Overly Simplified Savepoint Bug Repro

overly_simplified_savepoint_bug.sql

CREATE OR REPLACE PROCEDURE public.top_function() LANGUAGE PLPGSQL AS $procedure$
    begin
    call second_function_that_fails();
      EXCEPTION
        when others then
        RAISE NOTICE 'Top function exception handling';
         call third_function_that_fails();
    end; $procedure$;

CREATE OR REPLACE PROCEDURE public.second_function_that_fails() LANGUAGE PLPGSQL AS $procedure$
    begin
        PERFORM user_id/0 FROM users_table as foo_second;
    end; $procedure$;

CREATE OR REPLACE PROCEDURE public.third_function_that_fails() LANGUAGE PLPGSQL AS $procedure$
    begin
        PERFORM user_id/0 FROM users_table as foo_third;
           EXCEPTION
        when others then
        RAISE NOTICE 'Third function failed';
    end; $procedure$;

CALL top_function();