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readConfigFile short-circuits when --norc is set (src/ShellCheck/Parser.hs), so an explicit --rcfile is silently not read either, without even the usual warning. Spell this out on both man page entries.
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The man page documents
--norcas not looking for.shellcheckrc/.editorconfigand--rcfileas preferring the given file over searching — but combining them (shellcheck --norc --rcfile=X) silently ignores X entirely:readConfigFileshort-circuits onignoreRCbefore the config lookup ever runs (src/ShellCheck/Parser.hs:3282-3285), so the rcfile is not read and not even the usual "unable to read --rcfile" warning fires.This documents the interaction on both entries:
--norcalso disables--rcfile, and the rcfile is not read if--norcis given.Testing: docs-only change to
shellcheck.1.md; behavior verified againstshellcheck.hs(csIgnoreRC) andsrc/ShellCheck/Parser.hs(readConfigFile).