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fix for a trap on SIGINT restoring the default disposition in an asynchronous subshell; change cd exit status if -Pe supplied and the directory can't be changed; fix for compound associative array assignment if one of the expanded words unsets the array during word expansion; fixes for rare systems that don't have various defines and system calls
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@@ -3309,6 +3309,9 @@ using the compound assignment syntax; see
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.B PARAMETERS
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above.
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.PP
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If one of the word expansions in a compound array assignment unsets the
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variable, the results are unspecified.
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.PP
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An array element is referenced using
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${\fIname\fP[\fIsubscript\fP]}.
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The braces are required to avoid conflicts with pathname expansion.
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