diff --git a/Cargo.toml b/Cargo.toml
index 76292ad..32dddcb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name         = "wlambda"
-version      = "0.3.0"
+version      = "0.3.1"
 authors      = ["Weird Constructor <weirdconstructor@gmail.com>"]
 license      = "GPL-3.0-or-later"
 edition      = "2018"
diff --git a/README.md b/README.md
index 413810f..712860e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,5 @@
 <img align="left" width="60" height="60" src="http://m8geil.de/data/git/wlambda/res/wlambda_logo_60.png">
 
-
 WLambda - Embeddable Scripting Language for Rust
 ================================================
 
@@ -118,10 +117,10 @@ range 0 10 1 { # This is a regular function.
     on_error {
         # handle error here, eg. report, or make a new error value
         !(err_value, line, col, file) = @;
-        displayln err_value;
+        std:displayln err_value;
     } value;
 
-    !handle_err = { displayln _ };
+    !handle_err = { std:displayln _ };
 
     # with the ~ operator, you can chain it nicely:
     on_error {|| handle_err[_] } ~ some_erroring_func[];
@@ -133,13 +132,13 @@ range 0 10 1 { # This is a regular function.
     # _? transforms an error value, and returns it from the current
     #    function. optionally jumping outwards.
 
-    wl:assert_eq (str {
+    std:assert_eq (str {
         _? ~ $e "ok"; # is with an error value the same as: `return $e "ok"`
-    }[]) "$e \"ok\"";
+    }[]) "$e[98,17:<wlambda::eval>(Err)] \"ok\"";
 
     _? 10; # passes the value through
 
-!report_my_error = { displayln _ };
+!report_my_error = { std:displayln _ };
 
 !some_erroring_func = {
     on_error {
@@ -158,7 +157,7 @@ range 0 10 1 { # This is a regular function.
 };
 
 # Basic OOP:
-# wl:weaken to make any closure capture of some_obj a weak reference, so
+# std:weaken to make any closure capture of some_obj a weak reference, so
 # we don't get any cyclic references:
 !some_obj = $&${};
 some_obj.do_something = {
@@ -190,7 +189,7 @@ you can use the GlobalEnv `add_func` method:
 ```
 use wlambda::vval::{VVal, VValFun, Env};
 
-let global_env = wlambda::prelude::create_wlamba_prelude();
+let global_env = wlambda::GlobalEnv::new_default();
 global_env.borrow_mut().add_func(
     "my_crazy_add",
     |env: &mut Env, _argc: usize| {
@@ -243,7 +242,7 @@ Future plans could be:
 - Prototyped inheritance, sketched out like this:
 
     ```norun_wlambda
-        !proto = ${ print = { displayln _ }, };
+        !proto = ${ print = { std:displayln _ }, };
         !o = to_obj ${ _proto_ = proto };
         o.print(123);
 
@@ -266,8 +265,8 @@ Future plans could be:
 
 - There are currently no plans to change the internal evaluator
 from a closure tree to a VM and/or JIT speedup.
-However, if someone is able to significantly speed up the
-evaluation this can be changed.
+However, help is appreachiated if someone is able to significantly speed up the
+evaluation without too much breakage.
 
 # License
 
diff --git a/src/compiler.rs b/src/compiler.rs
index 5fb253e..ebe934d 100644
--- a/src/compiler.rs
+++ b/src/compiler.rs
@@ -89,7 +89,7 @@ impl LocalFileModuleResolver {
 ///
 /// assert_eq!(outbuf.borrow().clone(), "1337");
 ///```
-#[derive(Debug, Clone)]
+#[derive(Default, Debug, Clone)]
 pub struct SymbolTable {
     symbols: std::collections::HashMap<String, VVal>,
 }
diff --git a/src/prelude.rs b/src/prelude.rs
index c01c383..7818d21 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -1091,7 +1091,7 @@ pub fn std_symbol_table() -> SymbolTable {
 
     func!(st, "uneg",
         |env: &mut Env, _argc: usize| {
-            Ok(VVal::Int((!(env.arg(0).i() as u32)) as i64))
+            Ok(VVal::Int(i64::from(!(env.arg(0).i() as u32))))
         }, Some(1), Some(1));
 
     func!(st, "push",
@@ -1304,7 +1304,7 @@ pub fn std_symbol_table() -> SymbolTable {
         |env: &mut Env, _argc: usize| {
             if let VVal::Byt(u) = env.arg(0) {
                 Ok(VVal::vec_mv(
-                    u.borrow().iter().map(|u| VVal::Int(*u as i64))
+                    u.borrow().iter().map(|u| VVal::Int(i64::from(*u)))
                         .collect()))
 
             } else {
@@ -1319,9 +1319,9 @@ pub fn std_symbol_table() -> SymbolTable {
             Ok(VVal::new_byt(
                 s.chars()
                  .map(|c|
-                     match c { '0'..='9' => ( 9 - (b'9' - (c as u8))) as i16,
-                               'a'..='f' => (15 - (b'f' - (c as u8))) as i16,
-                               'A'..='F' => (15 - (b'F' - (c as u8))) as i16,
+                     match c { '0'..='9' => i16::from( 9 - (b'9' - (c as u8))),
+                               'a'..='f' => i16::from(15 - (b'f' - (c as u8))),
+                               'A'..='F' => i16::from(15 - (b'F' - (c as u8))),
                                _ => -1 })
                  .fold((256, out), |(last, mut out), c: i16|
                      if c == -1 { (last, out) }
@@ -1489,7 +1489,7 @@ pub fn std_symbol_table() -> SymbolTable {
         |env: &mut Env, _argc: usize| {
             if !env.arg(0).b() {
                 if env.arg(1).is_none() {
-                    Err(StackAction::panic_msg(format!("assertion failed")))
+                    Err(StackAction::panic_msg("assertion failed".to_string()))
                 } else {
                     Err(StackAction::panic_msg(format!("assertion failed '{}'", env.arg(1).s_raw())))
                 }
diff --git a/src/vval.rs b/src/vval.rs
index 8039691..bb2d9bf 100644
--- a/src/vval.rs
+++ b/src/vval.rs
@@ -781,7 +781,7 @@ impl CycleCheck {
     }
 
     fn touch_walk(&mut self, v: &VVal) {
-        if let Some(_) = self.touch(v) { return; }
+        if self.touch(v).is_some() { return; }
 
         match v {
             VVal::Err(e) => self.touch_walk(&(*e).borrow().0),
@@ -1143,6 +1143,7 @@ impl VVal {
         VVal::Sym(String::from(s))
     }
 
+    #[allow(clippy::cast_ptr_alignment)]
     pub fn ref_id(&self) -> Option<i64> {
         Some(match self {
             VVal::Err(r)     => { &*r.borrow() as *const (VVal, SynPos) as i64 },