1 files changed, 54 insertions, 0 deletions
diff --git a/gcc/testsuite/gdc.test/fail_compilation/test21912.d b/gcc/testsuite/gdc.test/fail_compilation/test21912.d
new file mode 100644
index 00000000000..8dde98a62b4
--- /dev/null
+++ b/gcc/testsuite/gdc.test/fail_compilation/test21912.d
@@ -0,0 +1,54 @@
+/*
+PERMUTE_ARGS: -preview=dip1000
+TEST_OUTPUT
+---
+fail_compilation/test21912.d(24): Error: function `test21912.escapeParam` is `@nogc` yet allocates closures with the GC
+fail_compilation/test21912.d(26):        test21912.escapeParam.__lambda2 closes over variable i at fail_compilation/test21912.d(24)
+fail_compilation/test21912.d(29): Error: function `test21912.escapeAssign` is `@nogc` yet allocates closures with the GC
+fail_compilation/test21912.d(31):        test21912.escapeAssign.__lambda3 closes over variable i at fail_compilation/test21912.d(29)
+fail_compilation/test21912.d(40): Error: function `test21912.escapeAssignRef` is `@nogc` yet allocates closures with the GC
+fail_compilation/test21912.d(42):        test21912.escapeAssignRef.__lambda3 closes over variable i at fail_compilation/test21912.d(40)
+fail_compilation/test21912.d(51): Error: function `test21912.escapeParamInferred` is `@nogc` yet allocates closures with the GC
+fail_compilation/test21912.d(53):        test21912.escapeParamInferred.__lambda2 closes over variable i at fail_compilation/test21912.d(51)
+---
+*/
+@nogc:
+
+alias Dg = @nogc int delegate();
+
+Dg identity(return scope Dg dg)
+{
+    return dg;
+}
+
+Dg escapeParam(int i)
+{
+    return identity(() => i);
+}
+
+Dg escapeAssign(int i, return scope Dg dg)
+{
+    dg = () => i;
+    return dg;
+}
+
+ref Dg identityR(ref return scope Dg dg)
+{
+    return dg;
+}
+
+ref Dg escapeAssignRef(int i, ref return scope Dg dg)
+{
+    dg = () => i;
+    return dg;
+}
+
+auto identityInferred(Dg dg)
+{
+    return dg;
+}
+
+Dg escapeParamInferred(int i)
+{
+    return identityInferred(() => i);
+}