diff --git a/gcc/d/dmd/expressionsem.d b/gcc/d/dmd/expressionsem.d
index 515de3447..88ae28707 100644
--- a/gcc/d/dmd/expressionsem.d
+++ b/gcc/d/dmd/expressionsem.d
@@ -8923,7 +8923,7 @@ private extern (C++) final class ExpressionSemanticVisitor : Visitor
                 TypeAArray ta = cast(TypeAArray)t2b;
 
                 // Special handling for array keys
-                if (!arrayTypeCompatible(exp.e1.loc, exp.e1.type, ta.index))
+                if (!arrayTypeCompatibleWithoutCasting(exp.e1.type, ta.index))
                 {
                     // Convert key to type of key
                     exp.e1 = exp.e1.implicitCastTo(sc, ta.index);
diff --git a/gcc/d/dmd/traits.d b/gcc/d/dmd/traits.d
index 574645d89..1b5c51fb2 100644
--- a/gcc/d/dmd/traits.d
+++ b/gcc/d/dmd/traits.d
@@ -1010,7 +1010,7 @@ extern (C++) Expression semanticTraits(TraitsExp e, Scope* sc)
             // If the symbol passed as a parameter is an
             // interface that inherits other interfaces
             overloadApply(f, &dg);
-            if (ifd && ifd.interfaces)
+            if (ifd && ifd.interfaces && f)
             {
                 // check the overloads of each inherited interface individually
                 foreach (bc; ifd.interfaces)
diff --git a/gcc/d/verstr.h b/gcc/d/verstr.h
index 6da741fd8..ddba1dfc7 100644
--- a/gcc/d/verstr.h
+++ b/gcc/d/verstr.h
@@ -1 +1 @@
-"2.081.1"
+"2.081.2"
diff --git a/gcc/testsuite/gdc.test/fail_compilation/fail19076.d b/gcc/testsuite/gdc.test/fail_compilation/fail19076.d
new file mode 100644
index 000000000..9bfc0a564
--- /dev/null
+++ b/gcc/testsuite/gdc.test/fail_compilation/fail19076.d
@@ -0,0 +1,11 @@
+/*
+TEST_OUTPUT:
+---
+fail_compilation/fail19076.d(11): Error: no property `V` for type `fail19076.I`
+fail_compilation/fail19076.d(11): Error: `(I).V` cannot be resolved
+---
+*/
+
+interface P { }
+interface I : P { }
+auto F = __traits(getVirtualFunctions, I, "V");
diff --git a/gcc/testsuite/gdc.test/fail_compilation/test19112.d b/gcc/testsuite/gdc.test/fail_compilation/test19112.d
new file mode 100644
index 000000000..f5bd4035e
--- /dev/null
+++ b/gcc/testsuite/gdc.test/fail_compilation/test19112.d
@@ -0,0 +1,16 @@
+/* TEST_OUTPUT:
+---
+fail_compilation/test19112.d(13): Error: cannot implicitly convert expression `[123, 456]` of type `int[]` to `int[1]`
+fail_compilation/test19112.d(15): Error: cannot implicitly convert expression `a` of type `int[]` to `int[1]`
+---
+*/
+
+// https://issues.dlang.org/show_bug.cgi?id=19112
+
+void main()
+{
+    int[int[1]] aa;
+    int* p = [123, 456] in aa;
+    int[] a;
+    p = a in aa;
+}
diff --git a/libphobos/configure b/libphobos/configure
index 05d7e828c..3fa94c362 100755
--- a/libphobos/configure
+++ b/libphobos/configure
@@ -14557,8 +14557,8 @@ SPEC_PHOBOS_DEPS="$LIBS"
 
 
 # Libdruntime / phobos soname version
-DRUNTIME_SOVERSION="76:2:0"
-PHOBOS_SOVERSION="76:2:0"
+DRUNTIME_SOVERSION="81:2:0"
+PHOBOS_SOVERSION="81:2:0"
 
 
 
diff --git a/libphobos/configure.ac b/libphobos/configure.ac
index 70fccec36..55241d8bf 100644
--- a/libphobos/configure.ac
+++ b/libphobos/configure.ac
@@ -148,8 +148,8 @@ SPEC_PHOBOS_DEPS="$LIBS"
 AC_SUBST(SPEC_PHOBOS_DEPS)
 
