Issue #2708629 by tim.plunkett:...

Issue #2708629 by tim.plunkett: \Drupal\system\Plugin\Condition\RequestPath::evaluate() fails if the current path is '/'

core/modules/system/src/Plugin/Condition/RequestPath.php

@@ -147,7 +147,9 @@ public function evaluate() {
 
     $request = $this->requestStack->getCurrentRequest();
     // Compare the lowercase path alias (if any) and internal path.
-    $path = rtrim($this->currentPath->getPath($request), '/');
+    $path = $this->currentPath->getPath($request);
+    // Do not trim a trailing slash if that is the complete path.
+    $path = $path === '/' ? $path : rtrim($path, '/');
     $path_alias = Unicode::strtolower($this->aliasManager->getAliasByPath($path));
 
     return $this->pathMatcher->matchPath($path_alias, $pages) || (($path != $path_alias) && $this->pathMatcher->matchPath($path, $pages));

core/modules/system/src/Tests/Plugin/Condition/RequestPathTest.php

@@ -127,5 +127,14 @@ public function testConditions() {
 
     $this->assertFalse($condition->evaluate(), 'The system_path /my/pass/page4 fails for a missing path.');
 
+    // Test a path of '/'.
+    $this->aliasManager->addAlias('/', '/my/pass/page3');
+    $this->currentPath->setPath('/', $request);
+    $this->requestStack->pop();
+    $this->requestStack->push($request);
+
+    $this->assertTrue($condition->evaluate(), 'The system_path my/pass/page3 passes for wildcard paths.');
+    $this->assertEqual($condition->summary(), 'Return true on the following pages: /my/pass/*', 'The condition summary matches for a wildcard path');
+
   }
 }

core/modules/system/src/Tests/Routing/MockAliasManager.php

@@ -76,6 +76,10 @@ public function getPathByAlias($alias, $langcode = NULL) {
    * @return
    */
   public function getAliasByPath($path, $langcode = NULL) {
+    if ($path[0] !== '/') {
+      throw new \InvalidArgumentException(sprintf('Source path %s has to start with a slash.', $path));
+    }
+
     $langcode = $langcode ?: $this->defaultLanguage;
     $this->lookedUp[$path] = 1;
     return $this->aliases[$path][$langcode];