diff --git a/egui/src/context.rs b/egui/src/context.rs
index fdcf63bdccf..deeb16fba76 100644
--- a/egui/src/context.rs
+++ b/egui/src/context.rs
@@ -58,7 +58,7 @@ impl std::ops::Deref for CtxRef {
     type Target = Context;
 
     fn deref(&self) -> &Context {
-        self.0.deref()
+        &*self.0
     }
 }
 
diff --git a/egui/src/lib.rs b/egui/src/lib.rs
index 612b60fc3a8..55f57050c63 100644
--- a/egui/src/lib.rs
+++ b/egui/src/lib.rs
@@ -252,23 +252,31 @@
 #![warn(
     clippy::all,
     clippy::await_holding_lock,
+    clippy::char_lit_as_u8,
+    clippy::checked_conversions,
     clippy::dbg_macro,
     clippy::debug_assert_with_mut_call,
     clippy::doc_markdown,
     clippy::empty_enum,
     clippy::enum_glob_use,
     clippy::exit,
+    clippy::expl_impl_clone_on_copy,
+    clippy::explicit_deref_methods,
     clippy::explicit_into_iter_loop,
+    clippy::fallible_impl_from,
     clippy::filter_map_next,
+    clippy::float_cmp_const,
     clippy::fn_params_excessive_bools,
     clippy::if_let_mutex,
     clippy::imprecise_flops,
     clippy::inefficient_to_string,
+    clippy::invalid_upcast_comparisons,
     clippy::large_types_passed_by_value,
     clippy::let_unit_value,
     clippy::linkedlist,
     clippy::lossy_float_literal,
     clippy::macro_use_imports,
+    clippy::manual_ok_or,
     clippy::map_err_ignore,
     clippy::map_flatten,
     clippy::match_on_vec_items,
@@ -278,21 +286,31 @@
     clippy::mismatched_target_os,
     clippy::missing_errors_doc,
     clippy::missing_safety_doc,
+    clippy::mut_mut,
+    clippy::mutex_integer,
     clippy::needless_borrow,
     clippy::needless_continue,
     clippy::needless_pass_by_value,
     clippy::option_option,
+    clippy::path_buf_push_overwrite,
+    clippy::ptr_as_ptr,
     clippy::pub_enum_variant_names,
     clippy::ref_option_ref,
     clippy::rest_pat_in_fully_bound_structs,
+    clippy::same_functions_in_if_condition,
     clippy::string_add_assign,
     clippy::string_add,
+    clippy::string_lit_as_bytes,
     clippy::string_to_string,
     clippy::todo,
+    clippy::trait_duplication_in_bounds,
     clippy::unimplemented,
     clippy::unnested_or_patterns,
     clippy::unused_self,
+    clippy::useless_transmute,
     clippy::verbose_file_reads,
+    clippy::wrong_pub_self_convention,
+    clippy::zero_sized_map_values,
     future_incompatible,
     nonstandard_style,
     rust_2018_idioms
diff --git a/egui_demo_lib/src/lib.rs b/egui_demo_lib/src/lib.rs
index 2571285ce97..a9884452ce2 100644
--- a/egui_demo_lib/src/lib.rs
+++ b/egui_demo_lib/src/lib.rs
@@ -13,23 +13,31 @@
 #![warn(
     clippy::all,
     clippy::await_holding_lock,
+    clippy::char_lit_as_u8,
+    clippy::checked_conversions,
     clippy::dbg_macro,
     clippy::debug_assert_with_mut_call,
     clippy::doc_markdown,
     clippy::empty_enum,
     clippy::enum_glob_use,
     clippy::exit,
+    clippy::expl_impl_clone_on_copy,
+    clippy::explicit_deref_methods,
     clippy::explicit_into_iter_loop,
+    clippy::fallible_impl_from,
     clippy::filter_map_next,
+    clippy::float_cmp_const,
     clippy::fn_params_excessive_bools,
     clippy::if_let_mutex,
     clippy::imprecise_flops,
     clippy::inefficient_to_string,
+    clippy::invalid_upcast_comparisons,
     clippy::large_types_passed_by_value,
     clippy::let_unit_value,
     clippy::linkedlist,
     clippy::lossy_float_literal,
     clippy::macro_use_imports,
+    clippy::manual_ok_or,
     clippy::map_err_ignore,
     clippy::map_flatten,
     clippy::match_on_vec_items,
@@ -39,21 +47,31 @@
     clippy::mismatched_target_os,
     clippy::missing_errors_doc,
     clippy::missing_safety_doc,
+    clippy::mut_mut,
+    clippy::mutex_integer,
     clippy::needless_borrow,
     clippy::needless_continue,
     clippy::needless_pass_by_value,
     clippy::option_option,
+    clippy::path_buf_push_overwrite,
+    clippy::ptr_as_ptr,
     clippy::pub_enum_variant_names,
     clippy::ref_option_ref,
     clippy::rest_pat_in_fully_bound_structs,
+    clippy::same_functions_in_if_condition,
     clippy::string_add_assign,
     clippy::string_add,
+    clippy::string_lit_as_bytes,
     clippy::string_to_string,
     clippy::todo,
+    clippy::trait_duplication_in_bounds,
     clippy::unimplemented,
     clippy::unnested_or_patterns,
     clippy::unused_self,
+    clippy::useless_transmute,
     clippy::verbose_file_reads,
+    clippy::wrong_pub_self_convention,
+    clippy::zero_sized_map_values,
     future_incompatible,
