[vala/0.40] vala: Init formal_target_type of ArrayCreationExpr from InitializerList

[Rico Tzschichholz <ricotz src gnome org>]

commit d0dea88aec6d10400037d52f9ec865efe2bc6b83
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Aug 16 15:17:47 2019 +0200

    vala: Init formal_target_type of ArrayCreationExpr from InitializerList
    
    formal_target_type is expected to be set when inferring generic type
    parameters.
    
    Fixes https://gitlab.gnome.org/GNOME/vala/issues/835

 tests/Makefile.am                            |  1 +
 tests/methods/argument-array-initilizer.vala | 14 ++++++++++++++
 vala/valainitializerlist.vala                |  1 +
 3 files changed, 16 insertions(+)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index fa2a152ee..37e95951a 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -132,6 +132,7 @@ TESTS = \
        methods/bug784691.vala \
        methods/bug791215.vala \
        methods/bug791283.vala \
+       methods/argument-array-initilizer.vala \
        methods/generics.vala \
        methods/printf-invalid.test \
        methods/printf-constructor.vala \
diff --git a/tests/methods/argument-array-initilizer.vala b/tests/methods/argument-array-initilizer.vala
new file mode 100644
index 000000000..3034599b7
--- /dev/null
+++ b/tests/methods/argument-array-initilizer.vala
@@ -0,0 +1,14 @@
+class Foo : Object {
+}
+
+G get_object<G> (Object[] o) {
+       return null;
+}
+
+Foo get_foo () {
+       return get_object ({ new Foo () });
+}
+
+void main() {
+       get_foo ();
+}
diff --git a/vala/valainitializerlist.vala b/vala/valainitializerlist.vala
index 0976e633a..f4f5104e9 100644
--- a/vala/valainitializerlist.vala
+++ b/vala/valainitializerlist.vala
@@ -165,6 +165,7 @@ public class Vala.InitializerList : Expression {
 
                                var array_creation = new ArrayCreationExpression 
(array_type.element_type.copy (), array_type.rank, this, source_reference);
                                array_creation.target_type = target_type;
+                               array_creation.formal_target_type = formal_target_type;
                                old_parent_node.replace_expression (this, array_creation);
 
                                checked = false;