It has been unnoticed for 23 years, because IT IS NOT A BUG! It is an admittedly misconceived, FEATURE!
It is a feature that has existed since the beginning of bash it seems (the oldest tarball on ftp.gnu.org already has it), and its user interface is documented under the -f option of the export built-in.
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[ 800 ms ] story [ 705 ms ] threadIt is a feature that has existed since the beginning of bash it seems (the oldest tarball on ftp.gnu.org already has it), and its user interface is documented under the -f option of the export built-in.