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-rw-r--r--Modules/main.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/Modules/main.c b/Modules/main.c
index 286ad418fe..3809fa4abe 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -2015,6 +2015,7 @@ pymain_read_conf(_PyMain *pymain, _Py_CommandLineDetails *cmdline)
Py_IgnoreEnvironmentFlag = init_ignore_env;
_PyCoreConfig_Clear(&pymain->config);
pymain_clear_cmdline(pymain, cmdline);
+ memset(cmdline, 0, sizeof(*cmdline));
pymain_get_global_config(pymain, cmdline);
/* The encoding changed: read again the configuration