Contrary to other distributions Arch and Manjaro do not provide debug packages with symbols.

Get PKGBUILD

Note: the asp package is not available for Manjaro you have to clone manually.

Build package tarball

If signature verification fails because of unknown public key. Try the following :

Note: Even validating manually may return gpg: BAD signature from no clue why. At least validate the hash against the upstream repo …

Install and remove after use

Note: pacman -Qem can help to identify packages installed manually from tarballs.