>| is not seen often, warning could be more helpful, is understood only after reading up on the operator

[smoe]

For bugs

• Rule Id (if any, e.g. SC1000): SC2188
• My shellcheck version: 0.10.0 and online
• I tried on shellcheck.net and verified that this is still a problem on the latest commit
• It's not reproducible on shellcheck.net, but I think that's because it's an OS, configuration or encoding issue

For new checks and feature suggestions

• shellcheck.net (i.e. the latest commit) currently gives no useful warnings about this
• I searched through https://github.com/koalaman/shellcheck/issues and didn't find anything related

Here's a snippet or screenshot that shows the problem:

#!/bin/bash
halmsg="somefile"
>|$halmsg

Here's what shellcheck currently says:

Line 3	SC2188: This redirection doesn't have a command. Move to its command (or use 'true' as no-op).

Here's what I wanted or expected to see:

Is "true >| $halmsg" what you wanted to write to very explicitly empty that file and override a potential noclobber?