diff --git a/include/boost/stacktrace.hpp b/include/boost/stacktrace.hpp
index 78e527b..85b9ec0 100644
--- a/include/boost/stacktrace.hpp
+++ b/include/boost/stacktrace.hpp
@@ -12,8 +12,6 @@
 #   pragma once
 #endif
 
-#include <boost/core/noncopyable.hpp>
-
 #include <boost/iterator/iterator_facade.hpp>
 #include <boost/assert.hpp>
 
@@ -101,8 +99,12 @@ class stacktrace {
     /// @endcond
 
 public:
+#ifdef BOOST_STACKTRACE_DOXYGEN_INVOKED
     /// @brief Random access iterator that returns frame_view.
-    class iterator;
+    typedef implementation_specific iterator;
+#else
+    class iterator; // forward declaration
+#endif
 
     class frame_view {
     /// @cond
@@ -222,10 +224,9 @@ public:
     /// is the function index where stacktrace was constructed and
     /// index close to this->size() contains function `main()`.
     /// @returns frame_view that references the actual frame info, stored inside *this.
-    /// @throws std::bad_alloc if not enough memory to construct resulting string.
     ///
     /// @b Complexity: Amortized O(1), O(1) for noop backend.
-    frame_view operator[](std::size_t frame_no) const {
+    frame_view operator[](std::size_t frame_no) const BOOST_NOEXCEPT {
         return *(cbegin() + frame_no);
     }
 
@@ -277,27 +278,29 @@ public:
     const_reverse_iterator crend() const BOOST_NOEXCEPT { return const_reverse_iterator( const_iterator(this, size()) ); }
 };
 
-/// Comparison operators that order in a platform dependant order and have amortized O(1) complexity; O(size()) worst case conmlexity.
+/// Comparison operators that order in a platform dependant order and have amortized O(1) complexity; O(size()) worst case complexity.
 inline bool operator> (const stacktrace& lhs, const stacktrace& rhs) BOOST_NOEXCEPT { return rhs < lhs; }
 inline bool operator<=(const stacktrace& lhs, const stacktrace& rhs) BOOST_NOEXCEPT { return !(lhs > rhs); }
 inline bool operator>=(const stacktrace& lhs, const stacktrace& rhs) BOOST_NOEXCEPT { return !(lhs < rhs); }
 inline bool operator!=(const stacktrace& lhs, const stacktrace& rhs) BOOST_NOEXCEPT { return !(lhs == rhs); }
 
+/// Comparison operators that order in a platform dependant order and have O(1) complexity.
+inline bool operator< (const stacktrace::frame_view& lhs, const stacktrace::frame_view& rhs) BOOST_NOEXCEPT { return lhs.address() < rhs.address(); }
+inline bool operator> (const stacktrace::frame_view& lhs, const stacktrace::frame_view& rhs) BOOST_NOEXCEPT { return rhs < lhs; }
+inline bool operator<=(const stacktrace::frame_view& lhs, const stacktrace::frame_view& rhs) BOOST_NOEXCEPT { return !(lhs > rhs); }
+inline bool operator>=(const stacktrace::frame_view& lhs, const stacktrace::frame_view& rhs) BOOST_NOEXCEPT { return !(lhs < rhs); }
+inline bool operator==(const stacktrace::frame_view& lhs, const stacktrace::frame_view& rhs) BOOST_NOEXCEPT { return lhs.address() == rhs.address(); }
+inline bool operator!=(const stacktrace::frame_view& lhs, const stacktrace::frame_view& rhs) BOOST_NOEXCEPT { return !(lhs == rhs); }
+
+
 /// Hashing support, O(1) complexity.
 inline std::size_t hash_value(const stacktrace& st) BOOST_NOEXCEPT {
     return st.hash_code();
 }
 
-/// Outputs stacktrace::frame in a human readable format to output stream.
-template <class CharT, class TraitsT>
-std::basic_ostream<CharT, TraitsT>& operator<<(std::basic_ostream<CharT, TraitsT>& os, const stacktrace::frame_view& f) {
-    os << f.name();
-
-    if (f.source_line()) {
-        return os << '\t' << f.source_file() << ':' << f.source_line();
-    }
-
-    return os;
+/// Hashing support, O(1) complexity.
+inline std::size_t hash_value(const stacktrace::frame_view& f) BOOST_NOEXCEPT {
+    return reinterpret_cast<std::size_t>(f.address());
 }
 
 /// Outputs stacktrace in a human readable format to output stream.
@@ -317,6 +320,18 @@ std::basic_ostream<CharT, TraitsT>& operator<<(std::basic_ostream<CharT, TraitsT
     return os;
 }
 
