Hardiksingh Rathore (hardiksingh-rathore) 's answer do solves my problem
i met such problem by accidentally requires libstdc++6:i386, after
install it, maybe i messed up the multilib setting.
Thanks a lot.
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package libc6-dev-i386 (not installed) failed to install/upgrade:
trying to overwrite '/usr/include/gnu', which is also in package libc6
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