From a6502d52edddfa1430f786e87b917543cbd8668e Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Thu, 23 Jun 1994 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1994-06-23

---
 pc/trap.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pc/trap.c b/pc/trap.c
index 4e7d7c2d2df23f9ea026822de1877f1722bdc44d..0736bd80c5b78b46709a9fc32e142031ea7837ff 100644
--- a/pc/trap.c
+++ b/pc/trap.c
@@ -445,6 +445,9 @@ syscall(Ureg *ur, void *arg)
 	if(up->scallnr == NOTED)
 		noted(ur, *(ulong*)(sp+BY2WD));
 
+	if(up->nerrlab != 0)
+		panic("nerrlab = %d syscall = %d\n", up->nerrlab, up->scallnr);
+
 	splhi(); /* avoid interrupts during the iret */
 	if(up->scallnr!=RFORK && (up->procctl || up->nnote))
 		notify(ur);