+/// Outputs stacktrace::frame in a human readable format to output stream.
+template <class CharT, class TraitsT>
+std::basic_ostream<CharT, TraitsT>& operator<<(std::basic_ostream<CharT, TraitsT>& os, const stacktrace::frame_view& f) {
+    os << f.name();
+
+    if (f.source_line()) {
+        return os << '\t' << f.source_file() << ':' << f.source_line();
+    }
+
+    return os;
+}
+
 }} // namespace boost::stacktrace
 
 /// @cond
diff --git a/include/boost/stacktrace/detail/backtrace_holder_libunwind.hpp b/include/boost/stacktrace/detail/backtrace_holder_libunwind.hpp
index 3986635..96a6a10 100644
--- a/include/boost/stacktrace/detail/backtrace_holder_libunwind.hpp
+++ b/include/boost/stacktrace/detail/backtrace_holder_libunwind.hpp
@@ -24,21 +24,34 @@
 
 namespace boost { namespace stacktrace { namespace detail {
 
+struct bt_pair {
+    std::string name;
+    const void* addr;
+};
+
+inline bool operator< (const bt_pair& lhs, const bt_pair& rhs) BOOST_NOEXCEPT {
+    return lhs.addr < rhs.addr;
+}
+
+inline bool operator== (const bt_pair& lhs, const bt_pair& rhs) BOOST_NOEXCEPT {
+    return lhs.addr == rhs.addr;
+}
+
 struct backtrace_holder {
     std::size_t frames_count;
-    boost::shared_ptr<std::string[]> frames;
+    boost::shared_ptr<bt_pair[]> frames;
 
     inline std::size_t size() const BOOST_NOEXCEPT {
         return frames_count;
     }
 
     inline const void* get_address(std::size_t frame) const BOOST_NOEXCEPT {
-        return &frames[frame];
+        return frames[frame].addr;
     }
 
     inline std::string get_frame(std::size_t frame) const {
         if (frame < frames_count) {
-            return frames[frame];
+            return frames[frame].name;
         } else {
             return std::string();
         }
@@ -48,7 +61,7 @@ struct backtrace_holder {
         std::string res;
         unw_word_t offp;
         char data[256];
-        const int ret = unw_get_proc_name (&cursor, data, sizeof(data) / sizeof(char), &offp);
+        const int ret = unw_get_proc_name(&cursor, data, sizeof(data) / sizeof(char), &offp);
 
         if (ret == -UNW_ENOMEM) {
             res.resize(sizeof(data) * 2);
diff --git a/include/boost/stacktrace/detail/stacktrace_libunwind.hpp b/include/boost/stacktrace/detail/stacktrace_libunwind.hpp
index e5687e6..af53a7f 100644
--- a/include/boost/stacktrace/detail/stacktrace_libunwind.hpp
+++ b/include/boost/stacktrace/detail/stacktrace_libunwind.hpp
@@ -48,11 +48,15 @@ stacktrace::stacktrace() BOOST_NOEXCEPT
     }
 
     BOOST_TRY {
-        bt.frames = boost::make_shared<std::string[]>(bt.frames_count);
+        bt.frames = boost::make_shared<boost::stacktrace::detail::bt_pair[]>(bt.frames_count);
         std::size_t i = 0;
         while (unw_step(&cursor) > 0){
-            bt.frames[i] = boost::stacktrace::detail::backtrace_holder::get_frame_impl(cursor);
-            boost::hash_combine(hash_code_, bt.frames[i]);
+            bt.frames[i].name = boost::stacktrace::detail::backtrace_holder::get_frame_impl(cursor);
+            unw_proc_info_t inf;
+            const int res = unw_get_proc_info(&cursor, &inf);
+            (void)res;
+            bt.frames[i].addr = reinterpret_cast<void*>(inf.start_ip ? inf.start_ip : inf.gp);
+            boost::hash_combine(hash_code_, bt.frames[i].name);
             ++ i;
         }
     } BOOST_CATCH(...) {}
diff --git a/test/test.cpp b/test/test.cpp
index 5dbd997..b4d324e 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -168,6 +168,15 @@ void test_frame_view() {
 
     stacktrace::frame_view fv = nst[1];
     BOOST_TEST(st[1].name() != fv.name());
+    BOOST_TEST(st[1] != fv);
+    BOOST_TEST(st[1] == st[1]);
+    BOOST_TEST(st[1] <= st[1]);
+    BOOST_TEST(st[1] >= st[1]);
+    BOOST_TEST(st[1] < fv || st[1] > fv);
+
+    BOOST_TEST(hash_value(st[1]) != hash_value(fv));
+    fv = st[1];
+    BOOST_TEST(hash_value(st[1]) == hash_value(fv));
 }
 
 int main() {