BUG: Fix memory leak in Rolling.min and Rolling.max (pandas-dev#25893)

Author: ArtificialQualia

doc/source/whatsnew/v0.25.0.rst

@@ -372,6 +372,7 @@ Groupby/Resample/Rolling
 - Bug in :func:`pandas.core.groupby.GroupBy.agg` when applying a aggregation function to timezone aware data (:issue:`23683`)
 - Bug in :func:`pandas.core.groupby.GroupBy.first` and :func:`pandas.core.groupby.GroupBy.last` where timezone information would be dropped (:issue:`21603`)
 - Ensured that ordering of outputs in ``groupby`` aggregation functions is consistent across all versions of Python (:issue:`25692`)
+- Bug in :meth:`pandas.core.window.Rolling.min` and :meth:`pandas.core.window.Rolling.max` that caused a memory leak (:issue:`25893`)
 
 
 Reshaping

pandas/_libs/window.pyx

@@ -1251,7 +1251,7 @@ cdef _roll_min_max(ndarray[numeric] values, int64_t win, int64_t minp,
     ignoring NaNs.
     """
     cdef:
-        ndarray[int64_t] starti, endi
+        int64_t[:] starti, endi
         int64_t N
         bint is_variable
 
@@ -1267,8 +1267,8 @@ cdef _roll_min_max(ndarray[numeric] values, int64_t win, int64_t minp,
 
 
 cdef _roll_min_max_variable(ndarray[numeric] values,
-                            ndarray[int64_t] starti,
-                            ndarray[int64_t] endi,
+                            int64_t[:] starti,
+                            int64_t[:] endi,
                             int64_t N,
                             int64_t win,
                             int64_t minp,
@@ -1349,8 +1349,8 @@ cdef _roll_min_max_variable(ndarray[numeric] values,
 
 
 cdef _roll_min_max_fixed(ndarray[numeric] values,
-                         ndarray[int64_t] starti,
-                         ndarray[int64_t] endi,
+                         int64_t[:] starti,
+                         int64_t[:] endi,
                          int64_t N,
                          int64_t win,
                          int64_t minp,