[vala/0.40] vala: Check error-type accessibility of creation methods and delegates

[Rico Tzschichholz <ricotz src gnome org>]

commit fb7653642be12a0b98ca04c2c4d544af8855a3bd
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Jul 22 15:04:04 2020 +0200

    vala: Check error-type accessibility of creation methods and delegates

 tests/Makefile.am                                |  2 ++
 tests/semantic/creation-error-accessibility.test | 13 +++++++++++++
 tests/semantic/delegate-error-accessibility.test | 10 ++++++++++
 vala/valacreationmethod.vala                     |  7 +++++++
 vala/valadelegate.vala                           |  7 +++++++
 5 files changed, 39 insertions(+)
---
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 18a8ccfde..bacb16fa4 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -704,6 +704,8 @@ TESTS = \
        semantic/constant-value-type.test \
        semantic/constant-void.test \
        semantic/construct-without-gobject.test \
+       semantic/creation-error-accessibility.test \
+       semantic/delegate-error-accessibility.test \
        semantic/delegate-return-valist.test \
        semantic/delegate-too-few-type-arguments.test \
        semantic/delegate-too-many-type-arguments.test \
diff --git a/tests/semantic/creation-error-accessibility.test 
b/tests/semantic/creation-error-accessibility.test
new file mode 100644
index 000000000..3fde91c16
--- /dev/null
+++ b/tests/semantic/creation-error-accessibility.test
@@ -0,0 +1,13 @@
+Invalid Code
+
+errordomain FooError {
+       BAR
+}
+
+public class Foo {
+       public Foo () throws FooError {
+       }
+}
+
+void main () {
+}
diff --git a/tests/semantic/delegate-error-accessibility.test 
b/tests/semantic/delegate-error-accessibility.test
new file mode 100644
index 000000000..1bc741eee
--- /dev/null
+++ b/tests/semantic/delegate-error-accessibility.test
@@ -0,0 +1,10 @@
+Invalid Code
+
+errordomain FooError {
+       BAR
+}
+
+public delegate void Foo () throws FooError;
+
+void main () {
+}
diff --git a/vala/valacreationmethod.vala b/vala/valacreationmethod.vala
index 114bbf8c3..e917529e4 100644
--- a/vala/valacreationmethod.vala
+++ b/vala/valacreationmethod.vala
@@ -113,6 +113,13 @@ public class Vala.CreationMethod : Method {
 
                foreach (DataType error_type in get_error_types ()) {
                        error_type.check (context);
+
+                       // check whether error type is at least as accessible as the creation method
+                       if (!context.analyzer.is_type_accessible (this, error_type)) {
+                               error = true;
+                               Report.error (source_reference, "error type `%s' is less accessible than 
creation method `%s'".printf (error_type.to_string (), get_full_name ()));
+                               return false;
+                       }
                }
 
                foreach (Expression precondition in get_preconditions ()) {
diff --git a/vala/valadelegate.vala b/vala/valadelegate.vala
index cd9911d1d..9c68fd204 100644
--- a/vala/valadelegate.vala
+++ b/vala/valadelegate.vala
@@ -282,6 +282,13 @@ public class Vala.Delegate : TypeSymbol, Callable {
 
                foreach (DataType error_type in get_error_types ()) {
                        error_type.check (context);
+
+                       // check whether error type is at least as accessible as the delegate
+                       if (!context.analyzer.is_type_accessible (this, error_type)) {
+                               error = true;
+                               Report.error (source_reference, "error type `%s' is less accessible than 
delegate `%s'".printf (error_type.to_string (), get_full_name ()));
+                               return false;
+                       }
                }
 
                context.analyzer.current_source_file = old_source_file;