BUG: Fix memory leak in to_json for datetime64 objects

swt2c · swt2c · commit 87a7783e122b · 2025-08-29T10:00:16.000-04:00
diff --git a/pandas/_libs/src/vendored/ujson/python/objToJSON.c b/pandas/_libs/src/vendored/ujson/python/objToJSON.c
@@ -347,7 +347,8 @@ static const char *PyDateTimeToIsoCallback(JSOBJ obj, JSONTypeContext *tc,
   }
 
   NPY_DATETIMEUNIT base = ((PyObjectEncoder *)tc->encoder)->datetimeUnit;
-  return PyDateTimeToIso(obj, base, len);
+  GET_TC(tc)->cStr = PyDateTimeToIso(obj, base, len);
+  return GET_TC(tc)->cStr;
 }
 
 static const char *PyTimeToJSON(JSOBJ _obj, JSONTypeContext *tc,

Original file line number	Diff line number	Diff line change
`@@ -347,7 +347,8 @@ static const char PyDateTimeToIsoCallback(JSOBJ obj, JSONTypeContext tc,`
`347`	`347`	`}`
`348`	`348`
`349`	`349`	`NPY_DATETIMEUNIT base = ((PyObjectEncoder *)tc->encoder)->datetimeUnit;`
`350`		`- return PyDateTimeToIso(obj, base, len);`
	`350`	`+ GET_TC(tc)->cStr = PyDateTimeToIso(obj, base, len);`
	`351`	`+ return GET_TC(tc)->cStr;`
`351`	`352`	`}`
`352`	`353`
`353`	`354`	`static const char PyTimeToJSON(JSOBJ _obj, JSONTypeContext tc,`