From 96310a4d7dff92b893b919267837cd4a221103b7 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 19 Mar 2020 13:50:01 +0100
Subject: [PATCH] nix repl: Scan NixRepl for GC roots
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Fixes #3175.

(cherry picked from commit b244e65cdbc2949af70bd539bf8f3bd2fa952d07)
Signed-off-by: Domen Kožar <domen@dev.si>
---
 src/nix/repl.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/nix/repl.cc b/src/nix/repl.cc
index f857b2e89..04bc82cc0 100644
--- a/src/nix/repl.cc
+++ b/src/nix/repl.cc
@@ -31,6 +31,9 @@ extern "C" {
 #include "command.hh"
 #include "finally.hh"
 
+#define GC_INCLUDE_NEW
+#include <gc/gc_cpp.h>
+
 namespace nix {
 
 #define ESC_RED "\033[31m"
@@ -41,7 +44,7 @@ namespace nix {
 #define ESC_CYA "\033[36m"
 #define ESC_END "\033[0m"
 
-struct NixRepl
+struct NixRepl : gc
 {
     string curDir;
     EvalState state;