From ff9d9711d71a7bbef24ba1b403f49c4b140bd408 Mon Sep 17 00:00:00 2001
From: Campbell Barton <campbell@blender.org>
Date: Mon, 7 Oct 2024 13:00:52 +1100
Subject: [PATCH] Fix crash using "~" in the file selector when the "home" is
 null

---
 source/blender/editors/space_file/file_ops.cc | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/source/blender/editors/space_file/file_ops.cc b/source/blender/editors/space_file/file_ops.cc
index ab6213624b9..ae874408934 100644
--- a/source/blender/editors/space_file/file_ops.cc
+++ b/source/blender/editors/space_file/file_ops.cc
@@ -2764,12 +2764,18 @@ static void file_expand_directory(bContext *C)
       /* While path handling expansion typically doesn't support home directory expansion
        * in Blender, this is a convenience to be able to type in a single character.
        * Even though this is a UNIX convention, it's harmless to expand on WIN32 as well. */
-      char tmpstr[sizeof(params->dir) - 1];
-      STRNCPY(tmpstr, params->dir + 1);
-      BLI_path_join(params->dir, sizeof(params->dir), BKE_appdir_folder_home(), tmpstr);
+      if (const char *home_dir = BKE_appdir_folder_home()) {
+        char tmpstr[sizeof(params->dir) - 1];
+        STRNCPY(tmpstr, params->dir + 1);
+        BLI_path_join(params->dir, sizeof(params->dir), home_dir, tmpstr);
+      }
+      else {
+        /* Fall back to the default root. */
+        params->dir[0] = '\0';
+      }
     }
 
-    else if (params->dir[0] == '\0')
+    if (params->dir[0] == '\0')
 #ifndef WIN32
     {
       params->dir[0] = '/';