     nonstandard_style,
     rust_2018_idioms
diff --git a/emath/src/lib.rs b/emath/src/lib.rs
index 496daaa08ac..683c238a65d 100644
--- a/emath/src/lib.rs
+++ b/emath/src/lib.rs
@@ -20,23 +20,31 @@
 #![warn(
     clippy::all,
     clippy::await_holding_lock,
+    clippy::char_lit_as_u8,
+    clippy::checked_conversions,
     clippy::dbg_macro,
     clippy::debug_assert_with_mut_call,
     clippy::doc_markdown,
     clippy::empty_enum,
     clippy::enum_glob_use,
     clippy::exit,
+    clippy::expl_impl_clone_on_copy,
+    clippy::explicit_deref_methods,
     clippy::explicit_into_iter_loop,
+    clippy::fallible_impl_from,
     clippy::filter_map_next,
+    clippy::float_cmp_const,
     clippy::fn_params_excessive_bools,
     clippy::if_let_mutex,
     clippy::imprecise_flops,
     clippy::inefficient_to_string,
+    clippy::invalid_upcast_comparisons,
     clippy::large_types_passed_by_value,
     clippy::let_unit_value,
     clippy::linkedlist,
     clippy::lossy_float_literal,
     clippy::macro_use_imports,
+    clippy::manual_ok_or,
     clippy::map_err_ignore,
     clippy::map_flatten,
     clippy::match_on_vec_items,
@@ -46,21 +54,31 @@
     clippy::mismatched_target_os,
     clippy::missing_errors_doc,
     clippy::missing_safety_doc,
+    clippy::mut_mut,
+    clippy::mutex_integer,
     clippy::needless_borrow,
     clippy::needless_continue,
     clippy::needless_pass_by_value,
     clippy::option_option,
+    clippy::path_buf_push_overwrite,
+    clippy::ptr_as_ptr,
     clippy::pub_enum_variant_names,
     clippy::ref_option_ref,
     clippy::rest_pat_in_fully_bound_structs,
+    clippy::same_functions_in_if_condition,
     clippy::string_add_assign,
     clippy::string_add,
+    clippy::string_lit_as_bytes,
     clippy::string_to_string,
     clippy::todo,
+    clippy::trait_duplication_in_bounds,
     clippy::unimplemented,
     clippy::unnested_or_patterns,
     clippy::unused_self,
+    clippy::useless_transmute,
     clippy::verbose_file_reads,
+    clippy::wrong_pub_self_convention,
+    clippy::zero_sized_map_values,
     future_incompatible,
     nonstandard_style,
     rust_2018_idioms
diff --git a/epaint/src/lib.rs b/epaint/src/lib.rs
index c2156c87710..5d80b8fad92 100644
--- a/epaint/src/lib.rs
+++ b/epaint/src/lib.rs
@@ -11,23 +11,31 @@
 #![warn(
     clippy::all,
     clippy::await_holding_lock,
+    clippy::char_lit_as_u8,
+    clippy::checked_conversions,
     clippy::dbg_macro,
     clippy::debug_assert_with_mut_call,
     clippy::doc_markdown,
     clippy::empty_enum,
     clippy::enum_glob_use,
     clippy::exit,
+    clippy::expl_impl_clone_on_copy,
+    clippy::explicit_deref_methods,
     clippy::explicit_into_iter_loop,
+    clippy::fallible_impl_from,
     clippy::filter_map_next,
+    clippy::float_cmp_const,
     clippy::fn_params_excessive_bools,
     clippy::if_let_mutex,
     clippy::imprecise_flops,
     clippy::inefficient_to_string,
+    clippy::invalid_upcast_comparisons,
     clippy::large_types_passed_by_value,
     clippy::let_unit_value,
     clippy::linkedlist,
     clippy::lossy_float_literal,
     clippy::macro_use_imports,
+    clippy::manual_ok_or,
     clippy::map_err_ignore,
     clippy::map_flatten,
     clippy::match_on_vec_items,
@@ -37,21 +45,31 @@
     clippy::mismatched_target_os,
     clippy::missing_errors_doc,
     clippy::missing_safety_doc,
+    clippy::mut_mut,
+    clippy::mutex_integer,
     clippy::needless_borrow,
     clippy::needless_continue,
     clippy::needless_pass_by_value,
     clippy::option_option,
+    clippy::path_buf_push_overwrite,
+    clippy::ptr_as_ptr,
     clippy::pub_enum_variant_names,
     clippy::ref_option_ref,
     clippy::rest_pat_in_fully_bound_structs,
+    clippy::same_functions_in_if_condition,
     clippy::string_add_assign,
     clippy::string_add,
+    clippy::string_lit_as_bytes,
     clippy::string_to_string,
     clippy::todo,
+    clippy::trait_duplication_in_bounds,
     clippy::unimplemented,
     clippy::unnested_or_patterns,
     clippy::unused_self,
+    clippy::useless_transmute,
     clippy::verbose_file_reads,
+    clippy::wrong_pub_self_convention,
+    clippy::zero_sized_map_values,
     future_incompatible,
     nonstandard_style,
     rust_2018_idioms
diff --git a/epaint/src/mesh.rs b/epaint/src/mesh.rs
index 58abdc413a0..9c273ac6ed9 100644
--- a/epaint/src/mesh.rs
+++ b/epaint/src/mesh.rs
@@ -60,8 +60,8 @@ impl Mesh {
 
     /// Are all indices within the bounds of the contained vertices?
