This file is indexed.

prerm is in llvm-3.8-runtime 1:3.8-2ubuntu1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh

set -e

if test "$1" = "remove"; then
    if test -x /usr/sbin/update-binfmts; then
        update-binfmts --package llvm-3.8-runtime \
            --remove llvm-3.8-runtime.binfmt /usr/bin/lli-3.8 || true
        if test -f /var/lib/binfmts/llvm-3.8.binfmt; then
            # Purge old file
            update-binfmts --package llvm-3.8-runtime \
                --remove llvm-3.8.binfmt /usr/bin/lli-3.8 || true
        fi
    fi
fi