diff --git a/pkg/rudus.d.ts b/pkg/rudus.d.ts
index 329ab57..a5ebfa8 100644
--- a/pkg/rudus.d.ts
+++ b/pkg/rudus.d.ts
@@ -14,8 +14,8 @@ export interface InitOutput {
   readonly __wbindgen_malloc: (a: number, b: number) => number;
   readonly __wbindgen_realloc: (a: number, b: number, c: number, d: number) => number;
   readonly __wbindgen_export_6: WebAssembly.Table;
-  readonly closure346_externref_shim: (a: number, b: number, c: any) => void;
-  readonly closure370_externref_shim: (a: number, b: number, c: any, d: any) => void;
+  readonly closure328_externref_shim: (a: number, b: number, c: any) => void;
+  readonly closure341_externref_shim: (a: number, b: number, c: any, d: any) => void;
   readonly __wbindgen_start: () => void;
 }
 
diff --git a/pkg/rudus.js b/pkg/rudus.js
index 6935c0e..6eb1ee0 100644
--- a/pkg/rudus.js
+++ b/pkg/rudus.js
@@ -17,22 +17,6 @@ function handleError(f, args) {
     }
 }
 
-function logError(f, args) {
-    try {
-        return f.apply(this, args);
-    } catch (e) {
-        let error = (function () {
-            try {
-                return e instanceof Error ? `${e.message}\n\nStack:\n${e.stack}` : e.toString();
-            } catch(_) {
-                return "<failed to stringify thrown value>";
-            }
-        }());
-        console.error("wasm-bindgen: imported JS function that was not marked as `catch` threw an error:", error);
-        throw e;
-    }
-}
-
 const cachedTextDecoder = (typeof TextDecoder !== 'undefined' ? new TextDecoder('utf-8', { ignoreBOM: true, fatal: true }) : { decode: () => { throw Error('TextDecoder not available') } } );
 
 if (typeof TextDecoder !== 'undefined') { cachedTextDecoder.decode(); };
@@ -70,8 +54,6 @@ const encodeString = (typeof cachedTextEncoder.encodeInto === 'function'
 
 function passStringToWasm0(arg, malloc, realloc) {
 
-    if (typeof(arg) !== 'string') throw new Error(`expected a string argument, found ${typeof(arg)}`);
-
     if (realloc === undefined) {
         const buf = cachedTextEncoder.encode(arg);
         const ptr = malloc(buf.length, 1) >>> 0;
@@ -100,7 +82,7 @@ function passStringToWasm0(arg, malloc, realloc) {
         ptr = realloc(ptr, len, len = offset + arg.length * 3, 1) >>> 0;
         const view = getUint8ArrayMemory0().subarray(ptr + offset, ptr + len);
         const ret = encodeString(arg, view);
-        if (ret.read !== arg.length) throw new Error('failed to pass whole string');
+
         offset += ret.written;
         ptr = realloc(ptr, len, offset, 1) >>> 0;
     }
@@ -122,12 +104,6 @@ function isLikeNone(x) {
     return x === undefined || x === null;
 }
 
-function _assertBoolean(n) {
-    if (typeof(n) !== 'boolean') {
-        throw new Error(`expected a boolean argument, found ${typeof(n)}`);
-    }
-}
-
 const CLOSURE_DTORS = (typeof FinalizationRegistry === 'undefined')
     ? { register: () => {}, unregister: () => {} }
     : new FinalizationRegistry(state => {
@@ -158,71 +134,6 @@ function makeMutClosure(arg0, arg1, dtor, f) {
     CLOSURE_DTORS.register(real, state, state);
     return real;
 }
-
-function debugString(val) {
-    // primitive types
-    const type = typeof val;
-    if (type == 'number' || type == 'boolean' || val == null) {
-        return  `${val}`;
-    }
-    if (type == 'string') {
-        return `"${val}"`;
-    }
-    if (type == 'symbol') {
-        const description = val.description;
-        if (description == null) {
-            return 'Symbol';
-        } else {
-            return `Symbol(${description})`;
-        }
-    }
-    if (type == 'function') {
-        const name = val.name;
-        if (typeof name == 'string' && name.length > 0) {
-            return `Function(${name})`;
-        } else {
-            return 'Function';
-        }
-    }
-    // objects
-    if (Array.isArray(val)) {
-        const length = val.length;
-        let debug = '[';
-        if (length > 0) {
-            debug += debugString(val[0]);
-        }
-        for(let i = 1; i < length; i++) {
-            debug += ', ' + debugString(val[i]);
-        }
-        debug += ']';
-        return debug;
-    }
-    // Test for built-in
-    const builtInMatches = /\[object ([^\]]+)\]/.exec(toString.call(val));
-    let className;
-    if (builtInMatches && builtInMatches.length > 1) {
-        className = builtInMatches[1];
-    } else {
-        // Failed to match the standard '[object ClassName]'
-        return toString.call(val);
-    }
-    if (className == 'Object') {
-        // we're a user defined class or Object
-        // JSON.stringify avoids problems with cycles, and is generally much
-        // easier than looping through ownProperties of `val`.
-        try {
-            return 'Object(' + JSON.stringify(val) + ')';
-        } catch (_) {
-            return 'Object';
-        }
-    }
-    // errors
-    if (val instanceof Error) {
-        return `${val.name}: ${val.message}\n${val.stack}`;
-    }
-    // TODO we could test for more things here, like `Set`s and `Map`s.
-    return className;
-}
 /**
  * @param {string} src
  * @returns {Promise<string>}
@@ -234,19 +145,12 @@ export function ludus(src) {
     return ret;
 }
 
