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do_cleanall can produce failures when used in legitimate cases, such as with recipe variants (foo and foo-native) or a shared DL_DIR. This is why it is forbidden when writing tests that will run on the autobuilders (https://docs.yoctoproject.org/test-manual/intro.html?highlight=cleanall#considerations-when-writing-tests). Reword the documentation to clearly discourage, provide a safe alternative (bitbake -f -c fetch), and the rationale with an example. Reported-by: Sam Liddicott Link: https://bootlin.com/blog/yocto-sharing-the-sstate-cache-and-download-directories/#comment-2650335 (From yocto-docs rev: bfeb00f9213b9d2650ccf03ea666387415227be4) Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Reviewed-by: Quentin Schulz <quentin.schulz@theobroma-systems.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>