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-rw-r--r--Doc/Zsh/mod_zftp.yo4
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/Zsh/mod_zftp.yo b/Doc/Zsh/mod_zftp.yo
index c08130bf5..395bf26de 100644
--- a/Doc/Zsh/mod_zftp.yo
+++ b/Doc/Zsh/mod_zftp.yo
@@ -439,4 +439,8 @@ until the next call to tt(zftp).  Other status changes in subshells
 will not be reflected by changes to the variables (but should
 be otherwise harmless).
 
+On some operatings systems, the control connection is not valid after a
+fork(), so that operations in subshells or on the left hand side of a
+pipeline are not possible.
+
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