patch 8.2.4871: Vim9: in :def function no error for misplaced rangev8.2.4871

Problem:    Vim9: in :def function no error for using a range with a command
            that does not accept one.
Solution:   Check for the command to accept a range. (closes #10330)

3 files changed, 30 insertions, 0 deletions

diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index dd33a923a..4fa690450 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -67,6 +67,29 @@ def Test_range_only()
   endif
 enddef
 
+def Test_invalid_range()
+  var lines =<< trim END
+      :123 eval 1 + 2
+  END
+  v9.CheckDefAndScriptFailure(lines, 'E481:', 1)
+
+  lines =<< trim END
+      :123 if true
+      endif
+  END
+  v9.CheckDefAndScriptFailure(lines, 'E481:', 1)
+
+  lines =<< trim END
+      :123 echo 'yes'
+  END
+  v9.CheckDefAndScriptFailure(lines, 'E481:', 1)
+
+  lines =<< trim END
+      :123 cd there
+  END
+  v9.CheckDefAndScriptFailure(lines, 'E481:', 1)
+enddef
+
 let g:alist = [7]
 let g:astring = 'text'
 let g:anumber = 123
diff --git a/src/version.c b/src/version.c
index 3f7825eee..f0269e44d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4871,
+/**/
     4870,
 /**/
     4869,
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 8b22a8db2..b0cf6a787 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -3080,6 +3080,11 @@ compile_def_function(
 		ea.forceit = TRUE;
 		p = skipwhite(p + 1);
 	    }
+	    if ((ea.argt & EX_RANGE) == 0 && ea.addr_count > 0)
+	    {
+		emsg(_(e_no_range_allowed));
+		goto erret;
+	    }
 	}
 
 	switch (ea.cmdidx)