Fixed unsound errors (#1143)

Cargo.lock

@@ -2307,9 +2307,9 @@ dependencies = [
 
 [[package]]
 name = "syntect"
-version = "4.3.0"
+version = "4.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b57a45fdcf4891bc79f635be5c559210a4cfa464891f969724944c713282eedb"
+checksum = "4e3978df05b5850c839a6b352d3c35ce0478944a4be689be826b53cf75363e88"
 dependencies = [
  "bincode",
  "bitflags",

components/errors/Cargo.toml

@@ -8,4 +8,4 @@ edition = "2018"
 tera = "1"
 toml = "0.5"
 image = "0.23"
-syntect = "4.1"
+syntect = "4.4"

components/errors/src/lib.rs

@@ -17,21 +17,18 @@ pub enum ErrorKind {
 pub struct Error {
     /// Kind of error
     pub kind: ErrorKind,
-    pub source: Option<Box<dyn StdError>>,
+    pub source: Option<Box<dyn StdError + Send + Sync>>,
 }
-unsafe impl Sync for Error {}
-unsafe impl Send for Error {}
 
 impl StdError for Error {
     fn source(&self) -> Option<&(dyn StdError + 'static)> {
-        let mut source = self.source.as_ref().map(|c| &**c);
-        if source.is_none() {
-            if let ErrorKind::Tera(ref err) = self.kind {
-                source = err.source();
-            }
+        match self.source {
+            Some(ref err) => Some(&**err),
+            None => match self.kind {
+                ErrorKind::Tera(ref err) => err.source(),
+                _ => None,
+            },
         }
-
-        source
     }
 }
 
@@ -55,7 +52,7 @@ impl Error {
     }
 
     /// Creates generic error with a cause
-    pub fn chain(value: impl ToString, source: impl Into<Box<dyn StdError>>) -> Self {
+    pub fn chain(value: impl ToString, source: impl Into<Box<dyn StdError + Send + Sync>>) -> Self {
         Self { kind: ErrorKind::Msg(value.to_string()), source: Some(source.into()) }
     }