codegen: Let methods return -1 on error by default if possible

Fixes https://gitlab.gnome.org/GNOME/vala/issues/526

1 files changed, 18 insertions, 0 deletions

diff --git a/tests/errors/bug762377.vala b/tests/errors/bug762377.vala
new file mode 100644
index 000000000..f5b2fb959
--- /dev/null
+++ b/tests/errors/bug762377.vala
@@ -0,0 +1,18 @@
+class FooOutputStream : GLib.OutputStream {
+	public override ssize_t write (uint8[] buffer, Cancellable? cancellable = null) throws IOError {
+		throw new IOError.FAILED ("");
+	}
+
+	public override bool close (Cancellable? cancellable = null) throws IOError {
+		return true;
+	}
+}
+
+void main () {
+	try {
+		var output = new FooOutputStream ();
+		size_t bytes_written;
+		output.write_all ("Hello world!".data, out bytes_written);
+	} catch (IOError e) {
+	}
+}