Press M-. on BAR, it works. Open the scratch buffer, type XXX::BAR and press M-. on it to get (with *DEBUG-SWANK-BACKEND* T):
i have this patch in my repo unmerged for 4+ years now. i'm not sure anymore, but i think it's a fix for that:
Fix: source-path-parser honours the readtables specified in swank:*readtable-alist* https://github.com/attila-lendvai/slime/commit/743018eb04dafd647c31bd66682b4...