when patterns are only supplied with -e, a filename is treated as the implicit pattern

[barneyb]

Passing -e mishandles a filename, if present, treating it as the pattern. lgrep -e Cli src/*.rs and lgrep Cli src/*.rs should be equivalent, but lgrep considers the first (globbed) filename to be a pattern. If a single filename is specified (or the glob only matches one) like lgrep -e Cli src/lib.rs, the filename is considered a pattern, and waits to filter STDIN.