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UBSAN detects undefined behaviour at runtime. To avoid introduction of new UB, enable UBSAN for nolibc-test. By signalling detected errors through traps no runtime dependency is necessary. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250419-nolibc-ubsan-v2-7-060b8a016917@weissschuh.net