client: lib_docker: exec: silence noise when not debugging

client/src/docker/lib/internal/lib_docker.bash

@@ -510,9 +510,21 @@ function lib_docker::__shell()
 
 function lib_docker::__exec()
 {
+  [ -z "$DOCKER_FINANCE_DEBUG" ] && lib_utils::die_fatal
+
+  # Allocate pseudo-TTY, if needed
+  # NOTE: interactive is kept for cases in which the passed command requires it
   local _tty
   test -t 1 && _tty="t"
-  docker exec -i"$_tty" "$global_container" /bin/bash -i -c "$@"
+
+  local -r _exec=("docker" "exec" "-i$_tty" "$global_container" "/bin/bash" "-i" "-c" "$@")
+  if [ "$DOCKER_FINANCE_DEBUG" -eq 0 ]; then
+    # Silence `bash: cannot set terminal process group (-1): Inappropriate ioctl for device`
+    # NOTE: lib_utils error handling will still function as expected
+    "${_exec[@]}" 2>/dev/null
+  else
+    "${_exec[@]}"
+  fi
 }
 
 function lib_docker::__parse_args_edit()