Index: libcfa/src/bits/locks.hfa
===================================================================
--- libcfa/src/bits/locks.hfa	(revision a77496cbc62f805fc69d3c3f9abd928bfccc0e4b)
+++ libcfa/src/bits/locks.hfa	(revision e96e439fee7afae6706b108ea22bda2bb315b052)
@@ -357,5 +357,12 @@
 				struct oneshot * expected = this.ptr;
 				// was this abandoned?
-				if( expected == 3p ) { free( &this ); return false; }
+				#if defined(__GNUC__) && __GNUC__ >= 7
+					#pragma GCC diagnostic push
+					#pragma GCC diagnostic ignored "-Wfree-nonheap-object"
+				#endif
+					if( expected == 3p ) { free( &this ); return false; }
+				#if defined(__GNUC__) && __GNUC__ >= 7
+					#pragma GCC diagnostic pop
+				#endif
 
 				/* paranoid */ verify( expected != 1p ); // Future is already fulfilled, should not happen