Handle failure of realloc() in brk_shot_reuse(), which requires adding a return value to brk_shot_reuse() and handling it in brk_pool_new_node().
If brk_shot_reuse() fails, try allocating a new node. Yes, if realloc() failed, a following malloc() will likely fail, too, but this way the error at least propagates up the call chain.
To keep the logic clean, factor the old if (env->free_list) code into a separate function brk_pool_node_new_from_free_list().
Handle failure of realloc() in brk_shot_reuse(), which requires adding a return value to brk_shot_reuse() and handling it in brk_pool_new_node().
If brk_shot_reuse() fails, try allocating a new node. Yes, if realloc() failed, a following malloc() will likely fail, too, but this way the error at least propagates up the call chain.
To keep the logic clean, factor the old if (env->free_list) code into a separate function brk_pool_node_new_from_free_list().
Fixes #23.