From c88b4bda88a07bf2b6b02026601ed609b1efbd25 Mon Sep 17 00:00:00 2001
From: Jean Boussier <jean.boussier@gmail.com>
Date: Tue, 30 Jan 2024 17:33:31 +0100
Subject: [PATCH] Include `errno_provenance` in sys_err messages

Helps with debugging nasty issues.
---
 ext/bootsnap/bootsnap.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ext/bootsnap/bootsnap.c b/ext/bootsnap/bootsnap.c
index 72c5b06..7526d37 100644
--- a/ext/bootsnap/bootsnap.c
+++ b/ext/bootsnap/bootsnap.c
@@ -909,6 +909,12 @@ bs_fetch(char * path, VALUE path_v, char * cache_path, VALUE handler, VALUE args
   return output_data;
 fail_errno:
   CLEANUP;
+  if (errno_provenance) {
+    exception_message = rb_str_concat(
+      rb_str_new_cstr(errno_provenance),
+      rb_str_concat(rb_str_new_cstr(": "), exception_message)
+    );
+  }
   exception = rb_syserr_new_str(errno, exception_message);
   rb_exc_raise(exception);
   __builtin_unreachable();