Fix crash in PathHandler

src/main/c/util/PathHandler.cpp

@@ -1,26 +1,26 @@
 // Copyright (c) 2013, Matt Godbolt
 // All rights reserved.
-// 
-// Redistribution and use in source and binary forms, with or without 
+//
+// Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are met:
-// 
-// Redistributions of source code must retain the above copyright notice, this 
+//
+// Redistributions of source code must retain the above copyright notice, this
 // list of conditions and the following disclaimer.
-// 
-// Redistributions in binary form must reproduce the above copyright notice, 
-// this list of conditions and the following disclaimer in the documentation 
+//
+// Redistributions in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
 // and/or other materials provided with the distribution.
-// 
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
-// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
-// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
-// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
-// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
-// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
-// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
-// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
-// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
-// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 // POSSIBILITY OF SUCH DAMAGE.
 
 #include "seasocks/util/PathHandler.h"
@@ -38,7 +38,8 @@ CrackedUriPageHandler::Ptr PathHandler::add(const CrackedUriPageHandler::Ptr& ha
 
 std::shared_ptr<Response> PathHandler::handle(
         const CrackedUri& uri, const Request& request) {
-    if (uri.path()[0] != _path) return Response::unhandled();
+    const auto &path = uri.path();
+    if (path.empty() || path[0] != _path) return Response::unhandled();
 
     auto shiftedUri = uri.shift();