From 78cb10da696fcf619d345d6ea51e1552189bfcb9 Mon Sep 17 00:00:00 2001
From: "Emil J. Tywoniak" <emil@tywoniak.eu>
Date: Wed, 26 Feb 2025 12:06:54 +0100
Subject: [PATCH] improve mkdtemp error message

---
 kernel/yosys.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/yosys.cc b/kernel/yosys.cc
index de25d20e2..0ff38e52f 100644
--- a/kernel/yosys.cc
+++ b/kernel/yosys.cc
@@ -413,8 +413,11 @@ std::string make_temp_dir(std::string template_str)
 #  endif
 
 	char *p = strdup(template_str.c_str());
+	log_assert(p);
 	char *res = mkdtemp(p);
-	log_assert(res != NULL);
+	if (!res)
+		log_error("mkdtemp failed for '%s': %s [Error %d]\n",
+			p, strerror(errno), errno);
 	template_str = p;
 	free(p);