Constructors cannot have calldata parameters.

Changelog.md

@@ -19,6 +19,7 @@ Bugfixes:
  * NatSpec: Do not consider ``////`` and ``/***`` as NatSpec comments.
  * Type Checker: Fix internal error related to ``using for`` applied to non-libraries.
  * Type Checker: Do not disallow assigning to calldata variables.
+ * Type Checker: Disallow constructor parameters with ``calldata`` data location.
  * Wasm backend: Fix code generation for for-loops with pre statements.
  * Yul: Fix source location of variable multi-assignment.
 

libsolidity/ast/AST.cpp

@@ -588,6 +588,15 @@ bool VariableDeclaration::isInternalCallableParameter() const
 	return false;
 }
 
+bool VariableDeclaration::isConstructorParameter() const
+{
+	if (!isCallableOrCatchParameter())
+		return false;
+	if (auto const* function = dynamic_cast<FunctionDefinition const*>(scope()))
+		return function->isConstructor();
+	return false;
+}
+
 bool VariableDeclaration::isLibraryFunctionParameter() const
 {
 	if (!isCallableOrCatchParameter())
@@ -622,7 +631,7 @@ set<VariableDeclaration::Location> VariableDeclaration::allowedDataLocations() c
 		set<Location> locations{ Location::Memory };
 		if (isInternalCallableParameter() || isLibraryFunctionParameter() || isTryCatchParameter())
 			locations.insert(Location::Storage);
-		if (!isTryCatchParameter())
+		if (!isTryCatchParameter() && !isConstructorParameter())
 			locations.insert(Location::CallData);
 
 		return locations;

libsolidity/ast/AST.h

@@ -928,6 +928,7 @@ public:
 	/// @returns true if this variable is a parameter or return parameter of an internal function
 	/// or a function type of internal visibility.
 	bool isInternalCallableParameter() const;
+	bool isConstructorParameter() const;
 	/// @returns true iff this variable is a parameter(or return parameter of a library function
 	bool isLibraryFunctionParameter() const;
 	/// @returns true if the type of the variable does not need to be specified, i.e. it is declared

test/libsolidity/syntaxTests/constructor/calldata_constructor_args.sol

@@ -0,0 +1,5 @@
+contract C {
+    constructor(uint[] calldata) public {}
+}
+// ----
+// TypeError 6651: (29-44): Data location must be "memory" for parameter in function, but "calldata" was given.