The tag is present in Lintian version 2.104.244. That is the most recent version we know about.
The binary is installed as a detached "debug symbols" ELF file, but it does not appear to have debug information associated with it.
A common cause is not passing
-g to GCC when compiling.
Implementation detail: Lintian checks for the ".debug_line" and the ".debug_str" sections. If either of these are present, the binary is assumed to contain debug information.
Refer to Bug#668437 for details.