# HG changeset patch
# User Christian Brabandt <cb@256bit.org>
# Date 1710578704 -3600
# Node ID 7de5ae6a051864ee4d6b206922e520d9a9f277ec
# Parent  7a3de23515d67aef2d96c72eafb5f92f57ae15f1
patch 9.1.0182: Can define function with invalid name inside 'formatexpr'

Commit: https://github.com/vim/vim/commit/6a04bf5ee523b2d6d01d7290e356a30de219f465
Author: zeertzjq <zeertzjq@outlook.com>
Date:   Sat Mar 16 09:39:06 2024 +0100

    patch 9.1.0182: Can define function with invalid name inside 'formatexpr'

    Problem:  Can define function with invalid name inside 'formatexpr'.
    Solution: Use goto instead of checking for did_emsg later.
              (zeertzjq)

    closes: #14209

    Signed-off-by: zeertzjq <zeertzjq@outlook.com>
    Signed-off-by: Christian Brabandt <cb@256bit.org>

diff --git a/src/testdir/test_user_func.vim b/src/testdir/test_user_func.vim
--- a/src/testdir/test_user_func.vim
+++ b/src/testdir/test_user_func.vim
@@ -968,4 +968,23 @@ func Test_multidefer_with_exception()
   delfunc Foo
 endfunc
 
+func Test_func_curly_brace_invalid_name()
+  func Fail()
+    func Foo{'()'}bar()
+    endfunc
+  endfunc
+
+  call assert_fails('call Fail()', 'E475: Invalid argument: Foo()bar')
+
+  silent! call Fail()
+  call assert_equal([], getcompletion('Foo', 'function'))
+
+  set formatexpr=Fail()
+  normal! gqq
+  call assert_equal([], getcompletion('Foo', 'function'))
+
+  set formatexpr&
+  delfunc Fail
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/userfunc.c b/src/userfunc.c
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -4977,7 +4977,10 @@ define_function(
 					: eval_isnamec(name_base[i])); ++i)
 		;
 	    if (name_base[i] != NUL)
+	    {
 		emsg_funcname(e_invalid_argument_str, arg);
+		goto ret_free;
+	    }
 
 	    // In Vim9 script a function cannot have the same name as a
 	    // variable.
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    182,
+/**/
     181,
 /**/
     180,