d/dmd: Merge upstream dmd d7ed327ed

Fixes ICE when accessing empty array in CTFE.

Reviewed-on: https://github.com/dlang/dmd/pull/9563

From-SVN: r270294

gcc/d/dmd/MERGE

@@ -1,4 +1,4 @@
-5dd3eccc3b0758346f77bee3cdc3f6bd15de339b
+d7ed327edb0b01ad56e7e73e77b3401cd565675e
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/dmd repository.

gcc/d/dmd/dinterpret.c

@@ -6272,11 +6272,14 @@ Expression *scrubReturnValue(Loc loc, Expression *e)
 /* Returns: true if e is void,
  * or is an array literal or struct literal of void elements.
  */
-static bool isVoid(Expression *e)
+static bool isVoid(Expression *e, bool checkArray = false)
 {
     if (e->op == TOKvoid)
         return true;
 
+    if (checkArray && e->type->ty != Tsarray)
+        return false;
+
     if (e->op == TOKarrayliteral)
         return isEntirelyVoid(((ArrayLiteralExp *)e)->elements);
 
@@ -6314,7 +6317,7 @@ Expression *scrubArray(Loc loc, Expressions *elems, bool structlit)
 
         // A struct .init may contain void members.
         // Static array members are a weird special case (bug 10994).
-        if (structlit && isVoid(e))
+        if (structlit && isVoid(e, true))
         {
             e = NULL;
         }

gcc/testsuite/gdc.test/compilable/test19778.d

@@ -0,0 +1,6 @@
+struct S
+{
+    int[] data;
+}
+immutable X = S([]);
+enum len = X.data.length;