Syntax error in interpolated symbol

[jbreeden]

I'm trying to get Ruby's specs against MRuby + mruby-apr, but I've run into a funny parser error. It seems you can interpolate one value - but not two - in a symbol definition:

# This one's OK
> :"__mspec_#{'test'}_"
 => :__mspec_test_

# This one shouldn't be raising
> :"__mspec_#{'test'}_#{'test2'}__"
line 3: syntax error, unexpected tSTRING_PART, expecting tSTRING

Just to note, the obvious workaround works just fine:

> "__mspec_#{'test'}_#{'test2'}__".to_sym
 => :__mspec_test_test2__