}
OPTBLD_INLINE void ExecutionContext::iopCheckProp(IOP_ARGS) {
+diff -ur hhvm-HHVM-3.3.7/hphp/runtime/vm/jit/code-gen-x64.cpp hhvm-HHVM-3.3.7.gcc6/hphp/runtime/vm/jit/code-gen-x64.cpp
+--- hhvm-HHVM-3.3.7/hphp/runtime/vm/jit/code-gen-x64.cpp 2015-06-30 21:56:17.000000000 +0200
++++ hhvm-HHVM-3.3.7.gcc6/hphp/runtime/vm/jit/code-gen-x64.cpp 2017-03-04 10:55:38.602703009 +0100
+@@ -3785,7 +3785,8 @@
+ : calleeNumParams + 1;
+ v << kpcall{extra->knownPrologue, extra->callee, prologIndex};
+ } else {
+- v << call{extra->knownPrologue};
++ RegSet argRegs;
++ v << call{extra->knownPrologue, argRegs};
+ }
+ return;
+ }