Drupal 8 - Notice: A non well formed numeric value encountered - Drupal Core issue for php 7.1

Question

I currently have this notice in my log messages like a million times. It seems it throws this notice every few page calls from all sorts of different pages.

This is not happening on my local or staging server, just on the live server. No idea what the cause could be or where to start looking.

How do I start debugging this? There's no file or cause listed anywhere as far as I can see?

Notice: A non well formed numeric value encountered in Drupal\Core\Menu\LocalTaskManager->getDefinitions() (line 187 of /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Menu/LocalTaskManager.php) #0 /data/sites/web/raloca/webroot/core/includes/bootstrap.inc(566): _drupal_error_handler_real(8, 'A non well form...', '/data/sites/web...', 187, Array) #1 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Menu/LocalTaskManager.php(187): _drupal_error_handler(8, 'A non well form...', '/data/sites/web...', 187, Array) #2 /data/sites/web/raloca/webroot/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryCachedTrait.php(22): Drupal\Core\Menu\LocalTaskManager->getDefinitions() #3 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php(16): Drupal\Core\Plugin\DefaultPluginManager->getDefinition('dblog.view_logs') #4 /data/sites/web/raloca/webroot/core/lib/Drupal/Component/Plugin/PluginManagerBase.php(84): Drupal\Core\Plugin\Factory\ContainerFactory->createInstance('dblog.view_logs', Array) #5 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Menu/LocalTaskManager.php(263): Drupal\Component\Plugin\PluginManagerBase->createInstance('dblog.view_logs') #6 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Menu/LocalTaskManager.php(290): Drupal\Core\Menu\LocalTaskManager->getLocalTasksForRoute('dblog.overview') #7 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Menu/LocalTaskManager.php(358): Drupal\Core\Menu\LocalTaskManager->getTasksBuild('dblog.overview', Object(Drupal\Core\Cache\CacheableMetadata)) #8 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Menu/Plugin/Block/LocalTasksBlock.php(94): Drupal\Core\Menu\LocalTaskManager->getLocalTasks('dblog.overview', 0) #9 /data/sites/web/raloca/webroot/core/modules/block/src/BlockViewBuilder.php(203): Drupal\Core\Menu\Plugin\Block\LocalTasksBlock->build() #10 [internal function]: Drupal\block\BlockViewBuilder::preRender(Array) #11 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/Renderer.php(376): call_user_func('Drupal\block\Bl...', Array) #12 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/Renderer.php(448): Drupal\Core\Render\Renderer->doRender(Array) #13 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/Renderer.php(195): Drupal\Core\Render\Renderer->doRender(Array, false) #14 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Template/TwigExtension.php(490): Drupal\Core\Render\Renderer->render(Array) #15 /data/sites/web/raloca/webroot/sites/default/files/php/twig/59d375a37438e_page.html.twig_bSBFdzJm9gjsbRg0uQYoaPOTU/jtYGppGYqxJtRfRiNI1jUxz1NwOIXrBmikWvb9-bw_Y.php(47): Drupal\Core\Template\TwigExtension->escapeFilter(Object(Drupal\Core\Template\TwigEnvironment), Array, 'html', NULL, true) #16 /data/sites/web/raloca/webroot/vendor/twig/twig/lib/Twig/Template.php(432): __TwigTemplate_f8a17f041581af9829850fd45db45c2b69d8b3a60b80408d416da5d23dbccb61->doDisplay(Array, Array) #17 /data/sites/web/raloca/webroot/vendor/twig/twig/lib/Twig/Template.php(403): Twig_Template->displayWithErrorHandling(Array, Array) #18 /data/sites/web/raloca/webroot/vendor/twig/twig/lib/Twig/Template.php(411): Twig_Template->display(Array) #19 /data/sites/web/raloca/webroot/core/themes/engines/twig/twig.engine(64): Twig_Template->render(Array) #20 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Theme/ThemeManager.php(384): twig_render_template('core/themes/sev...', Array) #21 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/Renderer.php(435): Drupal\Core\Theme\ThemeManager->render('page', Array) #22 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/Renderer.php(195): Drupal\Core\Render\Renderer->doRender(Array, false) #23 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Template/TwigExtension.php(490): Drupal\Core\Render\Renderer->render(Array) #24 /data/sites/web/raloca/webroot/sites/default/files/php/twig/59d375a37438e_html.html.twig_gQv-GORxUVif_Pag4s-5z2NkO/nkgd5xff1TOsYoTsD98V_4aosHRAMT0pEKOfQcka8TM.php(90): Drupal\Core\Template\TwigExtension->escapeFilter(Object(Drupal\Core\Template\TwigEnvironment), Array, 'html', NULL, true) #25 /data/sites/web/raloca/webroot/vendor/twig/twig/lib/Twig/Template.php(432): __TwigTemplate_be8c7bbb9c824f2826368d7c8da984c6279779db72a67fd8056a00bb23b816f2->doDisplay(Array, Array) #26 /data/sites/web/raloca/webroot/vendor/twig/twig/lib/Twig/Template.php(403): Twig_Template->displayWithErrorHandling(Array, Array) #27 /data/sites/web/raloca/webroot/vendor/twig/twig/lib/Twig/Template.php(411): Twig_Template->display(Array) #28 /data/sites/web/raloca/webroot/core/themes/engines/twig/twig.engine(64): Twig_Template->render(Array) #29 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Theme/ThemeManager.php(384): twig_render_template('core/themes/cla...', Array) #30 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/Renderer.php(435): Drupal\Core\Theme\ThemeManager->render('html', Array) #31 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/Renderer.php(195): Drupal\Core\Render\Renderer->doRender(Array, false) #32 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(147): Drupal\Core\Render\Renderer->render(Array) #33 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/Renderer.php(574): Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent{closure}() #34 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(148): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #35 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php(90): Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\CurrentRouteMatch)) #36 /data/sites/web/raloca/webroot/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object(Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent), 'kernel.view', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #37 /data/sites/web/raloca/webroot/vendor/symfony/http-kernel/HttpKernel.php(149): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.view', Object(Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent)) #38 /data/sites/web/raloca/webroot/vendor/symfony/http-kernel/HttpKernel.php(64): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #39 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #40 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #41 /data/sites/web/raloca/webroot/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #42 /data/sites/web/raloca/webroot/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #43 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #44 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(50): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #45 /data/sites/web/raloca/webroot/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #46 /data/sites/web/raloca/webroot/core/lib/Drupal/Core/DrupalKernel.php(656): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #47 /data/sites/web/raloca/webroot/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #48 {main}.

Stanislav Agapov Stanislav Agapov · Accepted Answer · 2017-10-13T05:09:19

I think your live server uses PHP 7.1, while dev/staging servers use some lower versions.

PHP 7.1 introduced Warning about invalid strings in arithmetic. And, yes, there is such "dirty" code in Drupal\Core\Menu\LocalTaskManager->getDefinitions() on line 187 ($definition['weight'] contains numeric string):

public function getDefinitions() {
  $definitions = parent::getDefinitions();
  $count = 0;
  foreach ($definitions as &$definition) {
    if (isset($definition['weight'])) {

      // Add some micro weight.
      $definition['weight'] += $count++ * 1.0E-6;
    }
  }
  return $definitions;
}

This is core thing, not your error.

Try to lower PHP version on live (say, to 7.0)?

Drupal 8 - Notice: A non well formed numeric value encountered - Drupal Core issue for php 7.1

1 Answers