diff --git a/gcc/d/d-lang.cc b/gcc/d/d-lang.cc
index 82e24de8cd1..24a1125ef8d 100644
--- a/gcc/d/d-lang.cc
+++ b/gcc/d/d-lang.cc
@@ -306,7 +306,7 @@ d_init_options (unsigned int, cl_decoded_option *decoded_options)
   global.params.cplusplus = CppStdRevisionCpp14;
 
   /* Warnings and deprecations are disabled by default.  */
-  global.params.useDeprecated = DIAGNOSTICoff;
+  global.params.useDeprecated = DIAGNOSTICinform;
   global.params.warnings = DIAGNOSTICoff;
 
   global.params.imppath = new Strings ();
diff --git a/gcc/testsuite/gdc.dg/asm1.d b/gcc/testsuite/gdc.dg/asm1.d
index 3fcfd6a58c1..dce36769370 100644
--- a/gcc/testsuite/gdc.dg/asm1.d
+++ b/gcc/testsuite/gdc.dg/asm1.d
@@ -13,8 +13,8 @@ void parse2()
 {
     asm 
     {
-        "" : : "g" 1 ? 2 : 3;
-        "" : : "g" 1 ? 2 : : 3;
+        "" : : "g" (1 ? 2 : 3);
+        "" : : "g" (1 ? 2 : :) 3;
         // { dg-error "expression expected, not ':'" "" { target *-*-* } .-1 }
         // { dg-error "expected constant string constraint for operand" "" { target *-*-* } .-2 }
     }
@@ -58,7 +58,7 @@ void semantic1()
 void semantic2a(X...)(X expr)
 {
     alias X[0] var1;
-    asm { "%0" : "=m" var1; }   // { dg-error "double 'double' is a type, not an lvalue" }
+    asm { "%0" : "=m" (var1); } // { dg-error "double 'double' is a type, not an lvalue" }
 }
 
 void semantic2()
@@ -86,6 +86,6 @@ void semantic4()
 {
     asm
     {
-        "%0" : : "m" S4.foo;    // { dg-error "template instance opDispatch!\"foo\" has no value" }
+        "%0" : : "m" (S4.foo);  // { dg-error "template instance opDispatch!\"foo\" has no value" }
     }
 }
diff --git a/gcc/testsuite/gdc.dg/compilable.d b/gcc/testsuite/gdc.dg/compilable.d
index 92a18756a0e..3f92f9b2957 100644
--- a/gcc/testsuite/gdc.dg/compilable.d
+++ b/gcc/testsuite/gdc.dg/compilable.d
@@ -250,7 +250,7 @@ class C204 : I204
 // https://bugzilla.gdcproject.org/show_bug.cgi?id=241
 
 import imports.gdc241a;
-import imports.gdc241b : S241, C241, E241, N241;
+public import imports.gdc241b : S241, C241, E241, N241;
 
 /******************************************/
 // https://bugzilla.gdcproject.org/show_bug.cgi?id=242
diff --git a/gcc/testsuite/gdc.dg/lto/ltotests_0.d b/gcc/testsuite/gdc.dg/lto/ltotests_0.d
index bb18beaa9c8..91737609f10 100644
--- a/gcc/testsuite/gdc.dg/lto/ltotests_0.d
+++ b/gcc/testsuite/gdc.dg/lto/ltotests_0.d
@@ -46,7 +46,7 @@ struct S61b
     {
         try
             other.a();
-        catch
+        catch (Throwable)
             other.b();
     }
 }
diff --git a/gcc/testsuite/gdc.dg/runnable.d b/gcc/testsuite/gdc.dg/runnable.d
index 7307e09a645..d974bda8c58 100644
--- a/gcc/testsuite/gdc.dg/runnable.d
+++ b/gcc/testsuite/gdc.dg/runnable.d
@@ -243,7 +243,7 @@ void test36b()(char val)
 auto test36c_1()
 {
     int a;
-    void c() {};
+    void c() {}
     class Result
     {
         int b;
diff --git a/libphobos/libdruntime/MERGE b/libphobos/libdruntime/MERGE
index 5e3bf3b795a..bcde10514ec 100644
--- a/libphobos/libdruntime/MERGE
+++ b/libphobos/libdruntime/MERGE
@@ -1,4 +1,4 @@
-5cc061a8733731d5b40334c0eb7a927b6d6241ce
+d05ebaad15fbffce6d707c138c84d7b60fcf5ffd
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/druntime repository.
diff --git a/libphobos/libdruntime/rt/util/utf.d b/libphobos/libdruntime/rt/util/utf.d
index 07758409ec7..55869b37c8c 100644
--- a/libphobos/libdruntime/rt/util/utf.d
+++ b/libphobos/libdruntime/rt/util/utf.d
@@ -651,9 +651,9 @@ string toUTF8(in wchar[] s)
         else
         {
             r.length = i;
-            foreach (dchar c; s[i .. slen])
+            foreach (dchar ch; s[i .. slen])
             {
-                encode(r, c);
+                encode(r, ch);
             }
             break;
         }
diff --git a/libphobos/src/MERGE b/libphobos/src/MERGE
index 5900ca7c6a4..1562f747b74 100644
--- a/libphobos/src/MERGE
+++ b/libphobos/src/MERGE
@@ -1,4 +1,4 @@
-64ed4684fa2a0f2401f5b6df34f6dcb4c3973945
+021ae0df76727a32809a29887095ab7093489ea3
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/phobos repository.
diff --git a/libphobos/src/std/range/package.d b/libphobos/src/std/range/package.d
index fe581f3853b..13601cb9da9 100644
--- a/libphobos/src/std/range/package.d
+++ b/libphobos/src/std/range/package.d
@@ -4874,7 +4874,7 @@ if (allSatisfy!(isInputRange, Ranges))
     // Just make sure 1-range case instantiates.  This hangs the compiler
     // when no explicit stopping policy is specified due to Bug 4652.
     auto stuff = lockstep([1,2,3,4,5], StoppingPolicy.shortest);
-    foreach (int i, a; stuff)
+    foreach (i, a; stuff)
     {
         assert(stuff[i] == a);
     }
diff --git a/libphobos/testsuite/libphobos.typeinfo/struct-align.d b/libphobos/testsuite/libphobos.typeinfo/struct-align.d
index 72866517481..54eaaa6ff5a 100644
--- a/libphobos/testsuite/libphobos.typeinfo/struct-align.d
+++ b/libphobos/testsuite/libphobos.typeinfo/struct-align.d
@@ -2,7 +2,7 @@ module structalign;
 
 void main ()
 {
-    struct K { int *a; };
+    struct K { int *a; }
     K k;
     auto ti = typeid (k);