File descriptor 99 is reserved for internal use
It should not, by convention, be used by any test cases; its opening here will (presumably, at least) prevent the shell from automatically allocating it for any file operations and subshells.stderr
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@ -22,6 +22,9 @@
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[ -z $__INC_EXPECT_CORE ] || return
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__INC_EXPECT_CORE=1
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# reserved for our uses
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exec 99<>/dev/null
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##
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# Shorthand for bailing out on unrecognized clauses
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