diff --git a/configure.py b/configure.py
index 1d49ba0a59..d0fb3d2903 100755
--- a/configure.py
+++ b/configure.py
@@ -189,6 +189,8 @@ arg_parser.add_argument('--with-osv', action = 'store', dest = 'with_osv', defau
                         help = 'Shortcut for compile for OSv')
 arg_parser.add_argument('--dpdk-target', action = 'store', dest = 'dpdk_target', default = '',
                         help = 'Path to DPDK SDK target location (e.g. <DPDK SDK dir>/x86_64-native-linuxapp-gcc)')
+arg_parser.add_argument('--debuginfo', action = 'store', dest = 'debuginfo', type = int, default = 1,
+                        help = 'Enable(1)/disable(0)compiler debug information generation')
 add_tristate(arg_parser, name = 'hwloc', dest = 'hwloc', help = 'hwloc support')
 add_tristate(arg_parser, name = 'xen', dest = 'xen', help = 'Xen support')
 args = arg_parser.parse_args()
@@ -371,7 +373,7 @@ warnings = [w
 
 warnings = ' '.join(warnings)
 
-dbgflag = debug_flag(args.cxx)
+dbgflag = debug_flag(args.cxx) if args.debuginfo else ''
 
 def have_hwloc():
     return try_compile(compiler = args.cxx, source = '#include <hwloc.h>\n#include <numa.h>')
diff --git a/core/future.hh b/core/future.hh
index 9e5a5baf3a..d54c68ddd5 100644
--- a/core/future.hh
+++ b/core/future.hh
@@ -70,6 +70,8 @@ make_task(Func&& func) {
     return std::unique_ptr<task>(new lambda_task<Func>(std::move(func)));
 }
 
+void report_failed_future(std::exception_ptr ex);
+
 //
 // A future/promise pair maintain one logical value (a future_state).
 // To minimize allocations, the value is stored in exactly one of three
@@ -169,10 +171,17 @@ struct future_state {
         _state = state::exception;
         new (&_u.ex) std::exception_ptr(ex);
     }
+    std::exception_ptr get_exception() noexcept {
+        assert(_state == state::exception);
+        // Move ex out so future::~future() knows we've handled it
+        return std::move(_u.ex);
+    }
     std::tuple<T...> get() {
         assert(_state != state::future);
         if (_state == state::exception) {
-            std::rethrow_exception(_u.ex);
+            _state = state::invalid;
+            // Move ex out so future::~future() knows we've handled it
+            std::rethrow_exception(std::move(_u.ex));
         }
         return std::move(_u.value);
     }
@@ -212,6 +221,8 @@ struct future_state<> {
         if (x._u.st < state::exception_min) {
             _u.st = x._u.st;
         } else {
+            // Move ex out so future::~future() knows we've handled it
+            // Moving it will reset us to invalid state
             new (&_u.ex) std::exception_ptr(std::move(x._u.ex));
         }
     }
@@ -249,10 +260,18 @@ struct future_state<> {
     std::tuple<> get() {
         assert(_u.st != state::future);
         if (_u.st >= state::exception_min) {
-            std::rethrow_exception(_u.ex);
+            // Move ex out so future::~future() knows we've handled it
+            // Moving it will reset us to invalid state
+            std::rethrow_exception(std::move(_u.ex));
         }
         return {};
     }
+    std::exception_ptr get_exception() noexcept {
+        assert(_u.st >= state::exception_min);
+        // Move ex out so future::~future() knows we've handled it
+        // Moving it will reset us to invalid state
+        return std::move(_u.ex);
+    }
     void forward_to(promise<>& pr) noexcept;
 };
 
@@ -486,6 +505,9 @@ public:
         if (_promise) {
             _promise->_future = nullptr;
         }
+        if (failed()) {
+            report_failed_future(state()->get_exception());
+        }
     }
     std::tuple<T...> get() {
         return state()->get();
diff --git a/core/reactor.cc b/core/reactor.cc
index 7842647993..1533223c68 100644
--- a/core/reactor.cc
+++ b/core/reactor.cc
@@ -1198,6 +1198,16 @@ void schedule(std::unique_ptr<task> t) {
     engine().add_task(std::move(t));
 }
 
+void report_failed_future(std::exception_ptr exp) {
+    try {
+        std::rethrow_exception(std::move(exp));
+    } catch (std::exception& ex) {
+        std::cerr << "WARNING: exceptional future ignored: " << ex.what() << "\n";
+    } catch (...) {
+        std::cerr << "WARNING: exceptional future ignored\n";
+    }
+}
+
 bool operator==(const ::sockaddr_in a, const ::sockaddr_in b) {
     return (a.sin_addr.s_addr == b.sin_addr.s_addr) && (a.sin_port == b.sin_port);
 }
diff --git a/core/sleep.hh b/core/sleep.hh
new file mode 100644
index 0000000000..24b3f54c34
--- /dev/null
+++ b/core/sleep.hh
@@ -0,0 +1,44 @@
+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership.  You may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/*
+ * Copyright (C) 2015 Cloudius Systems, Ltd.
+ */
+
+#pragma once
+
+#include <chrono>
+#include <functional>
+
+#include "core/shared_ptr.hh"
+#include "core/reactor.hh"
+#include "core/future.hh"
+
+template <typename Clock = std::chrono::high_resolution_clock, typename Rep, typename Period>
+future<> sleep(std::chrono::duration<Rep, Period> dur) {
+    struct sleeper {
+        promise<> done;
+        timer<Clock> tmr;
+        sleeper(std::chrono::duration<Rep, Period> dur)
+            : tmr([this] { done.set_value(); delete this; })
+        {
+            tmr.arm(dur);
+        }
+    };
+    return (new sleeper(dur))->done.get_future();
+}
diff --git a/core/sstring.hh b/core/sstring.hh
index ae6b336a77..5d688e2d52 100644
--- a/core/sstring.hh
+++ b/core/sstring.hh
@@ -178,7 +178,7 @@ public:
 
     size_t find(char_type t, size_t pos = 0) const noexcept {
         const char_type* it = str() + pos;
-        const char_type* end = it + size();
+        const char_type* end = str() + size();
         while (it < end) {
             if (*it == t) {
                 return it - str();
@@ -190,7 +190,7 @@ public:
 
     size_t find(const basic_sstring& s, size_t pos = 0) const noexcept {
         const char_type* it = str() + pos;
-        const char_type* end = it + size();
+        const char_type* end = str() + size();
         const char_type* c_str = s.str();
         const char_type* c_str_end = s.str() + s.size();