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[BUG] assignments preceding 'read' persist past command in POSIX mode

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  [BUG] assignments preceding 'read' persist past command in POSIX mode Martijn Dekker <martijn@inlv.org> - 2018-05-24 23:23 +0200

#14140 — [BUG] assignments preceding 'read' persist past command in POSIX mode

In bash-20180511 and bash-20180518 snapshots and in bash 5.0.0-alpha, in 
POSIX mode, assignments preceding 'read' incorrectly persist past the 
command. 'read' is a regular builtin so they should not persist.

$ ./bash -o posix -c 'v=ok; v=bug read x </dev/null; echo "$v"'
bug

This is especially problematic because IFS assignments persist too.

Thanks,

- M.

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