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Sat, 11 Feb 2023 09:36:12 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Bart Schaefer Date: Sat, 11 Feb 2023 09:36:01 -0800 Message-ID: Subject: Re: Frozen command substitution To: zsh-users@zsh.org Content-Type: text/plain; charset="UTF-8" X-Seq: 28914 Archived-At: X-Loop: zsh-users@zsh.org Errors-To: zsh-users-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-users-request@zsh.org X-no-archive: yes List-Id: List-Help: , List-Subscribe: , List-Unsubscribe: , List-Post: List-Owner: List-Archive: On Sat, Feb 11, 2023 at 9:03 AM Dominik Vogt wrote: > > On Sat, Feb 11, 2023 at 10:41:07AM +0100, Dominik Vogt wrote: > > foo freezes in a call of bar and won't wake up anymore when bar > > terminates: > > > R="$(bar some arguments)" <------- hangs in this line > > Apparingly this does not happen if the line is rewritten to > > > bar some arguments | read R Look for a file or pipe that's been opened in foo to which the subshell for bar might still have a descriptor (obviously other than the fd to return bar's output).