Index: libcfa/src/concurrency/invoke.h
===================================================================
--- libcfa/src/concurrency/invoke.h	(revision f23b685159eb22b124d2036074b1dcf5a7f5b4a6)
+++ libcfa/src/concurrency/invoke.h	(revision 70a1c3aed5e5b84a329ddc71a02c60806fd80216)
@@ -80,10 +80,24 @@
 
 	struct coroutine_desc {
-		struct coStack_t stack;							// stack information of the coroutine
-		const char * name;								// textual name for coroutine/task, initialized by uC++ generated code
-		int errno_;										// copy of global UNIX variable errno
-		enum coroutine_state state;						// current execution status for coroutine
-		struct coroutine_desc * starter;				// first coroutine to resume this one
-		struct coroutine_desc * last;					// last coroutine to resume this one
+		// stack information of the coroutine
+		struct coStack_t stack;
+
+		// textual name for coroutine/task, initialized by uC++ generated code
+		const char * name;
+
+		// copy of global UNIX variable errno
+		int errno_;
+
+		// current execution status for coroutine
+		enum coroutine_state state;
+		// first coroutine to resume this one
+		struct coroutine_desc * starter;
+
+		// last coroutine to resume this one
+		struct coroutine_desc * last;
+
+		// If non-null stack must be unwound with this exception
+		struct _Unwind_Exception * cancellation;
+
 	};