 # Libdruntime / phobos soname version
-DRUNTIME_SOVERSION="76:2:0"
-PHOBOS_SOVERSION="76:2:0"
+DRUNTIME_SOVERSION="81:2:0"
+PHOBOS_SOVERSION="81:2:0"
 AC_SUBST([DRUNTIME_SOVERSION])
 AC_SUBST([PHOBOS_SOVERSION])
 
diff --git a/libphobos/libdruntime/core/memory.d b/libphobos/libdruntime/core/memory.d
index a5c42de76..4e3ee5aff 100644
--- a/libphobos/libdruntime/core/memory.d
+++ b/libphobos/libdruntime/core/memory.d
@@ -1019,7 +1019,7 @@ void __delete(T)(ref T x) @system
     }
     else static if (is(T : E2[], E2))
     {
-        GC.free(x.ptr);
+        GC.free(cast(void*) x.ptr);
         x = null;
     }
 }
@@ -1167,3 +1167,21 @@ unittest
     int* pint; __delete(pint);
     S* ps; __delete(ps);
 }
+
+// https://issues.dlang.org/show_bug.cgi?id=19092
+unittest
+{
+    const(int)[] x = [1, 2, 3];
+    assert(GC.addrOf(x.ptr) != null);
+    __delete(x);
+    assert(x is null);
+    assert(GC.addrOf(x.ptr) == null);
+
+    immutable(int)[] y = [1, 2, 3];
+    assert(GC.addrOf(y.ptr) != null);
+    __delete(y);
+    assert(y is null);
+    assert(GC.addrOf(y.ptr) == null);
+}
+
+
diff --git a/libphobos/src/std/conv.d b/libphobos/src/std/conv.d
index 81eb168f6..ad4b80f73 100644
--- a/libphobos/src/std/conv.d
+++ b/libphobos/src/std/conv.d
@@ -2737,7 +2737,6 @@ Target parse(Target, Source)(ref Source source)
 if (isInputRange!Source && isSomeChar!(ElementType!Source) && !is(Source == enum) &&
     isFloatingPoint!Target && !is(Target == enum))
 {
-    import core.stdc.math : HUGE_VAL;
     import std.ascii : isDigit, isAlpha, toLower, toUpper, isHexDigit;
     import std.exception : enforce;
 
@@ -3240,7 +3239,7 @@ if (isInputRange!Source && isSomeChar!(ElementType!Source) && !is(Source == enum
         }
     }
   L6: // if overflow occurred
-    enforce(ldval != HUGE_VAL, new ConvException("Range error"));
+    enforce(ldval != real.infinity, new ConvException("Range error"));
 
   L1:
     static if (isNarrowString!Source)
diff --git a/libphobos/src/std/random.d b/libphobos/src/std/random.d
index 7e63fb823..e56579065 100644
--- a/libphobos/src/std/random.d
+++ b/libphobos/src/std/random.d
@@ -2182,8 +2182,7 @@ do
         immutable T u = (rng.front - rng.min) * factor;
         rng.popFront();
 
-        import core.stdc.limits : CHAR_BIT;  // CHAR_BIT is always 8
-        static if (isIntegral!R && T.mant_dig >= (CHAR_BIT * R.sizeof))
+        static if (isIntegral!R && T.mant_dig >= (8 * R.sizeof))
         {
             /* If RNG variates are integral and T has enough precision to hold
              * R without loss, we're guaranteed by the definition of factor
diff --git a/libphobos/src/std/range/package.d b/libphobos/src/std/range/package.d
index 4701bab97..a3981ae90 100644
--- a/libphobos/src/std/range/package.d
+++ b/libphobos/src/std/range/package.d
@@ -8587,13 +8587,11 @@ public:
             *      gap: (7 - 4) % 2 = 3 % 2 = 1
             *      end: 7 - 1 = 6
             */
-            pragma(inline, true);
             return (source.length - windowSize)  % stepSize;
         }
 
         private size_t numberOfFullFrames()
         {
-            pragma(inline, true);
             /**
             5.iota.slides(2, 1) => [0, 1], [1, 2], [2, 3], [3, 4]       (4)
             7.iota.slides(2, 2) => [0, 1], [2, 3], [4, 5], [6]          (3)
@@ -8610,7 +8608,6 @@ public:
         // Whether the last slide frame size is less than windowSize
         private bool hasPartialElements()
         {
-            pragma(inline, true);
             static if (withPartial)
                 return gap != 0 && source.length > numberOfFullFrames * stepSize;
             else
@@ -9387,6 +9384,14 @@ public:
     }}
 }
 
+// https://issues.dlang.org/show_bug.cgi?id=19082
+@safe unittest
+{
+    import std.algorithm.comparison : equal;
+    import std.algorithm.iteration : map;
+    assert([1].map!(x => x).slide(2).equal!equal([[1]]));
+}
+
 private struct OnlyResult(T, size_t arity)
 {
     private this(Values...)(auto ref Values values)