re PR d/88958 (ICE in walk_aliased_vdefs_1, at tree-ssa-alias.c:2887)

    PR d/88958
d/dmd: Merge upstream dmd 0fc786f49

Backport fix to disallow passing functions as parameters.

Fixes https://gcc.gnu.org/PR88958

Reviewed-on: https://github.com/dlang/dmd/pull/9437

From-SVN: r269557

gcc/d/dmd/MERGE

-d517c0e6a10b548f44d82b71b3c079663cb94f8e
+0fc786f4908aa6bdd4220af87995333b1f24c3d7
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/dmd repository.

gcc/d/dmd/expressionsem.c

@@ -102,6 +102,12 @@ static bool preFunctionParameters(Scope *sc, Expressions *exps)
                 arg = new ErrorExp();
                 err = true;
             }
+            else if (arg->type->toBasetype()->ty == Tfunction)
+            {
+                arg->error("cannot pass type %s as a function argument", arg->toChars());
+                arg = new ErrorExp();
+                err = true;
+            }
             else if (checkNonAssignmentArrayOp(arg))
             {
                 arg = new ErrorExp();

gcc/testsuite/gdc.test/fail_compilation/test19608.d

+// https://issues.dlang.org/show_bug.cgi?id=19608
+/*
+TEST_OUTPUT:
+---
+fail_compilation/test19608.d(15): Error: cannot pass function `*& f` as a function argument
+---
+*/
+import core.stdc.stdarg;
+
+void f(int) {}
+void g(...) {}
+void h()
+{
+    g(&f);  // OK, function address
+    g(*&f); // ICE -> Error
+}