diff --git a/CHANGELOG.md b/CHANGELOG.md
index bfcd7aa1..1d13ec52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ Bug fixes
 ---------
 
 * Integer numbers that are too large to deserialize into `INT` now fall back to `Decimal` or `FLOAT` instead of silently truncating.
+* Parsing deeply-nested closures (e.g. `||{||{||{||{||{||{||{...}}}}}}}`) no longer panics but will be confined to the nesting limit.
 
 Breaking API changes
 --------------------
diff --git a/examples/event_handler_js/script.rhai b/examples/event_handler_js/script.rhai
index 0667575f..2df62003 100644
--- a/examples/event_handler_js/script.rhai
+++ b/examples/event_handler_js/script.rhai
@@ -4,7 +4,7 @@
 fn init() {
     // Can detect system-provided default states!
     // Add 'bool_state' as new state variable if one does not exist
-    if !("bool_state" in this) {
+    if "bool_state" !in this {
         this.bool_state = false;
     }
     // Add 'value' as new state variable (overwrites any existing)
diff --git a/examples/event_handler_map/script.rhai b/examples/event_handler_map/script.rhai
index 59c55f79..1dd341e3 100644
--- a/examples/event_handler_map/script.rhai
+++ b/examples/event_handler_map/script.rhai
@@ -4,7 +4,7 @@
 /// State is stored inside an object map bound to 'state'.
 fn init() {
     // Add 'bool_state' as new state variable if one does not exist
-    if !("bool_state" in state) {
+    if "bool_state" !in state {
         state.bool_state = false;
     }
     // Add 'obj_state' as new state variable (overwrites any existing)
@@ -37,7 +37,7 @@ fn start(data) {
 
 /// 'end' event handler
 fn end(data) {
-    if !state.bool_state || !("start_mode" in state) {
+    if !state.bool_state || "start_mode" !in state {
         throw "Not yet started!";
     }
     if state.value > 0 {
diff --git a/src/eval/eval_context.rs b/src/eval/eval_context.rs
index 6243d949..d0ee3b10 100644
--- a/src/eval/eval_context.rs
+++ b/src/eval/eval_context.rs
@@ -6,7 +6,7 @@ use crate::{Dynamic, Engine, Scope};
 use std::prelude::v1::*;
 
 /// Context of a script evaluation process.
-#[derive(Debug)]
+#[allow(dead_code)]
 pub struct EvalContext<'a, 's, 'ps, 'g, 'c, 't> {
     /// The current [`Engine`].
     engine: &'a Engine,
diff --git a/src/eval/stmt.rs b/src/eval/stmt.rs
index 144df5d2..d6c734b4 100644
--- a/src/eval/stmt.rs
+++ b/src/eval/stmt.rs
@@ -3,7 +3,7 @@
 use super::{Caches, EvalContext, GlobalRuntimeState, Target};
 use crate::api::events::VarDefInfo;
 use crate::ast::{
-    ASTFlags, BinaryExpr, Expr, Ident, OpAssignment, Stmt, SwitchCasesCollection, TryCatchBlock,
+    ASTFlags, BinaryExpr, Expr, OpAssignment, Stmt, SwitchCasesCollection, TryCatchBlock,
 };
 use crate::func::{get_builtin_op_assignment_fn, get_hasher};
 use crate::types::dynamic::{AccessMode, Union};
@@ -834,6 +834,7 @@ impl Engine {
             // Export statement
             #[cfg(not(feature = "no_module"))]
             Stmt::Export(x, ..) => {
+                use crate::ast::Ident;
                 let (Ident { name, pos, .. }, Ident { name: alias, .. }) = &**x;
                 // Mark scope variables as public
                 scope.search(name).map_or_else(
diff --git a/src/packages/iter_basic.rs b/src/packages/iter_basic.rs
index b7a60dd5..41dc2409 100644
--- a/src/packages/iter_basic.rs
+++ b/src/packages/iter_basic.rs
@@ -665,6 +665,7 @@ mod range_functions {
     }
     /// Return true if the range contains no items.
     #[rhai_fn(get = "is_empty", name = "is_empty", pure)]
+    #[allow(unstable_name_collisions)]
     pub fn is_empty_exclusive(range: &mut ExclusiveRange) -> bool {
         range.is_empty()
     }
diff --git a/src/types/dynamic.rs b/src/types/dynamic.rs
index a5335651..2ff6c21e 100644
--- a/src/types/dynamic.rs
+++ b/src/types/dynamic.rs
@@ -1175,6 +1175,7 @@ impl Dynamic {
     /// ```
     #[inline]
     #[must_use]
+    #[allow(unused_mut)]
     pub fn try_cast<T: Any>(mut self) -> Option<T> {
         // Coded this way in order to maximally leverage potentials for dead-code removal.