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libiconv VIQR: Fix a use after free.
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Authored by jhb on Sep 29 2022, 10:34 PM.
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Details

Summary

Use TAILQ_FOREACH_SAFE to walk to list of children mnemonics to free
them instead of TAILQ_FOREACH.

Reported by: GCC 12 -Wuse-after-free

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rG FreeBSD src repository
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