1 files changed, 8 insertions, 4 deletions
diff --git a/host/lib/usrp/b200/b200_impl.cpp b/host/lib/usrp/b200/b200_impl.cpp
index 0b4eccd5e..78edec31c 100644
--- a/host/lib/usrp/b200/b200_impl.cpp
+++ b/host/lib/usrp/b200/b200_impl.cpp
@@ -33,6 +33,7 @@
 #include <boost/lexical_cast.hpp>
 #include <boost/functional/hash.hpp>
 #include <boost/make_shared.hpp>
+#include <boost/weak_ptr.hpp>
 #include <cstdio>
 #include <ctime>
 #include <cmath>
@@ -730,9 +731,12 @@ b200_impl::~b200_impl(void)
  * setup radio control objects
  **********************************************************************/
 
-void lambda_set_bool_prop(property_tree::sptr tree, fs_path path, bool value, double)
+void lambda_set_bool_prop(boost::weak_ptr<property_tree> tree_wptr, fs_path path, bool value, double)
 {
-    tree->access<bool>(path).set(value);
+    property_tree::sptr tree = tree_wptr.lock();
+    if (tree) {
+        tree->access<bool>(path).set(value);
+    }
 }
 
 void b200_impl::setup_radio(const size_t dspno)
@@ -796,7 +800,7 @@ void b200_impl::setup_radio(const size_t dspno)
     _tree->create<bool>(rx_dsp_path / "rate" / "set").set(false);
     _tree->access<double>(rx_dsp_path / "rate" / "value")
         .set_coercer(boost::bind(&b200_impl::coerce_rx_samp_rate, this, perif.ddc, dspno, _1))
-        .add_coerced_subscriber(boost::bind(&lambda_set_bool_prop, _tree, rx_dsp_path / "rate" / "set", true, _1))
+        .add_coerced_subscriber(boost::bind(&lambda_set_bool_prop, boost::weak_ptr<property_tree>(_tree), rx_dsp_path / "rate" / "set", true, _1))
         .add_coerced_subscriber(boost::bind(&b200_impl::update_rx_samp_rate, this, dspno, _1))
     ;
     _tree->create<stream_cmd_t>(rx_dsp_path / "stream_cmd")
@@ -812,7 +816,7 @@ void b200_impl::setup_radio(const size_t dspno)
     _tree->create<bool>(tx_dsp_path / "rate" / "set").set(false);
     _tree->access<double>(tx_dsp_path / "rate" / "value")
         .set_coercer(boost::bind(&b200_impl::coerce_tx_samp_rate, this, perif.duc, dspno, _1))
-        .add_coerced_subscriber(boost::bind(&lambda_set_bool_prop, _tree, tx_dsp_path / "rate" / "set", true, _1))
+        .add_coerced_subscriber(boost::bind(&lambda_set_bool_prop, boost::weak_ptr<property_tree>(_tree), tx_dsp_path / "rate" / "set", true, _1))
         .add_coerced_subscriber(boost::bind(&b200_impl::update_tx_samp_rate, this, dspno, _1))
     ;