     pub fn is_valid(&self) -> bool {
-        if self.vertices.len() <= u32::MAX as usize {
-            let n = self.vertices.len() as u32;
+        use std::convert::TryFrom;
+        if let Ok(n) = u32::try_from(self.vertices.len()) {
             self.indices.iter().all(|&i| i < n)
         } else {
             false
@@ -255,8 +255,8 @@ pub struct Mesh16 {
 impl Mesh16 {
     /// Are all indices within the bounds of the contained vertices?
     pub fn is_valid(&self) -> bool {
-        if self.vertices.len() <= u16::MAX as usize {
-            let n = self.vertices.len() as u16;
+        use std::convert::TryFrom;
+        if let Ok(n) = u16::try_from(self.vertices.len()) {
             self.indices.iter().all(|&i| i < n)
         } else {
             false
diff --git a/epi/src/lib.rs b/epi/src/lib.rs
index 329ed967703..741427da3de 100644
--- a/epi/src/lib.rs
+++ b/epi/src/lib.rs
@@ -17,23 +17,31 @@
 #![warn(
     clippy::all,
     clippy::await_holding_lock,
+    clippy::char_lit_as_u8,
+    clippy::checked_conversions,
     clippy::dbg_macro,
     clippy::debug_assert_with_mut_call,
     clippy::doc_markdown,
     clippy::empty_enum,
     clippy::enum_glob_use,
     clippy::exit,
+    clippy::expl_impl_clone_on_copy,
+    clippy::explicit_deref_methods,
     clippy::explicit_into_iter_loop,
+    clippy::fallible_impl_from,
     clippy::filter_map_next,
+    clippy::float_cmp_const,
     clippy::fn_params_excessive_bools,
     clippy::if_let_mutex,
     clippy::imprecise_flops,
     clippy::inefficient_to_string,
+    clippy::invalid_upcast_comparisons,
     clippy::large_types_passed_by_value,
     clippy::let_unit_value,
     clippy::linkedlist,
     clippy::lossy_float_literal,
     clippy::macro_use_imports,
+    clippy::manual_ok_or,
     clippy::map_err_ignore,
     clippy::map_flatten,
     clippy::match_on_vec_items,
@@ -43,21 +51,31 @@
     clippy::mismatched_target_os,
     clippy::missing_errors_doc,
     clippy::missing_safety_doc,
+    clippy::mut_mut,
+    clippy::mutex_integer,
     clippy::needless_borrow,
     clippy::needless_continue,
     clippy::needless_pass_by_value,
     clippy::option_option,
+    clippy::path_buf_push_overwrite,
+    clippy::ptr_as_ptr,
     clippy::pub_enum_variant_names,
     clippy::ref_option_ref,
     clippy::rest_pat_in_fully_bound_structs,
+    clippy::same_functions_in_if_condition,
     clippy::string_add_assign,
     clippy::string_add,
+    clippy::string_lit_as_bytes,
     clippy::string_to_string,
     clippy::todo,
+    clippy::trait_duplication_in_bounds,
     clippy::unimplemented,
     clippy::unnested_or_patterns,
     clippy::unused_self,
+    clippy::useless_transmute,
     clippy::verbose_file_reads,
+    clippy::wrong_pub_self_convention,
+    clippy::zero_sized_map_values,
     future_incompatible,
     nonstandard_style,
     rust_2018_idioms
diff --git a/sh/check.sh b/sh/check.sh
index 03e06491bde..bce9335d241 100755
--- a/sh/check.sh
+++ b/sh/check.sh
@@ -11,7 +11,7 @@ cargo test --workspace --doc
 cargo check --workspace --all-targets --all-features
 cargo check -p egui_demo_app --lib --target wasm32-unknown-unknown
 cargo check -p egui_demo_app --lib --target wasm32-unknown-unknown --all-features
-CARGO_INCREMENTAL=0 cargo clippy --workspace --all-targets --all-features --  -D warnings -W clippy::all
+cargo clippy --workspace --all-targets --all-features --  -D warnings -W clippy::all
 cargo test --workspace --all-targets --all-features
 cargo fmt --all -- --check