Index: indirect_streambuf.hpp
===================================================================
--- indirect_streambuf.hpp	(revision 81622)
+++ indirect_streambuf.hpp	(working copy)
@@ -17,6 +17,7 @@
 #include <cassert>
 #include <exception>
 #include <typeinfo>
+#include <cxxabi-forced.h>
 #include <boost/config.hpp>                      // Member template friends.
 #include <boost/detail/workaround.hpp>
 #include <boost/iostreams/constants.hpp>
@@ -314,6 +315,8 @@
         sync_impl();
         obj().flush(next_);
         return 0;
+    } catch (__cxxabiv1::__forced_unwind&) {
+        __throw_exception_again;
     } catch (...) { return -1; }
 }
 
@@ -323,6 +326,8 @@
     try { // sync() is no-throw.
         sync_impl();
         return obj().flush(next_);
+    } catch (__cxxabiv1::__forced_unwind&) {
+        __throw_exception_again;
     } catch (...) { return false; }
 }