From Bugzilla Helper: User-Agent: Mozilla/4.77 [en] (X11; U; Linux 2.2.17-14 i686) Description of problem: command substitution (using eval or ``) may fail with "Can't reopen pipe to command substitution", due to a race between a call to fdopen() and the SIGCHLD signal handler Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: Do this in a bash shell while :; do x=`echo abc`; if [ "$x" != abc ] ; then echo oops ; fi ;done and then wait ... Actual Results: After a while you'll get an oops ... Expected Results: No oops'es Additional info: See bug 8266 This bug only mentions RedHat Linux 6.0, but the bug still exists in the bash that comes with RedHat Linux 6.2, which means that, since 6.2 is the last of the 6.x series, the bug should be fixed. It cannot be ignored on the grounds that 6.0 is no longer a supported version of RedHat Linux. RHL 6.2 is.
Since this is not a security bug, there's no immediate need for an errata. The solution is to use bash 2.x (which is included in 6.2, as well, and is the only bash in more current releases).