patch 8.2.2645: using inline function is not properly tested

Problem:    Using inline function is not properly tested.
Solution:   Add test cases, esp. for errors.  Minor code improvements.

src/errors.h

@@ -381,3 +381,5 @@ EXTERN char e_missing_end_block[]
 	INIT(= N_("E1171: Missing } after inline function"));
 EXTERN char e_cannot_use_default_values_in_lambda[]
 	INIT(= N_("E1172: Cannot use default values in a lambda"));
+EXTERN char e_text_found_after_enddef_str[]
+	INIT(= N_("E1173: Text found after enddef: %s"));

src/testdir/test_vim9_expr.vim

@@ -1961,6 +1961,11 @@ def Test_expr7_lambda_block()
           return 'no'
         })
       assert_equal(['no', 'yes', 'no'], dll)
+
+      sandbox var Safe = (nr: number): number => {
+          return nr + 7
+        }
+      assert_equal(10, Safe(3))
   END
   CheckDefAndScriptSuccess(lines)
 
@@ -1968,6 +1973,34 @@ def Test_expr7_lambda_block()
       map([1, 2], (k, v) => { redrawt })
   END
   CheckDefAndScriptFailure(lines, 'E488')
+
+  lines =<< trim END
+      var Func = (nr: int) => {
+              echo nr
+            }
+  END
+  CheckDefAndScriptFailure(lines, 'E1010', 1)
+
+  lines =<< trim END
+      var Func = (nr: number): int => {
+              return nr
+            }
+  END
+  CheckDefAndScriptFailure(lines, 'E1010', 1)
+
+  lines =<< trim END
+      var Func = (nr: number): int => {
+              return nr
+  END
+  CheckDefAndScriptFailure(lines, 'E1171', 1)  # line nr is function start
+
+  lines =<< trim END
+      vim9script
+      var Func = (nr: number): int => {
+          var ll =<< ENDIT
+             nothing
+  END
+  CheckScriptFailure(lines, 'E1145: Missing heredoc end marker: ENDIT', 2)
 enddef
 
 def NewLambdaWithComments(): func

src/testdir/test_vim9_func.vim

@@ -86,6 +86,16 @@ def Test_endfunc_enddef()
     enddef
   END
   CheckScriptFailure(lines, 'E1152:', 4)
+
+  lines =<< trim END
+    def Ok()
+      echo 'hello'
+    enddef | echo 'there'
+    def Bad()
+      echo 'hello'
+    enddef there
+  END
+  CheckScriptFailure(lines, 'E1173: Text found after enddef: there', 6)
 enddef
 
 def Test_missing_endfunc_enddef()

src/userfunc.c

@@ -731,13 +731,16 @@ get_function_body(
 		    else if (line_arg != NULL && *skipwhite(line_arg) != NUL)
 			nextcmd = line_arg;
 		    else if (*p != NUL && *p != (vim9_function ? '#' : '"')
-					&& p_verbose > 0
-					&& eap->cmdidx != CMD_block)
-			give_warning2(eap->cmdidx == CMD_def
-			    ? (char_u *)_("W1001: Text found after :enddef: %s")
-			    : (char_u *)_("W22: Text found after :endfunction: %s"),
-			     p, TRUE);
-		    if (nextcmd != NULL)
+					   && (vim9_function || p_verbose > 0))
+		    {
+			if (eap->cmdidx == CMD_def)
+			    semsg(_(e_text_found_after_enddef_str), p);
+			else
+			    give_warning2((char_u *)
+				   _("W22: Text found after :endfunction: %s"),
+				   p, TRUE);
+		    }
+		    if (nextcmd != NULL && *skipwhite(nextcmd) != NUL)
 		    {
 			// Another command follows. If the line came from "eap"
 			// we can simply point into it, otherwise we need to

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2645,
 /**/
     2644,
 /**/