fix: fix ASAN detected buffer overflows in awkward-cpp

awkward-cpp/src/cpu-kernels/awkward_ListOffsetArray_drop_none_indexes.cpp

@@ -17,7 +17,10 @@ ERROR awkward_ListOffsetArray_drop_none_indexes(
 
   for (int64_t i = 0; i < length_offsets; i++) {
     offset2 = fromoffsets[i];
-    for (int j = offset1; j < offset2; j++) {
+    if (offset2 > length_indexes) {
+      return failure("offsets[i] > len(content)", i, kSliceNone, FILENAME(__LINE__));
+    }
+    for (int64_t j = offset1; j < offset2; j++) {
         if (noneindexes[j] < 0) {
             nr_of_nones++;
         }

awkward-cpp/src/cpu-kernels/awkward_ListOffsetArray_reduce_nonlocal_preparenext_64.cpp

@@ -36,7 +36,7 @@ ERROR awkward_ListOffsetArray_reduce_nonlocal_preparenext_64(
           *maxnextparents = nextparents[k];
         }
 
-        if (distincts[nextparents[k]] == -1) {
+        if (nextparents[k] < distinctslen && distincts[nextparents[k]] == -1) {
           distincts[nextparents[k]] = j;
           j++;
         }

awkward-cpp/src/cpu-kernels/awkward_RecordArray_reduce_nonlocal_outoffsets_64.cpp

@@ -46,7 +46,7 @@ ERROR awkward_RecordArray_reduce_nonlocal_outoffsets_64(
   }
 
   // Replace unique value with index of appended empty lists
-  for (i = 0; i <= outlength; i++) {
+  for (i = 0; i < outlength; i++) {
     if (outcarry[i] == -1) {
         outcarry[i] = k_sublist++;
     }

tests/test_1904_drop_none.py

@@ -113,7 +113,7 @@ def test_List_ByteMaskedArray_NumpyArray():
 
 def test_ListOffsetArray_ByteMaskedArray_NumpyArray():
     a = ak.contents.listoffsetarray.ListOffsetArray(
-        ak.index.Index(np.array([1, 4, 4, 6, 7], np.int64)),
+        ak.index.Index(np.array([1, 4, 4, 5, 5], np.int64)),
         ak.contents.bytemaskedarray.ByteMaskedArray(
             ak.index.Index(np.array([1, 0, 1, 0, 1], np.int8)),
             ak.contents.numpyarray.NumpyArray(np.array([1.1, 2.2, 3.3, 4.4, 5.5, 6.6])),