fix Issue 15913 - cannot initialize immutable fixed size array withou…

…t similar const-code

src/arrayop.d

@@ -64,7 +64,7 @@ extern (C++) FuncDeclaration buildArrayOp(Identifier ident, BinExp exp, Scope* s
 
     /* Construct the function
      */
-    auto ftype = new TypeFunction(fparams, exp.type, 0, LINKc, stc);
+    auto ftype = new TypeFunction(fparams, exp.e1.type, 0, LINKc, stc);
     //printf("fd: %s %s\n", ident.toChars(), ftype.toChars());
     //printf("fbody: %s\n", fbody.toChars());
     auto fd = new FuncDeclaration(Loc(), Loc(), ident, STCundefined, ftype);

test/runnable/arrayop.d

@@ -659,6 +659,12 @@ void test10282()
     const     int[3] a3 = a1[] * 3;         // OK <- Error
     const     int[3] a4 = [1, 3, 6] * 3;    // OK <- Error
     immutable int[3] a5 = [1, 3, 6] * 3;    // OK <- Error
+
+    assert(a1[0] == 1 && a1[1] == 3 && a1[2] == 6);
+    assert(a2[0] == 3 && a2[1] == 9 && a2[2] == 18);
+    assert(a3[0] == 3 && a3[1] == 9 && a3[2] == 18);
+    assert(a4[0] == 3 && a4[1] == 9 && a4[2] == 18);
+    assert(a5[0] == 3 && a5[1] == 9 && a5[2] == 18);
 }
 
 /************************************************************************/

test/runnable/test15913.d

@@ -0,0 +1,7 @@
+void main()//test10282()
+{
+  //const     int[3] a4 = [1, 3, 6] * 3;
+    immutable int[3] a5 = [1, 3, 6] * 3;
+
+    assert(a5[0] == 3 && a5[1] == 9 && a5[2] == 18);
+}