Do not close stderr/stdout before program finish

Programs like grep called in '$' command will fail due to SIGPIPE
for example. So we need to keep the pipe open.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/commands.cc b/src/commands.cc
index 6d6a55fc..e73b61ec 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -787,7 +787,7 @@ void define_command(const ParametersParser& parser, Context& context)
                 { "pos_in_token",      to_string(pos_in_token) }
             };
             String output = ShellManager::instance().eval(shell_cmd, context, {},
-                                                          ShellManager::Flags::ReadOutput,
+                                                          ShellManager::Flags::WaitForStdout,
                                                           params, vars).first;
             return Completions{ 0_byte, pos_in_token, split(output, '\n', 0) };
         };