Sema: Fix crash when any is followed by something that doesn't parse as a type

Author: slavapestov

lib/Parse/ParseExpr.cpp

@@ -503,6 +503,9 @@ ParserResult<Expr> Parser::parseExprSequenceElement(Diag<> message,
        peekToken().isContextualPunctuator("~")) &&
       !peekToken().isAtStartOfLine()) {
     ParserResult<TypeRepr> ty = parseType();
+    if (ty.isNull())
+      return nullptr;
+
     auto *typeExpr = new (Context) TypeExpr(ty.get());
     return makeParserResult(typeExpr);
   }

validation-test/compiler_crashers_2/fec3d092ae822aa6.swift renamed to validation-test/compiler_crashers_2_fixed/fec3d092ae822aa6.swift

@@ -1,3 +1,3 @@
 // {"signature":"swift::Parser::parseExprSequenceElement(swift::Diag<>, bool)"}
-// RUN: not --crash %target-swift-frontend -typecheck %s
+// RUN: not %target-swift-frontend -typecheck %s
 any a <