[vala/0.34] codegen: Properly null-out source on ownership-transfer of delegates

[Rico Tzschichholz <ricotz src gnome org>]

commit c6f6428f10adb0b9ff037342810ccd8b86963690
Author: Marvin W <git larma de>
Date:   Tue Mar 14 18:04:07 2017 +0100

    codegen: Properly null-out source on ownership-transfer of delegates

 codegen/valaccodebasemodule.vala        |    5 +++++
 tests/Makefile.am                       |    1 +
 tests/delegates/reference_transfer.vala |   14 ++++++++++++++
 3 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index e7951c4..ae2a8e8 100644
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -5196,6 +5196,11 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
                        creation_call.add_argument (new CCodeIdentifier ("sizeof (%s)".printf (get_ccode_name 
(expr.inner.value_type))));
                        ccode.add_expression (creation_call);
                } else if (expr.value_type is DelegateType) {
+                       ccode.add_assignment (get_cvalue (expr.inner), new CCodeConstant ("NULL"));
+                       var target = get_delegate_target_cvalue (expr.inner.target_value);
+                       if (target != null) {
+                               ccode.add_assignment (target, new CCodeConstant ("NULL"));
+                       }
                        var target_destroy_notify = get_delegate_target_destroy_notify_cvalue 
(expr.inner.target_value);
                        if (target_destroy_notify != null) {
                                ccode.add_assignment (target_destroy_notify, new CCodeConstant ("NULL"));
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 769e337..3bdfffb 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -124,6 +124,7 @@ TESTS = \
        structs/bug749952.vala \
        structs/bug775761.vala \
        delegates/delegates.vala \
+       delegates/reference_transfer.vala \
        delegates/bug539166.vala \
        delegates/bug595610.vala \
        delegates/bug595639.vala \
diff --git a/tests/delegates/reference_transfer.vala b/tests/delegates/reference_transfer.vala
new file mode 100644
index 0000000..6aad6b1
--- /dev/null
+++ b/tests/delegates/reference_transfer.vala
@@ -0,0 +1,14 @@
+delegate void FooFunc ();
+
+class Foo {
+       FooFunc f;
+
+       public Foo (owned FooFunc d) {
+               f = (owned) d;
+               assert (d == null);
+       }
+}
+
+void main () {
+       var foo = new Foo (() => {});
+}