[MacPorts] #61515: Brew zsh hangs on $(...) command substitution in Big Sur 11.0.1

[MacPorts]

#61515: Brew zsh hangs on $(...) command substitution in Big Sur 11.0.1
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 Reporter:  joelburton  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.4
 Keywords:  bigsur      |       Port:  zsh
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 tart zsh without rcs (this should start a new shell):

 /usr/local/bin/zsh --no-rcs

 try to enter the following in the new shell (it should hang):

 echo $(date)

 To me it seems like all command substitution using $() causes zsh to hang.
 Backticks seem to work though.

 (Copying report from
 https://github.com/Homebrew/discussions/discussions/141 ; this is about a
 problem with Homebrew, but I'm getting the same behavior with MacPorts0.

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Ticket URL: <https://trac.macports.org/ticket/61515>
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