From c8ab816b376c8f0675a29e8aa1237f329eed6bfb Mon Sep 17 00:00:00 2001
From: "Dirk-Jan C. Binnema" <djcb@djcbsoftware.nl>
Date: Wed, 27 Jan 2021 18:58:00 +0200
Subject: [PATCH] mu-find: don't pre/post none-message

This gives a runtime-error. Since some tools (like mu4e-alert) merge
stderr & stdout, they get confused.

Fixes: #1914.
---
 mu/mu-cmd-find.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mu/mu-cmd-find.cc b/mu/mu-cmd-find.cc
index 7b5b785d..11001785 100644
--- a/mu/mu-cmd-find.cc
+++ b/mu/mu-cmd-find.cc
@@ -442,7 +442,7 @@ output_plain (MuMsg *msg, const OutputInfo& info, const MuConfig *opts, GError *
 }
 
 
-static std::string
+G_GNUC_UNUSED static std::string
 to_string (const Mu::Sexp& sexp, bool color, size_t level = 0)
 {
         Mu::MaybeAnsi col{color};
@@ -493,9 +493,13 @@ to_string (const Mu::Sexp& sexp, bool color, size_t level = 0)
 static bool
 output_sexp (MuMsg *msg, const OutputInfo& info, const MuConfig *opts, GError **err)
 {
+        if (!msg)
+                return true;
+
         fputs(msg_to_sexp(msg, 0, {}, MU_MSG_OPTION_HEADERS_ONLY)
               .to_sexp_string().c_str(), stdout);
         fputs ("\n", stdout);
+
         return true;
 }