From c5f9eed1c045ad05e968c9a9b8fb22b1d46cd8ea Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Thu, 4 Apr 2019 21:25:47 +0200
Subject: [PATCH] Cygwin: signals:  make setcontext work from signal handlers

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
---
 winsup/cygwin/exceptions.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
index a9b378133..0aaeee52f 100644
--- a/winsup/cygwin/exceptions.cc
+++ b/winsup/cygwin/exceptions.cc
@@ -1867,6 +1867,7 @@ setcontext (const ucontext_t *ucp)
 {
   PCONTEXT ctx = (PCONTEXT) &ucp->uc_mcontext;
   _my_tls.sigmask = ucp->uc_sigmask;
+  _my_tls.incyg = true;
 #ifdef __x86_64__
   /* Apparently a call to NtContinue works on 64 bit as well, but using
      RtlRestoreContext is the blessed way. */