[vala/0.38] girparser: Ignore conflicting closure/destroy indexes

[Rico Tzschichholz <ricotz src gnome org>]

commit c07b24626b19d0545adbd559f3cf3e0480317647
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Jan 28 23:00:03 2018 +0100

    girparser: Ignore conflicting closure/destroy indexes
    
    Reverse references from closure/destroy parameters back to the callback
    break our later logic, so skip this additional information.

 vala/valagirparser.vala |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/vala/valagirparser.vala b/vala/valagirparser.vala
index bade241..387db60 100644
--- a/vala/valagirparser.vala
+++ b/vala/valagirparser.vala
@@ -3251,13 +3251,17 @@ public class Vala.GirParser : CodeVisitor {
                                        if (instance_idx > -2 && instance_idx < closure_idx) {
                                                closure_idx--;
                                        }
-                                       current.closure_parameters.add (closure_idx);
+                                       if (current.closure_parameters.index_of (current_parameter_idx) < 0) {
+                                               current.closure_parameters.add (closure_idx);
+                                       }
                                }
                                if (destroy_idx != -1) {
                                        if (instance_idx > -2 && instance_idx < destroy_idx) {
                                                destroy_idx--;
                                        }
-                                       current.destroy_parameters.add (destroy_idx);
+                                       if (current.destroy_parameters.index_of (current_parameter_idx) < 0) {
+                                               current.destroy_parameters.add (destroy_idx);
+                                       }
                                }
                                if (param_comment != null) {
                                        if (comment == null) {