Just keep the same exception_ptr (no copy).

See https://stackoverflow.com/q/37249698 or https://stackoverflow.com/q/30580128

Let's see if it helps for issue simgrid/simgrid#27.

diff --git a/src/kernel/activity/CommImpl.cpp b/src/kernel/activity/CommImpl.cpp
index 4020b9c..8d6c7e3 100644 (file)
--- a/src/kernel/activity/CommImpl.cpp
+++ b/src/kernel/activity/CommImpl.cpp
@@ -692,8 +692,7 @@ void CommImpl::finish()
       try {
         std::rethrow_exception(simcall->issuer->exception_);
       } catch (simgrid::Exception& e) {
-        e.value                     = rank;
-        simcall->issuer->exception_ = std::make_exception_ptr(e);
+        e.value = rank;
       }
     }