diff --git a/CMakeLists.txt b/CMakeLists.txt
index 72fe5df..8d828dc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -69,11 +69,16 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
 add_compile_options(-Wall)
-add_compile_options(-stdlib=libc++)
 add_compile_options(-g)
 add_compile_options(-O)
+
+add_compile_options(-stdlib=libc++)
 add_link_options(-stdlib=libc++)
 
+# add_compile_options(-fno-omit-frame-pointer)
+# add_compile_options(-fsanitize=address)
+# add_link_options(-fsanitize=address)
+
 # Add our dependencies
 #
 add_stream()
diff --git a/include/core/sort/record_iterator.h b/include/core/sort/record_iterator.h
index 0d83abf..870a10f 100644
--- a/include/core/sort/record_iterator.h
+++ b/include/core/sort/record_iterator.h
@@ -2,6 +2,7 @@
 //
 
 #pragma once
+#include <iostream>
 #include <iterator>
 #include <algorithm>
 
@@ -76,7 +77,7 @@ struct RecordIterator {
     struct stack_value_type {
 	stack_value_type(reference r)
 	    : size_(r.size())
-	    , data_(use_stack() ? &arr[0] : (storage_pointer)std::malloc(r.size())) {
+	    , data_(use_stack() ? &arr[0] : (storage_pointer)std::malloc(sizeof(T) * r.size())) {
 	    std::copy(r.data(), r.data() + r.size(), data_);
 	}
 
@@ -121,7 +122,7 @@ struct RecordIterator {
 
     struct heap_value_type {
 	heap_value_type(reference r)
-	    : data_((storage_pointer)std::malloc(r.size())),
+	    : data_((storage_pointer)std::malloc(sizeof(T) * r.size())),
 	      size_(r.size()) {
 	    std::copy(r.data(), r.data() + r.size(), data_);
 	}
diff --git a/src/tools/example0.cpp b/src/tools/example0.cpp
index 8af37f2..a7b02b2 100644
--- a/src/tools/example0.cpp
+++ b/src/tools/example0.cpp
@@ -24,7 +24,7 @@ void output_records(const std::vector<int>& data, int nrows, int ncols) {
 
 int main(int argc, const char *argv[]) {
     // Generate 10k records each with 7 integer numbered sequentially.
-    int nrows = 8, ncols = 5;
+    int nrows = 9, ncols = 5;
     std::vector<int> data(nrows * ncols);
     std::generate(data.begin(), data.end(), [n=0]() mutable { return n++; });
     cout << endl << "sequential: " << endl;
@@ -36,7 +36,9 @@ int main(int argc, const char *argv[]) {
     output_records(data, nrows, ncols);
     
     // Sort the records
-    std::sort(begin_record(data, ncols), end_record(data, ncols),
+    RecordIterator<int, false, true> begin(data.data(), ncols);
+    RecordIterator<int, false, true> end(begin + nrows);
+    std::sort(begin, end,
 	      [](const int *a, const int *b) {
 		  return a[0] < b[0];
 	      });