diff --git a/src/autorouter/invoker.rs b/src/autorouter/invoker.rs
index 5331b29..0a5f6d6 100644
--- a/src/autorouter/invoker.rs
+++ b/src/autorouter/invoker.rs
@@ -253,7 +253,7 @@ impl<M: AccessMesadata> Invoker<M> {
 
     #[debug_requires(self.ongoing_command.is_none())]
     fn dispatch_command(&mut self, command: &Command) -> Result<Execute, InvokerError> {
-        match command {
+        Ok(match command {
             Command::Autoroute(selection, options) => {
                 let mut ratlines = self.autorouter.selected_ratlines(selection);
 
@@ -271,23 +271,23 @@ impl<M: AccessMesadata> Invoker<M> {
                     });
                 }
 
-                Ok::<Execute, InvokerError>(Execute::Autoroute(
+                Execute::Autoroute(
                     self.autorouter.autoroute_ratlines(ratlines, *options)?,
-                ))
+                )
             }
-            Command::PlaceVia(weight) => {
-                Ok::<Execute, InvokerError>(Execute::PlaceVia(self.autorouter.place_via(*weight)?))
-            }
-            Command::RemoveBands(selection) => Ok::<Execute, InvokerError>(Execute::RemoveBands(
+            Command::PlaceVia(weight) => Execute::PlaceVia(
+                self.autorouter.place_via(*weight)?
+            ),
+            Command::RemoveBands(selection) => Execute::RemoveBands(
                 self.autorouter.remove_bands(selection)?,
-            )),
-            Command::CompareDetours(selection, options) => Ok::<Execute, InvokerError>(
-                Execute::CompareDetours(self.autorouter.compare_detours(selection, *options)?),
             ),
-            Command::MeasureLength(selection) => Ok::<Execute, InvokerError>(
-                Execute::MeasureLength(self.autorouter.measure_length(selection)?),
+            Command::CompareDetours(selection, options) => Execute::CompareDetours(
+                self.autorouter.compare_detours(selection, *options)?,
             ),
-        }
+            Command::MeasureLength(selection) => Execute::MeasureLength(
+                self.autorouter.measure_length(selection)?,
+            ),
+        })
     }
 
     #[debug_requires(self.ongoing_command.is_none())]
@@ -308,7 +308,7 @@ impl<M: AccessMesadata> Invoker<M> {
             Command::MeasureLength(..) => {}
         }
 
-        Ok::<(), InvokerError>(self.history.undo()?)
+        Ok(self.history.undo()?)
     }
 
     //#[debug_requires(self.ongoing.is_none())]
diff --git a/src/drawing/drawing.rs b/src/drawing/drawing.rs
index ff3d8fe..8644c9d 100644
--- a/src/drawing/drawing.rs
+++ b/src/drawing/drawing.rs
@@ -432,7 +432,7 @@ impl<CW: Copy, R: AccessRules> Drawing<CW, R> {
             return Err(collision.into());
         }
 
-        Ok::<Cane, DrawingException>(cane)
+        Ok(cane)
     }
 
     #[debug_ensures(self.geometry_with_rtree.graph().node_count() == old(self.geometry_with_rtree.graph().node_count()))]
@@ -538,7 +538,7 @@ impl<CW: Copy, R: AccessRules> Drawing<CW, R> {
             maybe_rail = self.primitive(rail).outer();
         }
 
-        Ok::<(), DrawingException>(())
+        Ok(())
     }
 
     #[debug_ensures(ret.is_ok() -> self.geometry_with_rtree.graph().node_count() == old(self.geometry_with_rtree.graph().node_count() + 4))]
@@ -606,7 +606,7 @@ impl<CW: Copy, R: AccessRules> Drawing<CW, R> {
                 err
             })?;
 
-        Ok::<Cane, DrawingException>(Cane {
+        Ok(Cane {
             seg,
             dot: seg_to,
             bend,
diff --git a/src/router/draw.rs b/src/router/draw.rs
index 8e39ed0..04d3668 100644
--- a/src/router/draw.rs
+++ b/src/router/draw.rs
@@ -62,7 +62,7 @@ impl<'a, R: AccessRules> Draw<'a, R> {
         let layer = head.face().primitive(self.layout.drawing()).layer();
         let maybe_net = head.face().primitive(self.layout.drawing()).maybe_net();
 
-        Ok::<BandTermsegIndex, DrawException>(match head.face() {
+        Ok(match head.face() {
             DotIndex::Fixed(dot) => BandTermsegIndex::Straight(
                 self.layout
                     .add_lone_loose_seg(
@@ -210,7 +210,7 @@ impl<'a, R: AccessRules> Draw<'a, R> {
             },
             cw,
         )?;
-        Ok::<CaneHead, DrawingException>(CaneHead {
+        Ok(CaneHead {
             face: self
                 .layout
                 .drawing()
diff --git a/src/router/tracer.rs b/src/router/tracer.rs
index 6351a76..4cb1dbb 100644
--- a/src/router/tracer.rs
+++ b/src/router/tracer.rs
@@ -83,7 +83,7 @@ impl<'a, R: AccessRules> Tracer<'a, R> {
 
         let length = trace.path.len();
         self.undo_path(trace, length - prefix_length);
-        Ok::<(), TracerException>(self.path(navmesh, trace, &path[prefix_length..], width)?)
+        self.path(navmesh, trace, &path[prefix_length..], width)
     }
 
     #[debug_ensures(ret.is_ok() -> trace.path.len() == old(trace.path.len() + path.len()))]
diff --git a/vendored/contracts/src/implementation/codegen.rs b/vendored/contracts/src/implementation/codegen.rs
index 0e7090a..b19d578 100644
--- a/vendored/contracts/src/implementation/codegen.rs
+++ b/vendored/contracts/src/implementation/codegen.rs
@@ -345,7 +345,10 @@ pub(crate) fn generate(
                 syn::visit::visit_block(&mut try_detector, &mut block);
 
                 if try_detector.found_try {
-                    break 'blk quote::quote! { let ret: #return_type = 'run: { try { #block? } }; };
+                    break 'blk quote::quote! { let ret: #return_type = 'run: { try {
+                        let ret2: #return_type = #block;
+                        ret2?
+                    } }; };
                 } else {
                     break 'blk quote::quote! { let ret: #return_type = 'run: #block; };
                 }