[10.x] Using the native mkdir exception in LockableFile.php #49942
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Related with #49895
Once the native file creation error is available, you may discover that the directory that should exist, does not exist.
By removing the error suppression on file creation we can drill down into the error.
The directory creation where the file is hosted should return an error in case of any problems, or the file cannot be created in the next step.
By checking the error at this point you will be able to find out what is the cause of not being able to create the lock file.