commit https://github.com/vim/vim/commit/28fb79db6b52d1154e8dc63d227673648c2fce15 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jan 9 22:28:33 2016 +0100 patch 7.4.1073 Problem: Alloc_id depends on numbers, may use the same one twice. It's not clear from the number what it's for. Solution: Use an enum. Add a function to lookup the enum value from the name.

--- a/src/globals.h
+++ b/src/globals.h
@@ -1621,7 +1621,7 @@ EXTERN char *ignoredp;
 
 #ifdef FEAT_EVAL
 /* set by alloc_fail(): ID */
-EXTERN int  alloc_fail_id INIT(= 0);
+EXTERN alloc_id_T  alloc_fail_id INIT(= aid_none);
 /* set by alloc_fail(), when zero alloc() returns NULL */
 EXTERN int  alloc_fail_countdown INIT(= -1);
 /* set by alloc_fail(), number of times alloc() returns NULL */