From 8c492e807961863058ed995962beb2b7c8771122 Mon Sep 17 00:00:00 2001
From: Antonio Cuni <anto.cuni@gmail.com>
Date: Tue, 9 Feb 2021 08:59:55 +0100
Subject: [PATCH] add a sanity check to ensure that we don't try to wrap the
 debug ctx twice

---
 hpy/debug/src/debug_ctx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hpy/debug/src/debug_ctx.c b/hpy/debug/src/debug_ctx.c
index aab004c64..0bb434149 100644
--- a/hpy/debug/src/debug_ctx.c
+++ b/hpy/debug/src/debug_ctx.c
@@ -41,6 +41,10 @@ static int debug_ctx_init(HPyContext dctx, HPyContext uctx)
 HPyContext hpy_debug_get_ctx(HPyContext uctx)
 {
     HPyContext dctx = &g_debug_ctx;
+    if (uctx == dctx) {
+        HPy_FatalError(uctx, "hpy_debug_get_ctx: expected an universal ctx, "
+                             "got a debug ctx");
+    }
     if (debug_ctx_init(dctx, uctx) < 0)
         return NULL;
     return dctx;