[d] Committed merge upstream dmd d1a606599

diff --git a/gcc/d/dmd/MERGE b/gcc/d/dmd/MERGE
index 6cbc4e37819..a421448a287 100644
--- a/gcc/d/dmd/MERGE
+++ b/gcc/d/dmd/MERGE
@@ -1,4 +1,4 @@ 
-b061bd744cb4eb94a7118581387d988d4ec25e97
+d1a606599e7c2bea8fda8bf5e3ddceb486ae69ac
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/dmd repository.
diff --git a/gcc/d/dmd/dclass.c b/gcc/d/dmd/dclass.c
index bbe2f8a9d72..4609d6a9f54 100644
--- a/gcc/d/dmd/dclass.c
+++ b/gcc/d/dmd/dclass.c
@@ -395,7 +395,6 @@  void ClassDeclaration::semantic(Scope *sc)
     }
     else if (symtab && !scx)
     {
-        semanticRun = PASSsemanticdone;
         return;
     }
     semanticRun = PASSsemantic;
diff --git a/gcc/d/dmd/expressionsem.c b/gcc/d/dmd/expressionsem.c
index 781bd3ea5fd..fed36cf9242 100644
--- a/gcc/d/dmd/expressionsem.c
+++ b/gcc/d/dmd/expressionsem.c
@@ -2370,6 +2370,7 @@  public:
             return setError();
         }
 
+        sc->_module->contentImportedFiles.push(name);
         if (global.params.verbose)
             message("file      %.*s\t(%s)", (int)se->len, (char *)se->string, name);
         if (global.params.moduleDeps != NULL)
diff --git a/gcc/d/dmd/module.h b/gcc/d/dmd/module.h
index 4a20356db89..f4253d32657 100644
--- a/gcc/d/dmd/module.h
+++ b/gcc/d/dmd/module.h
@@ -76,6 +76,7 @@  public:
     unsigned numlines;  // number of lines in source file
     int isDocFile;      // if it is a documentation input file, not D source
     bool isPackageFile; // if it is a package.d
+    Strings contentImportedFiles;  // array of files whose content was imported
     int needmoduleinfo;
 
     int selfimports;            // 0: don't know, 1: does not, 2: does
diff --git a/gcc/testsuite/gdc.test/compilable/imports/pr9471a.d b/gcc/testsuite/gdc.test/compilable/imports/pr9471a.d
new file mode 100644
index 00000000000..79b78e1e52a
--- /dev/null
+++ b/gcc/testsuite/gdc.test/compilable/imports/pr9471a.d
@@ -0,0 +1,2 @@ 
+import imports.pr9471c;
+class AggregateDeclaration : ScopeDsymbol { }
diff --git a/gcc/testsuite/gdc.test/compilable/imports/pr9471b.d b/gcc/testsuite/gdc.test/compilable/imports/pr9471b.d
new file mode 100644
index 00000000000..a46a12c496f
--- /dev/null
+++ b/gcc/testsuite/gdc.test/compilable/imports/pr9471b.d
@@ -0,0 +1,5 @@ 
+import imports.pr9471a;
+class ClassDeclaration : AggregateDeclaration
+{
+    void isBaseOf();
+}
diff --git a/gcc/testsuite/gdc.test/compilable/imports/pr9471c.d b/gcc/testsuite/gdc.test/compilable/imports/pr9471c.d
new file mode 100644
index 00000000000..d80a61480ce
--- /dev/null
+++ b/gcc/testsuite/gdc.test/compilable/imports/pr9471c.d
@@ -0,0 +1,18 @@ 
+import imports.pr9471b;
+
+struct Array(T)
+{
+    static if (is(typeof(T.opCmp))) { }
+}
+alias ClassDeclarations = Array!ClassDeclaration;
+
+class Dsymbol
+{
+    void addObjcSymbols(ClassDeclarations);
+}
+
+class ScopeDsymbol : Dsymbol
+{
+    import imports.pr9471d;
+    void importScope();
+}
diff --git a/gcc/testsuite/gdc.test/compilable/imports/pr9471d.d b/gcc/testsuite/gdc.test/compilable/imports/pr9471d.d
new file mode 100644
index 00000000000..187b9083294
--- /dev/null
+++ b/gcc/testsuite/gdc.test/compilable/imports/pr9471d.d
@@ -0,0 +1 @@ 
+// Module needs to be imported to trigger bug.
diff --git a/gcc/testsuite/gdc.test/compilable/pr9471.d b/gcc/testsuite/gdc.test/compilable/pr9471.d
new file mode 100644
index 00000000000..37ff32e4957
--- /dev/null
+++ b/gcc/testsuite/gdc.test/compilable/pr9471.d
@@ -0,0 +1,6 @@ 
+// PERMUTE_ARGS:
+// EXTRA_FILES: imports/pr9471a.d imports/pr9471b.d imports/pr9471c.d imports/pr9471d.d
+import imports.pr9471a;
+import imports.pr9471b;
+
+static assert (__traits(getVirtualIndex, ClassDeclaration.isBaseOf) == 7);
diff --git a/gcc/testsuite/gdc.test/runnable/traits.d b/gcc/testsuite/gdc.test/runnable/traits.d
index 6c3bf7859e3..b73ee01ce42 100644
--- a/gcc/testsuite/gdc.test/runnable/traits.d
+++ b/gcc/testsuite/gdc.test/runnable/traits.d
@@ -1253,7 +1253,7 @@  struct S10096X
     this(this) {}
     ~this() {}
 
-    string getStr() in(str) out(r; r == str) { return str; }
+    string getStr() in { assert(str); } out(r) { assert(r == str); } body { return str; }
 }
 static assert(
     [__traits(allMembers, S10096X)] ==
@@ -1271,7 +1271,7 @@  class C10096X
     this(int) {}
     ~this() {}
 
-    string getStr() in(str) out(r; r == str) { return str;
+    string getStr() in { assert(str); } out(r) { assert(r == str); } body { return str; }
 }
 static assert(
     [__traits(allMembers, C10096X)] ==