fix: anonymous sid not working

src/nvim/eval.c

@@ -9369,10 +9369,31 @@ static hashtab_T *find_var_ht_dict(const char *name, const size_t name_len, cons
   } else if (*name == 'l' && funccal != NULL) {  // local variable
     *d = &funccal->l_vars;
   } else if (*name == 's'  // script variable
-             && (current_sctx.sc_sid > 0 || current_sctx.sc_sid == SID_STR)
+             && (current_sctx.sc_sid > 0 || current_sctx.sc_sid == SID_STR
+                 || current_sctx.sc_sid == SID_LUA)
              && current_sctx.sc_sid <= ga_scripts.ga_len) {
     // For anonymous scripts without a script item, create one now so script vars can be used
-    if (current_sctx.sc_sid == SID_STR) {
+    if (current_sctx.sc_sid == SID_LUA) {
+      // try to resolve lua filename & line no so it can be shown in lastset messages.
+      nlua_set_sctx(&current_sctx);
+      if (current_sctx.sc_sid != SID_LUA) {
+        // Great we have valid location. Now here this out we'll create a new
+        // script context with the name and lineno of this one. why ?
+        // for behavioral consistency. With this different anonymous exec from
+        // same file can't access each others script local stuff. We need to do
+        // this all other cases except this will act like that otherwise.
+        const LastSet last_set = (LastSet){
+          .script_ctx = current_sctx,
+          .channel_id = LUA_INTERNAL_CALL,
+        };
+        bool should_free;
+        // should_free is ignored as script_sctx will be resolved to a fnmae
+        // & new_script_item will consume it.
+        char_u *sc_name = get_scriptname(last_set, &should_free);
+        new_script_item(sc_name, &current_sctx.sc_sid);
+      }
+    }
+    if (current_sctx.sc_sid == SID_STR || current_sctx.sc_sid == SID_LUA) {
       new_script_item(NULL, &current_sctx.sc_sid);
     }
     *d = &SCRIPT_SV(current_sctx.sc_sid)->sv_dict;

src/nvim/lua/executor.c

@@ -1818,24 +1818,14 @@ void nlua_execute_on_key(int c)
 #endif
 }
 
-// Checks if str is in blacklist array
-static bool is_in_ignorelist(const char *str, char *ignorelist[], int ignorelist_size)
+// Sets the editor "script context" during Lua execution. Used by :verbose.
+// @param[out] current
+void nlua_set_sctx(sctx_T *current)
 {
-  for (int i = 0; i < ignorelist_size; i++) {
-    if (strncmp(ignorelist[i], str, strlen(ignorelist[i])) == 0) {
-      return true;
-    }
+  if (p_verbose <= 0 || current->sc_sid != SID_LUA) {
+    return;
   }
-  return false;
-}
-// Get sctx of current file being sourced if doesn't exist generate it
-static sctx_T *nlua_get_sourcing_sctx(void)
-{
   lua_State *const lstate = global_lstate;
-  sctx_T *retval = (sctx_T *)xmalloc(sizeof(sctx_T));
-  retval->sc_seq = -1;
-  retval->sc_sid = SID_LUA;
-  retval->sc_lnum = -1;
   lua_Debug *info = (lua_Debug *)xmalloc(sizeof(lua_Debug));
 
   // Files where internal wrappers are defined so we can ignore them
@@ -1844,7 +1834,7 @@ static sctx_T *nlua_get_sourcing_sctx(void)
     "vim/_meta.lua",
     "vim/keymap.lua",
   };
-  int blacklist_size = sizeof(ignorelist) / sizeof(ignorelist[0]);
+  int ignorelist_size = sizeof(ignorelist) / sizeof(ignorelist[0]);
 
   for (int level = 1; true; level++) {
     if (lua_getstack(lstate, level, info) != 1) {
@@ -1854,31 +1844,30 @@ static sctx_T *nlua_get_sourcing_sctx(void)
       goto cleanup;
     }
 
-    if (info->what[0] == 'C' || info->source[0] != '@'
-        || is_in_ignorelist(info->source+1, ignorelist, blacklist_size)) {
+    bool is_ignored = false;
+    if (info->what[0] == 'C' || info->source[0] != '@') {
+      is_ignored = true;
+    } else {
+      for (int i = 0; i < ignorelist_size; i++) {
+        if (strncmp(ignorelist[i], info->source+1, strlen(ignorelist[i])) == 0) {
+          is_ignored = true;
+          break;
+        }
+      }
+    }
+    if (is_ignored) {
       continue;
     }
     break;
   }
   char *source_path = fix_fname(info->source + 1);
-  get_current_script_id((char_u *)source_path, retval);
+  get_current_script_id((char_u *)source_path, current);
   xfree(source_path);
-  retval->sc_lnum = info->currentline;
+  current->sc_lnum = info->currentline;
+  current->sc_seq = -1;
 
 cleanup:
   xfree(info);
-  return retval;
-}
-
-// Sets the editor "script context" during Lua execution. Used by :verbose.
-// @param[out] current
-void nlua_set_sctx(sctx_T *current)
-{
-  if (p_verbose > 0 && current->sc_sid == SID_LUA) {
-    sctx_T *lua_sctx = nlua_get_sourcing_sctx();
-    *current = *lua_sctx;
-    xfree(lua_sctx);
-  }
 }
 
 void nlua_do_ucmd(ucmd_T *cmd, exarg_T *eap)

test/functional/ex_cmds/verbose_spec.lua

@@ -38,6 +38,13 @@ function Close_Window() abort\
   wincmd -\
 endfunction\
 ", false)
+
+local ret = vim.api.nvim_exec ("\
+function! s:return80()\
+  return 80\
+endfunction\
+let &tw = s:return80()\
+", true)
 ]])
     exec(':source '..script_file)
   end)
@@ -125,6 +132,14 @@ test_group  FileType
    endfunction]],
        script_location), result)
   end)
+
+  it('"Last set" works with anonymous sid', function()
+    local result = exec_capture(':verbose set tw?')
+    eq(string.format([[
+  textwidth=80
+	Last set from %s line 22]],
+       script_location), result)
+  end)
 end)
 
 describe('lua verbose:', function()