2 people reported

All time, since Jul 30.

fs.cp behavior changes with filter

“In Bun that default is honoured normally, but dropped as soon as a filter is supplied: the copy then silently leaves existing files alone.”

Is this your bug? What gets counted gets fixed. Pile on.

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I hit this bug: rapsheet.dev/sheets/bun/issues/6029/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

fs.cp copy behavior changes when filter is supplied.

Is this your bug?

Where: node:fs compatibility
Error text: error: cannot copy /tmp/tmp.VSw6l9c8MJ/dir to a subdirectory of self /tmp/tmp.VSw6l9c8MJ/dir
Versions: 1.3.14
Platforms: Linux, macOS
How bad: Breaks a normal workflow.

Original reports2, newest first

Aug 7, 2026fs.cp* with filter fail to repeatedly copy directory with symlinks#37106
Jul 30, 2026fs.cpSync ignores the default force: true when a filter is supplied (silently skips overwrites)#36494

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