From 9dcc2d83e3c3ed9c7702d7a978150b3f04854165 Mon Sep 17 00:00:00 2001
From: Tad Hardesty <tad@platymuus.com>
Date: Mon, 12 Mar 2018 23:37:05 -0700
Subject: [PATCH] Make RenderPass Sync and DMError Send

---
 src/dreammaker/error.rs        | 6 +++---
 src/tools/render_passes/mod.rs | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/dreammaker/error.rs b/src/dreammaker/error.rs
index 931f71e2..3fabfbc1 100644
--- a/src/dreammaker/error.rs
+++ b/src/dreammaker/error.rs
@@ -148,7 +148,7 @@ pub struct DMError {
     location: Location,
     severity: Severity,
     desc: String,
-    cause: Option<Box<error::Error>>,
+    cause: Option<Box<error::Error + Send>>,
 }
 
 #[allow(unused_variables)]
@@ -162,7 +162,7 @@ impl DMError {
         }
     }
 
-    pub fn set_cause<E: error::Error + 'static>(mut self, cause: E) -> DMError {
+    pub fn set_cause<E: error::Error + Send + 'static>(mut self, cause: E) -> DMError {
         self.cause = Some(Box::new(cause));
         self
     }
@@ -211,6 +211,6 @@ impl error::Error for DMError {
     }
 
     fn cause(&self) -> Option<&error::Error> {
-        self.cause.as_ref().map(|x| &**x)
+        self.cause.as_ref().map(|x| &**x as &error::Error)
     }
 }
diff --git a/src/tools/render_passes/mod.rs b/src/tools/render_passes/mod.rs
index be66fa61..ce0f7322 100644
--- a/src/tools/render_passes/mod.rs
+++ b/src/tools/render_passes/mod.rs
@@ -11,7 +11,7 @@ pub mod structures;
 /// These methods are applied to any given atom in roughly the order they
 /// appear here.
 #[allow(unused_variables)]
-pub trait RenderPass {
+pub trait RenderPass: Sync {
     /// Filter atoms based solely on their typepath.
     fn path_filter(&self,
         path: &str,