Comment # 3 on bug 1119186 from Wolfgang Bauer

(In reply to Krzysztof Kurek from comment #2)
> S  | Name              | Type    | Version                    | Arch   |
> Repository             
> ---+-------------------+---------+----------------------------+--------+-----
> -------------------
> i+ | kdevelop5         | package | 5.3.0-2.1                  | x86_64 |
> openSUSE-Tumbleweed-Oss
> i  | kdevelop5-lang    | package | 5.3.0-2.1                  | noarch |
> openSUSE-Tumbleweed-Oss
> i  | kdevplatform      | package | 5.3.0-2.1                  | x86_64 |
> openSUSE-Tumbleweed-Oss
> i  | kdevplatform-lang | package | 5.3.0-2.1                  | noarch |
> openSUSE-Tumbleweed-Oss
> i+ | libblockdev       | package | 2.18-1.1                   | x86_64 |
> openSUSE-Tumbleweed-Oss
> i+ | libblockdev2      | package | 2.18-1.1                   | x86_64 |
> openSUSE-Tumbleweed-Oss
> i  | libkdevplatform53 | package | 5.3.0-2.1                  | x86_64 |
> openSUSE-Tumbleweed-Oss
> i+ | liblockdev1       | package | 1.0.3_git201003141408-31.1 | x86_64 |
> openSUSE-Tumbleweed-Oss
> i+ | lockdev           | package | 1.0.3_git201003141408-31.1 | x86_64 |
> openSUSE-Tumbleweed-Oss

Looks fine. I suspected some version inconsistency from different repos.

I'm wondering why you reported this against KDE:Extra then, but well... ;-)

Hm, not sure at the moment why it's not working for you.
I'm using Leap 15.0 here with the latest version from KDE:Extra (devel project
for Tumbleweed, so should be the same), and the things you describe do work
fine here.

Too late now for more though, I'll look at it again tomorrow.

Just one thing: you don't have the c++ parser disabled by chance?
Maybe you could try on a fresh user account to rule out a problem with the
settings. (I think the Appimage wouldn't use the config files in the user's
home)