-function _assertNum(n) {
-    if (typeof(n) !== 'number') throw new Error(`expected a number argument, found ${typeof(n)}`);
-}
-function __wbg_adapter_22(arg0, arg1, arg2) {
-    _assertNum(arg0);
-    _assertNum(arg1);
-    wasm.closure346_externref_shim(arg0, arg1, arg2);
+function __wbg_adapter_20(arg0, arg1, arg2) {
+    wasm.closure328_externref_shim(arg0, arg1, arg2);
 }
 
-function __wbg_adapter_52(arg0, arg1, arg2, arg3) {
-    _assertNum(arg0);
-    _assertNum(arg1);
-    wasm.closure370_externref_shim(arg0, arg1, arg2, arg3);
+function __wbg_adapter_50(arg0, arg1, arg2, arg3) {
+    wasm.closure341_externref_shim(arg0, arg1, arg2, arg3);
 }
 
 async function __wbg_load(module, imports) {
@@ -291,7 +195,7 @@ function __wbg_get_imports() {
         const ret = arg0.call(arg1, arg2);
         return ret;
     }, arguments) };
-    imports.wbg.__wbg_error_7534b8e9a36f1ab4 = function() { return logError(function (arg0, arg1) {
+    imports.wbg.__wbg_error_7534b8e9a36f1ab4 = function(arg0, arg1) {
         let deferred0_0;
         let deferred0_1;
         try {
@@ -301,7 +205,7 @@ function __wbg_get_imports() {
         } finally {
             wasm.__wbindgen_free(deferred0_0, deferred0_1, 1);
         }
-    }, arguments) };
+    };
     imports.wbg.__wbg_io_5a3c8ea72d8c6ea3 = function() { return handleError(function (arg0, arg1) {
         let deferred0_0;
         let deferred0_1;
@@ -314,7 +218,7 @@ function __wbg_get_imports() {
             wasm.__wbindgen_free(deferred0_0, deferred0_1, 1);
         }
     }, arguments) };
-    imports.wbg.__wbg_log_86d603e98cc11395 = function() { return logError(function (arg0, arg1) {
+    imports.wbg.__wbg_log_86d603e98cc11395 = function(arg0, arg1) {
         let deferred0_0;
         let deferred0_1;
         try {
@@ -324,11 +228,11 @@ function __wbg_get_imports() {
         } finally {
             wasm.__wbindgen_free(deferred0_0, deferred0_1, 1);
         }
-    }, arguments) };
-    imports.wbg.__wbg_log_9e426f8e841e42d3 = function() { return logError(function (arg0, arg1) {
+    };
+    imports.wbg.__wbg_log_9e426f8e841e42d3 = function(arg0, arg1) {
         console.log(getStringFromWasm0(arg0, arg1));
-    }, arguments) };
-    imports.wbg.__wbg_log_edeb598b620f1ba2 = function() { return logError(function (arg0, arg1) {
+    };
+    imports.wbg.__wbg_log_edeb598b620f1ba2 = function(arg0, arg1) {
         let deferred0_0;
         let deferred0_1;
         try {
@@ -338,15 +242,15 @@ function __wbg_get_imports() {
         } finally {
             wasm.__wbindgen_free(deferred0_0, deferred0_1, 1);
         }
-    }, arguments) };
-    imports.wbg.__wbg_new_23a2665fac83c611 = function() { return logError(function (arg0, arg1) {
+    };
+    imports.wbg.__wbg_new_23a2665fac83c611 = function(arg0, arg1) {
         try {
             var state0 = {a: arg0, b: arg1};
             var cb0 = (arg0, arg1) => {
                 const a = state0.a;
                 state0.a = 0;
                 try {
-                    return __wbg_adapter_52(a, state0.b, arg0, arg1);
+                    return __wbg_adapter_50(a, state0.b, arg0, arg1);
                 } finally {
                     state0.a = a;
                 }
@@ -356,65 +260,65 @@ function __wbg_get_imports() {
         } finally {
             state0.a = state0.b = 0;
         }
-    }, arguments) };
