Backreference in shorthand interpolation is interpreted as a global

[Earlopain]

I believe this is 100% inconsequential but I'll report this anyways:

"this is a #$+"
(dstr
  (str "this is a ")
  (gvar :$+))

But:

"this is a #{$+}"
(dstr
  (str "this is a ")
  (begin
    (back-ref :$+)))

It's not considered here:

parser/lib/parser/lexer-strings.rl

Lines 807 to 811 in 70ac244

	interp_var = '#' (
	global_var % { interp_var_kind = :gvar }
	| class_var_v % { interp_var_kind = :cvar }
	| instance_var_v % { interp_var_kind = :ivar }
	);