installer subject to DLL Hijacking