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lang-bash
file <(command)says:/dev/fd/63: broken symbolic link to pipe:[10973768]'/dev/fd/63and then pipes this into the command. The problem is, is that this file is notseekablemeaning it can only be read as a full file without random access. One of the main features of less is that it doesn't read the whole file at once, and so causes this error message.Using a text editor that reads the whole file at once will work. EtcVistdin? Isn't that not seekable as well?Programs that explicitly check the type of a file before opening it may refuse to work with process substitution, because the "file" resulting from process substitution is not a regular file.