OK, so it's not the build flags, it's having qscintilla already installed on the build system what makes the difference. Looks like setting QMAKE_L...

Ah - you're right, I just made an assumption, since I think the dependency has often been the cause in the past. Unfortunately, I'm not sure when t...

No, this isn't a case of a package needing being rebuilt because of a dependency upgrade: the missing symbol is provided by the qscintilla library ...

In the normal way using makepkg with the current (unmodified) qscintilla PKGBUILD. Just to be sure, I upgraded my system and confirmed the bug stil...

How did you rebuild the package exactly?

Yes - the plugin loads without any errors and is usable.

Are you sure rebuilding the package fixes this?