From 03eddb5151a23799cb418021b91df31ca3565783 Mon Sep 17 00:00:00 2001
From: Benjamin Lorenz <lorenz@math.tu-berlin.de>
Date: Wed, 20 Dec 2023 14:19:16 +0100
Subject: [PATCH] gc preserve oscarnumber string

---
 src/oscarnumber.jl | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/oscarnumber.jl b/src/oscarnumber.jl
index 51502627..ab599a02 100644
--- a/src/oscarnumber.jl
+++ b/src/oscarnumber.jl
@@ -249,7 +249,10 @@ end
 
 
 function _on_to_string(e::T) where T
-   return Cstring(pointer("$e"))
+   str = "$e"
+   return GC.@preserve str begin
+      Base.unsafe_convert(Cstring, str)
+   end
 end
 @generated _on_gen_to_string(::Type{ArgT}) where ArgT =
    quote