diff --git a/src/Reactor/SubzeroReactor.cpp b/src/Reactor/SubzeroReactor.cpp
index f7b0e32..650fc94 100644
--- a/src/Reactor/SubzeroReactor.cpp
+++ b/src/Reactor/SubzeroReactor.cpp
@@ -411,6 +411,8 @@
 		::function->setFunctionName(Ice::GlobalString::createWithString(::context, asciiName));
 
 		::function->translate();
+		assert(!::function->hasError());
+
 		auto *globals = ::function->getGlobalInits().release();
 
 		if(globals && !globals->empty())