-    imports.wbg.__wbg_new_8a6f238a6ece86ea = function() { return logError(function () {
+    };
+    imports.wbg.__wbg_new_8a6f238a6ece86ea = function() {
         const ret = new Error();
         return ret;
-    }, arguments) };
-    imports.wbg.__wbg_newnoargs_105ed471475aaf50 = function() { return logError(function (arg0, arg1) {
+    };
+    imports.wbg.__wbg_newnoargs_105ed471475aaf50 = function(arg0, arg1) {
         const ret = new Function(getStringFromWasm0(arg0, arg1));
         return ret;
-    }, arguments) };
-    imports.wbg.__wbg_now_8dddb61fa4928554 = function() { return logError(function () {
+    };
+    imports.wbg.__wbg_now_8dddb61fa4928554 = function() {
         const ret = Date.now();
         return ret;
-    }, arguments) };
-    imports.wbg.__wbg_queueMicrotask_97d92b4fcc8a61c5 = function() { return logError(function (arg0) {
+    };
+    imports.wbg.__wbg_queueMicrotask_97d92b4fcc8a61c5 = function(arg0) {
         queueMicrotask(arg0);
-    }, arguments) };
-    imports.wbg.__wbg_queueMicrotask_d3219def82552485 = function() { return logError(function (arg0) {
+    };
+    imports.wbg.__wbg_queueMicrotask_d3219def82552485 = function(arg0) {
         const ret = arg0.queueMicrotask;
         return ret;
-    }, arguments) };
-    imports.wbg.__wbg_random_57c118f142535bb6 = function() { return logError(function () {
+    };
+    imports.wbg.__wbg_random_57c118f142535bb6 = function() {
         const ret = Math.random();
         return ret;
-    }, arguments) };
-    imports.wbg.__wbg_resolve_4851785c9c5f573d = function() { return logError(function (arg0) {
+    };
+    imports.wbg.__wbg_resolve_4851785c9c5f573d = function(arg0) {
         const ret = Promise.resolve(arg0);
         return ret;
-    }, arguments) };
-    imports.wbg.__wbg_stack_0ed75d68575b0f3c = function() { return logError(function (arg0, arg1) {
+    };
+    imports.wbg.__wbg_stack_0ed75d68575b0f3c = function(arg0, arg1) {
         const ret = arg1.stack;
         const ptr1 = passStringToWasm0(ret, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
         const len1 = WASM_VECTOR_LEN;
         getDataViewMemory0().setInt32(arg0 + 4 * 1, len1, true);
         getDataViewMemory0().setInt32(arg0 + 4 * 0, ptr1, true);
-    }, arguments) };
-    imports.wbg.__wbg_static_accessor_GLOBAL_88a902d13a557d07 = function() { return logError(function () {
+    };
+    imports.wbg.__wbg_static_accessor_GLOBAL_88a902d13a557d07 = function() {
         const ret = typeof global === 'undefined' ? null : global;
         return isLikeNone(ret) ? 0 : addToExternrefTable0(ret);
-    }, arguments) };
-    imports.wbg.__wbg_static_accessor_GLOBAL_THIS_56578be7e9f832b0 = function() { return logError(function () {
+    };
+    imports.wbg.__wbg_static_accessor_GLOBAL_THIS_56578be7e9f832b0 = function() {
         const ret = typeof globalThis === 'undefined' ? null : globalThis;
         return isLikeNone(ret) ? 0 : addToExternrefTable0(ret);
-    }, arguments) };
-    imports.wbg.__wbg_static_accessor_SELF_37c5d418e4bf5819 = function() { return logError(function () {
+    };
+    imports.wbg.__wbg_static_accessor_SELF_37c5d418e4bf5819 = function() {
         const ret = typeof self === 'undefined' ? null : self;
         return isLikeNone(ret) ? 0 : addToExternrefTable0(ret);
-    }, arguments) };
-    imports.wbg.__wbg_static_accessor_WINDOW_5de37043a91a9c40 = function() { return logError(function () {
