vim-patch:7.4.1866

Problem:    Invalid memory access when exiting with EXITFREE defined.
            (Dominique Pelle)
Solution:   Set "really_exiting" and skip error messages.

a96732150c

This fails to build, due to a00c2e0ecb
removing really_exiting from globals.h, but the next commit fixes the
build failure.

src/nvim/eval.c

@@ -21569,7 +21569,10 @@ void func_unref(char_u *name)
   if (name != NULL && isdigit(*name)) {
     fp = find_func(name);
     if (fp == NULL) {
+      // Ignore when invoked through free_all_mem().
+      if (!really_exiting) {
         EMSG2(_(e_intern2), "func_unref()");
+      }
     } else {
       user_func_unref(fp);
     }

src/nvim/memory.c

@@ -496,6 +496,9 @@ void free_all_mem(void)
     return;
   entered = true;
 
+  // Set this flag to indicate some errors can be ignored.
+  really_exiting = true;
+
   // Don't want to trigger autocommands from here on.
   block_autocmds();
 

src/nvim/version.c

@@ -574,7 +574,7 @@ static int included_patches[] = {
   // 1869 NA
   // 1868,
   1867,
-  // 1866,
+  1866,
   // 1865 NA
   // 1864 NA
   // 1863 NA