11882: It's not possible to enable "log to file" (debugging) in production mode. Psr logger debug method does not work by the default in developer mode.

nmalevanec · nmalevanec · commit 3e8619710a56 · 2017-11-29T11:10:48.000+02:00
diff --git a/dev/tests/functional/tests/app/Magento/Backend/Test/Constraint/AssertDeveloperSectionVisibility.php b/dev/tests/functional/tests/app/Magento/Backend/Test/Constraint/AssertDeveloperSectionVisibility.php
@@ -38,6 +38,7 @@ class AssertDeveloperSectionVisibility extends AbstractConstraint
      */
     public function processAssert(SystemConfigEdit $configEdit)
     {
+        $configEdit->open();
         if ($_ENV['mage_mode'] === 'production') {
             foreach ($this->groups as $group) {
                 \PHPUnit_Framework_Assert::assertFalse(

Original file line number	Diff line number	Diff line change
`@@ -38,6 +38,7 @@ class AssertDeveloperSectionVisibility extends AbstractConstraint`
`38`	`38`	`*/`
`39`	`39`	`public function processAssert(SystemConfigEdit $configEdit)`
`40`	`40`	`{`
	`41`	`+ $configEdit->open();`
`41`	`42`	`if ($_ENV['mage_mode'] === 'production') {`
`42`	`43`	`foreach ($this->groups as $group) {`
`43`	`44`	`\PHPUnit_Framework_Assert::assertFalse(`