SSH: PTY allocation request failed

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+[[!meta copyright="Copyright © 2018 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!meta title="SSH: PTY allocation request failed"]]
+
+Occasionally seen when `ssh`ing to a Hurd system:
+
+    $ ssh [...]
+    PTY allocation request failed on channel 0
+    GNU laplace 0.9 GNU-Mach 1.8+git20180218-486-dbg/Hurd-0.9 i686-AT386
+    This is the GNU Hurd.  Welcome.  [...]
+    [No prompt displayed.]
+    [C-d]
+    Connection to [...] closed.
+
+That is, we failed to get a PTY allocated.
+
+We currently set up a limited number of translator nodes providing preallocated
+PTYs ([[hurd/translator/term]] translator instances), instead of dynamically
+allocating via `/dev/ptmx`, for example.
+(Which might or might not resolve this issue; there might be some resource leak
+involved?)
+
+Last seen timestamp: 2018-07 (lost exact date).