Let's be a bit more explicit about the effects of not catching EAgain.

2 files changed, 8 insertions, 1 deletions

diff --git a/src/BLua.cc b/src/BLua.cc
index 2bc726e..e729d83 100644
--- a/src/BLua.cc
+++ b/src/BLua.cc
@@ -253,7 +253,10 @@ int Balau::LuaStatics::callwrap(lua_State * __L, lua_CFunction func) {
         L.push((void *) &s_signature);
         r = L.yield(L.gettop());
     }
-    catch (Balau::GeneralException & e) {
+    catch (EAgain & e) {
+        L.error("The C callback from Lua has thrown an EAgain - you can't do that, you have to wrap it using Lua::yield. The application will now crash, because this task will stop, but the event in the EAgain will later try to wake it up.");
+    }
+    catch (GeneralException & e) {
         L.error(String("GeneralException: ") + e.getMsg());
     }
 // LuaJIT sucks sometime.
diff --git a/src/Task.cc b/src/Task.cc
index eb6cc7f..a4ec5bc 100644
--- a/src/Task.cc
+++ b/src/Task.cc
@@ -101,6 +101,10 @@ void Balau::Task::coroutine() {
             Printer::elog(E_TASK, "Stackless task %s at %p is task-switching.", getName(), this);
         }
     }
+    catch (EAgain & e) {
+        Printer::log(M_ERROR, "Task %s at %p threw an EAgain - you should catch it and yield; the app will crash now", getName(), this);
+        m_status = FAULTED;
+    }
     catch (GeneralException & e) {
         Printer::log(M_WARNING, "Task %s at %p caused an exception: `%s' - stopping.", getName(), this, e.getMsg());
         const char * details = e.getDetails();