[vala/0.40] libvaladoc: Don't traverse into close circles with parent

[Rico Tzschichholz <ricotz src gnome org>]

commit fedec474e2ce96c89899ff8b809e58454a61b111
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Jul 30 12:54:56 2019 +0200

    libvaladoc: Don't traverse into close circles with parent
    
    SymbolResolver.resolve_thrown_list() adds error-type nodes which are
    allowed to be NodeType.ERROR_DOMAIN and NodeType.CLASS.
    
    This can result in a cycle on invoking Node.accept_all_children(),
    Node.parse_comments() or Node.check_comments()
    
    Fixes https://gitlab.gnome.org/GNOME/vala/issues/829

 libvaladoc/api/node.vala                    | 9 +++++++++
 valadoc/tests/drivers/api-test.data.vapi    | 1 +
 valadoc/tests/drivers/generic-api-test.vala | 2 +-
 3 files changed, 11 insertions(+), 1 deletion(-)
---
diff --git a/libvaladoc/api/node.vala b/libvaladoc/api/node.vala
index edea58d7a..0ec5fda4f 100644
--- a/libvaladoc/api/node.vala
+++ b/libvaladoc/api/node.vala
@@ -118,6 +118,9 @@ public abstract class Valadoc.Api.Node : Item, Browsable, Documentation {
                do_document = true;
 
                foreach (Node node in per_name_children.get_values ()) {
+                       if (this.parent == node) {
+                               continue;
+                       }
                        if (node.is_browsable (settings)) {
                                node.parse_comments (settings, parser);
                        }
@@ -130,6 +133,9 @@ public abstract class Valadoc.Api.Node : Item, Browsable, Documentation {
        internal override void check_comments (Settings settings, DocumentationParser parser) {
 
                foreach (Node node in per_name_children.get_values ()) {
+                       if (this.parent == node) {
+                               continue;
+                       }
                        if (node.is_browsable (settings)) {
                                node.check_comments (settings, parser);
                        }
@@ -277,6 +283,9 @@ public abstract class Valadoc.Api.Node : Item, Browsable, Documentation {
         */
        public void accept_all_children (Visitor visitor, bool filtered = true) {
                foreach (Vala.List<Node> children in per_type_children.get_values ()) {
+                       if (this.parent == children[0]) {
+                               continue;
+                       }
                        foreach (Node node in children) {
                                if (node.do_document || !filtered) {
                                        node.accept (visitor);
diff --git a/valadoc/tests/drivers/api-test.data.vapi b/valadoc/tests/drivers/api-test.data.vapi
index 37871f012..c23ca2979 100644
--- a/valadoc/tests/drivers/api-test.data.vapi
+++ b/valadoc/tests/drivers/api-test.data.vapi
@@ -26,6 +26,7 @@ public errordomain TestErrDomGlobal {
        ERROR2;
 
        public static void static_method ();
+       public static void static_method_error () throws TestErrDomGlobal;
 }
 
 
diff --git a/valadoc/tests/drivers/generic-api-test.vala b/valadoc/tests/drivers/generic-api-test.vala
index 0e070e882..6448283ef 100644
--- a/valadoc/tests/drivers/generic-api-test.vala
+++ b/valadoc/tests/drivers/generic-api-test.vala
@@ -258,7 +258,7 @@ public static void test_erroromain_global (Api.ErrorDomain? err, Api.Package pkg
 
 
        Vala.List<Api.Node> methods = err.get_children_by_type (Api.NodeType.STATIC_METHOD, false);
-       assert (methods.size == 1);
+       assert (methods.size == 2);
 
        Api.Method method = methods.get (0) as Api.Method;
        assert (method != null);