1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gdc.test/compilable/test11259.d b/gcc/testsuite/gdc.test/compilable/test11259.d
new file mode 100644
index 00000000000..209d5e1011a
--- /dev/null
+++ b/gcc/testsuite/gdc.test/compilable/test11259.d
@@ -0,0 +1,25 @@
+// https://issues.dlang.org/show_bug.cgi?id=11259
+
+version (Posix)
+{
+    // smallest druntime module without imports on posix
+    import core.sys.posix.libgen;
+    static assert(__traits(isSame, __traits(parent, core.sys.posix.libgen), core.sys.posix));
+    static assert(__traits(isSame, core.sys.posix, __traits(parent, core.sys.posix.libgen)));
+
+    static assert(__traits(isSame, __traits(parent, core.sys.posix), core.sys));
+    static assert(__traits(isSame, core.sys, __traits(parent, core.sys.posix)));
+}
+else
+{
+    // smallest module without imports for windows
+    import core.sys.windows.lmuseflg;
+    static assert(__traits(isSame, __traits(parent, core.sys.windows.lmuseflg), core.sys.windows));
+    static assert(__traits(isSame, core.sys.windows, __traits(parent, core.sys.windows.lmuseflg)));
+
+    static assert(__traits(isSame, __traits(parent, core.sys.windows), core.sys));
+    static assert(__traits(isSame, core.sys, __traits(parent, core.sys.windows)));
+}
+
+static assert(__traits(isSame, __traits(parent, core.sys), core));
+static assert(__traits(isSame, core, __traits(parent, core.sys)));