From b8663f9fbc5b9355efd6b1df7d006b615b4797e8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B6nke=20Ludwig?= <sludwig@rejectedsoftware.com>
Date: Wed, 1 Feb 2017 11:05:53 +0100
Subject: [PATCH] Conditionally compile TaskFiber.state.

See https://issues.dlang.org/show_bug.cgi?id=17131
---
 source/vibe/core/task.d | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/source/vibe/core/task.d b/source/vibe/core/task.d
index b7ab8b8..b1b872d 100644
--- a/source/vibe/core/task.d
+++ b/source/vibe/core/task.d
@@ -322,11 +322,9 @@ final package class TaskFiber : Fiber {
 		return ms_globalDummyFiber;
 	}
 
-	@property State state()
-	@trusted const nothrow {
-		return super.state;
-	}
-
+	// expose Fiber.state as @safe on older DMD versions
+	static if (!__traits(compiles, () @safe { return Fiber.init.state; } ()))
+		@property State state() @trusted const nothrow { return super.state; }
 
 	private void run()
 	{