[erlang-questions] Erlang init_per_group terminates gen_server beforehand

[Galina Lezina]

Common test init_per_group/2 terminates gen_server beforehand (right in the
end of init_per_group/2 call) when it is started with gen_server:start_link.
But it is ok to start server with gen_server:start.

gen_server can be started with any of these methods (start and start_link)
in init_per_suite/1 and init_per_testcase/2 and it will work fine.

Why it is not possible to start gen_server in init_per_group/2 with
gen_server:start_link?
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