fix(shell): ceci n'est pas une pipe

On linux /dev/stdin is defined as a symlink to /proc/self/fd/0
This in turn is defined as a "magic" symlink which is allowed to point
to internal kernel objects which really does not have a file
name. As a glaring inconsistency, fopen("/proc/self/fd/0", "r")
works if fd was originally opened using pipe() but not using
socketpair(). As it happens UV_CREATE_PIPE does not create pipes
but creates socket pairs. These two unfortunate conditions
means that using /dev/stdin and similar does not work in
shell commands in nvim on linux. as a work around, override
libuv's descicion and create an actual pipe pair.

This change is not needed on BSD:s but done unconditionally for simplicity,
except for on windows where it is not done for stdout because of windows

fixes #35984

1 files changed, 1 insertions, 1 deletions

diff --git a/test/functional/testnvim.lua b/test/functional/testnvim.lua
index 7d03659f5d..75c48f36a6 100644
--- a/test/functional/testnvim.lua
+++ b/test/functional/testnvim.lua
@@ -515,7 +515,7 @@ function M.new_session(keep, ...)
       )
       io.stdout:flush()
     end
-  end)
+  end, true)
   n_processes = n_processes + 1
 
   local new_session = Session.new(proc)