GIMP 2.10 - installer copies 32-bit twain.exe on Win64, resulting in error dialog on startup

GIMP version: 2.10.4

Operating System: Windows 7 64-bit

Package: Windows installer from gimp.org

Description of the bug

The installer copies 32-bit "twain,1.exe" as twain.exe into the plugins folder, instead of the 64-bit twain,2.exe

This results in error dialog on startup, "twain.exe - Entry Point Not Found [...] The procedure entry point inflateValidate could not be located in the dynamic link library zlib1.dll."

This is because the 32-bit twain.exe cannot open the 64-bit zlib1.dll.

This has happened for me since first release of 2.10. Have tried fully uninstalling and reinstalling, same result.

SOLUTION

I unpacked the installer using https://sourceforge.net/projects/innounp/ and checked "twain,1.exe" and "twain,2.exe" to see which is 32-bit and which is 64-bit; copied the 64-bit twain,2.exe into plugins, renamed to twain.exe (deleting default version) and error is gone.

Reproduction

Is the bug reproducible? Always

Reproduction steps:

1. Run GIMP 2.10+ on Windows 7 64-bit
2. Error dialog appears
3. That's it

…

Expected result: Launch without error dialog

Actual result: Launches with error dialog

Additional information

EDIT: Have confirmed that all other plugins are correctly installed as 64-bit; only twain.exe installs as 32-bit.