Error when Mapping type in (non-local) storage is assigned to

test/libsolidity/syntaxTests/types/mapping/assignment_local_err.sol

@@ -0,0 +1,10 @@
+contract D {
+    mapping (uint => uint) a;
+    mapping (uint => uint) b;
+    function foo() public view {
+        mapping (uint => uint) storage c = b;
+        b = c;
+    }
+}
+// ----
+// TypeError: (160-161): Mappings cannot be assigned to.

test/libsolidity/syntaxTests/types/mapping/assignment_map.sol

@@ -0,0 +1,27 @@
+contract C {
+    mapping (uint => address payable [ ]) public a = a ;
+}
+
+contract D {
+    mapping (uint => uint) a;
+    mapping (uint => uint) b = a;
+}
+
+contract F {
+    mapping (uint => uint) a;
+    mapping (uint => uint) b;
+
+    function foo() public {
+        a = b;
+    }
+}
+
+contract G {
+    uint x = 1;
+    mapping (uint => uint) b = x;
+}
+// ----
+// TypeError: (17-67): Mappings cannot be assigned to.
+// TypeError: (120-148): Mappings cannot be assigned to.
+// TypeError: (263-264): Mappings cannot be assigned to.
+// TypeError: (312-340): Mappings cannot be assigned to.

test/libsolidity/syntaxTests/types/mapping/assignment_type_mismatch.sol

@@ -0,0 +1,8 @@
+contract D {
+    mapping (uint => uint) a;
+    function foo() public view {
+        mapping (uint => int) storage c = a;
+    }
+}
+// ----
+// TypeError: (84-119): Type mapping(uint256 => uint256) is not implicitly convertible to expected type mapping(uint256 => int256).