fix: 修复部分程序无法用utf-8解码和asan程序未上传时报错的问题

validation.py

@@ -50,7 +50,7 @@ def exec_command(crashes_collection, usage, command, seed_id: ObjectId):
     error_cause = ''
     process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
     _, errs = process.communicate()
-    errs = str(errs, "utf-8")
+    errs = str(errs, "utf-8", errors='ignore')
     if usage == "valgrind":
         err_data = ''
         search_at_count = 0
@@ -152,6 +152,7 @@ def main(argv):
         fs = GridFS(default_db, fs_name)
         # 根据ObjectId查找文件
         print(software["asan_file"])
+        if software["asan_file"] is not None:
             asan_file_data = fs.get(software["asan_file"])
             if asan_file_data:
                 # 确保下载目录存在