[ruby-cvs:78761] 1e88f6eb95 (master): Refactor free page insertion

Aaron Patterson	2019-12-18 10:26:11 +0900 (Wed, 18 Dec 2019)

  New Revision: 1e88f6eb95

  https://github.com/ruby/ruby/commit/1e88f6eb95

  Log:
    Refactor free page insertion
    
    I am trying to fix this error:
    
      http://ci.rvm.jp/results/trunk-gc_compact@silicon-docker/2491596
    
    Somehow we have a page in the `free_pages` list that is full.  This
    commit refactors the code so that any time we add a page to the
    `free_pages` list, we do it via `heap_add_freepage`.  That function then
    asserts that the free slots on that page are not 0.

  Modified files:
    gc.c