+    };
+    imports.wbg.__wbg_static_accessor_WINDOW_5de37043a91a9c40 = function() {
         const ret = typeof window === 'undefined' ? null : window;
         return isLikeNone(ret) ? 0 : addToExternrefTable0(ret);
-    }, arguments) };
-    imports.wbg.__wbg_then_44b73946d2fb3e7d = function() { return logError(function (arg0, arg1) {
+    };
+    imports.wbg.__wbg_then_44b73946d2fb3e7d = function(arg0, arg1) {
         const ret = arg0.then(arg1);
         return ret;
-    }, arguments) };
-    imports.wbg.__wbg_then_48b406749878a531 = function() { return logError(function (arg0, arg1, arg2) {
+    };
+    imports.wbg.__wbg_then_48b406749878a531 = function(arg0, arg1, arg2) {
         const ret = arg0.then(arg1, arg2);
         return ret;
-    }, arguments) };
+    };
     imports.wbg.__wbindgen_cb_drop = function(arg0) {
         const obj = arg0.original;
         if (obj.cnt-- == 1) {
@@ -422,19 +326,11 @@ function __wbg_get_imports() {
             return true;
         }
         const ret = false;
-        _assertBoolean(ret);
         return ret;
     };
-    imports.wbg.__wbindgen_closure_wrapper7697 = function() { return logError(function (arg0, arg1, arg2) {
-        const ret = makeMutClosure(arg0, arg1, 347, __wbg_adapter_22);
+    imports.wbg.__wbindgen_closure_wrapper984 = function(arg0, arg1, arg2) {
+        const ret = makeMutClosure(arg0, arg1, 329, __wbg_adapter_20);
         return ret;
-    }, arguments) };
-    imports.wbg.__wbindgen_debug_string = function(arg0, arg1) {
-        const ret = debugString(arg1);
-        const ptr1 = passStringToWasm0(ret, wasm.__wbindgen_malloc, wasm.__wbindgen_realloc);
-        const len1 = WASM_VECTOR_LEN;
-        getDataViewMemory0().setInt32(arg0 + 4 * 1, len1, true);
-        getDataViewMemory0().setInt32(arg0 + 4 * 0, ptr1, true);
     };
     imports.wbg.__wbindgen_init_externref_table = function() {
         const table = wasm.__wbindgen_export_2;
@@ -448,12 +344,10 @@ function __wbg_get_imports() {
     };
     imports.wbg.__wbindgen_is_function = function(arg0) {
         const ret = typeof(arg0) === 'function';
-        _assertBoolean(ret);
         return ret;
     };
     imports.wbg.__wbindgen_is_undefined = function(arg0) {
         const ret = arg0 === undefined;
-        _assertBoolean(ret);
         return ret;
     };
     imports.wbg.__wbindgen_string_get = function(arg0, arg1) {
diff --git a/pkg/rudus_bg.wasm b/pkg/rudus_bg.wasm
index 1130998..677e41b 100644
Binary files a/pkg/rudus_bg.wasm and b/pkg/rudus_bg.wasm differ
diff --git a/pkg/rudus_bg.wasm.d.ts b/pkg/rudus_bg.wasm.d.ts
index e177a90..ffdd83f 100644
--- a/pkg/rudus_bg.wasm.d.ts
+++ b/pkg/rudus_bg.wasm.d.ts
@@ -9,6 +9,6 @@ export const __wbindgen_free: (a: number, b: number, c: number) => void;
 export const __wbindgen_malloc: (a: number, b: number) => number;
 export const __wbindgen_realloc: (a: number, b: number, c: number, d: number) => number;
 export const __wbindgen_export_6: WebAssembly.Table;
-export const closure346_externref_shim: (a: number, b: number, c: any) => void;
-export const closure370_externref_shim: (a: number, b: number, c: any, d: any) => void;
+export const closure328_externref_shim: (a: number, b: number, c: any) => void;
+export const closure341_externref_shim: (a: number, b: number, c: any, d: any) => void;
 export const __wbindgen_start: () => void;