From 051b0ff30d0645f6f5512cb0653a7049a3f17db9 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 30 Dec 2025 22:11:05 +0530
Subject: [PATCH] Free C locale on exit

---
 kitty/colors.c     | 6 ++----
 kitty/data-types.c | 6 ++++++
 kitty/data-types.h | 2 ++
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/kitty/colors.c b/kitty/colors.c
index 37ffc6b9a..fa83e6473 100644
--- a/kitty/colors.c
+++ b/kitty/colors.c
@@ -8,11 +8,10 @@
 #include "state.h"
 #include <structmember.h>
 #include "colors.h"
-#include <locale.h>
 #ifdef __APPLE__
+// Needed for strod_l
 #include <xlocale.h>
 #endif
-locale_t c_locale;
 
 
 static uint32_t FG_BG_256[256] = {
@@ -806,7 +805,7 @@ static bool
 parse_double(const char *src, double *out) {
     char *endptr;
     errno = 0;
-    *out = strtod_l(src, &endptr, c_locale);
+    *out = strtod_l(src, &endptr, get_c_locale());
     return endptr != src && *endptr == 0 && errno == 0;
 }
 
@@ -1128,7 +1127,6 @@ static PyMethodDef module_methods[] = {
 };
 
 int init_ColorProfile(PyObject *module) {\
-    c_locale = newlocale(LC_NUMERIC_MASK, "C", (locale_t)0);
     if (PyType_Ready(&ColorProfile_Type) < 0) return 0;
     if (PyModule_AddObject(module, "ColorProfile", (PyObject *)&ColorProfile_Type) != 0) return 0;
     Py_INCREF(&ColorProfile_Type);
diff --git a/kitty/data-types.c b/kitty/data-types.c
index 687dccd87..c7d6ec0e3 100644
--- a/kitty/data-types.c
+++ b/kitty/data-types.c
@@ -617,6 +617,9 @@ py_timed_debug_print(PyObject *self UNUSED, PyObject *args) {
     Py_RETURN_NONE;
 }
 
+static locale_t c_locale = 0;
+locale_t get_c_locale(void) { return c_locale; }
+
 static PyObject*
 py_run_atexit_cleanup_functions(PyObject *self UNUSED, PyObject *args UNUSED) {
     run_at_exit_cleanup_functions();
@@ -726,6 +729,7 @@ static PyMethodDef module_methods[] = {
 
 static void
 free_fast_data_types_module(void *m UNUSED) {
+    freelocale(c_locale);
     run_at_exit_cleanup_functions();
 }
 
@@ -877,6 +881,8 @@ PyInit_fast_data_types(void) {
     if (PyModule_AddObject(m, "StreamingBase64Decoder", (PyObject *) &StreamingBase64Decoder_Type) < 0) return NULL;
     if (PyType_Ready(&StreamingBase64Encoder_Type) < 0) return NULL;
     if (PyModule_AddObject(m, "StreamingBase64Encoder", (PyObject *) &StreamingBase64Encoder_Type) < 0) return NULL;
+    c_locale = newlocale(LC_NUMERIC_MASK, "C", (locale_t)0);
+    if (!c_locale) { PyErr_NoMemory(); return NULL; }
 
     return m;
 }
diff --git a/kitty/data-types.h b/kitty/data-types.h
index fec7ee97e..8111a2cb0 100644
--- a/kitty/data-types.h
+++ b/kitty/data-types.h
@@ -18,6 +18,7 @@
 #include <stdbool.h>
 #include <poll.h>
 #include <pthread.h>
+#include <locale.h>
 #include "glfw-wrapper.h"
 #include "banned.h"
 // Required minimum OpenGL version
@@ -331,6 +332,7 @@ void focus_in_event(void);
 void scroll_event(double, double, int, int);
 void on_key_input(const GLFWkeyevent *ev);
 void request_window_attention(id_type, bool);
+locale_t get_c_locale(void);
 #ifndef __APPLE__
 void play_canberra_sound(const char *which_sound, const char *event_id, bool is_path, const char *role, const char *theme_name);
 #endif