[vala/staging] vala: params-array parameter is not allowed in abstract/virtual method

[Rico Tzschichholz <ricotz src gnome org>]

commit c75950de668f08fbf9ca15262534b9ed387b0ca3
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue May 5 12:28:32 2020 +0200

    vala: params-array parameter is not allowed in abstract/virtual method
    
    Fixes https://gitlab.gnome.org/GNOME/vala/issues/985

 tests/Makefile.am                        | 1 +
 tests/methods/params-array-abstract.test | 8 ++++++++
 vala/valamethod.vala                     | 4 ++--
 3 files changed, 11 insertions(+), 2 deletions(-)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index af8fe4d74..b30704f86 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -176,6 +176,7 @@ TESTS = \
        methods/delegate-target.vala \
        methods/generics.vala \
        methods/params-array.vala \
+       methods/params-array-abstract.test \
        methods/print-attribute.vala \
        methods/print-attribute-invalid.test \
        methods/printf-invalid.test \
diff --git a/tests/methods/params-array-abstract.test b/tests/methods/params-array-abstract.test
new file mode 100644
index 000000000..29a02d276
--- /dev/null
+++ b/tests/methods/params-array-abstract.test
@@ -0,0 +1,8 @@
+Invalid Code
+
+abstract class Foo {
+    public abstract void bar (params int[] a);
+}
+
+void main () {
+}
diff --git a/vala/valamethod.vala b/vala/valamethod.vala
index 35e0cc810..e617f9d61 100644
--- a/vala/valamethod.vala
+++ b/vala/valamethod.vala
@@ -248,7 +248,7 @@ public class Vala.Method : Subroutine, Callable {
 
        public bool is_variadic () {
                foreach (Parameter param in parameters) {
-                       if (param.ellipsis) {
+                       if (param.ellipsis || param.params_array) {
                                return true;
                        }
                }
@@ -728,7 +728,7 @@ public class Vala.Method : Subroutine, Callable {
 
                if (is_variadic () && (is_abstract || is_virtual)) {
                        error = true;
-                       Report.error (source_reference, "Abstract and virtual methods may not be variadic. 
Use a `va_list' parameter instead of `...'.");
+                       Report.error (source_reference, "Abstract and virtual methods may not be variadic. 
Use a `va_list' parameter instead of `...' or params-array.");
                        return false;
                }