diff --git a/assignments/PA3/Makefile b/assignments/PA3/Makefile
index c85fef4..18f3168 100644
--- a/assignments/PA3/Makefile
+++ b/assignments/PA3/Makefile
@@ -78,7 +78,7 @@ clean-compile:
 
 TESTCASE = good.cl
 comparetest: parser
-	./stdparser ${TESTCASE} > std.out
-	./myparser ${TESTCASE} > my.out
+	-./stdparser ${TESTCASE} > std.out 2>&1
+	-./myparser ${TESTCASE} > my.out 2>&1
 	diff std.out my.out
 	rm std.out my.out
\ No newline at end of file
diff --git a/assignments/PA3/bad.cl b/assignments/PA3/bad.cl
index c7102a2..0f84f7e 100644
--- a/assignments/PA3/bad.cl
+++ b/assignments/PA3/bad.cl
@@ -6,6 +6,8 @@
  *  execute "myparser bad.cl" to see the error messages that your parser
  *  generates
  *)
+-- lex_error
+*)
 
 (* no error *)
 class A {
@@ -24,6 +26,40 @@ Class D inherts A {
 };
 
 (* error:  closing brace is missing *)
-Class E inherits A {
+Class E inherits A }
 ;
+class A {
+  F(x : Int) : Object {
+    self
+  };
+};
 
+class B {
+  Y : Int;
+};
+
+Class F inherits A { 
+    scheisse: wrongtype ;
+    WrongType: scheisse;
+    scheisse <- "no type";
+    err_method1(id1: t1);
+    err_method2(id1:T1, );
+    err_method3(id1:T1):t1;
+    err_method4(id1:T1):T1;
+    err_method5();
+    good_method() : T { hallo <- 2 };
+    err_method6() { hallo <- 2 };
+    err_block() : T {
+        let a:Int <- Broken in {
+            error(s:T);
+            hello;
+            err_(s:T);
+            wow();
+        }
+    };
+    err_let() : T { 
+        {
+            let a:Int<-Bork, b:Int<-5, c:Int<-6 in a + B;
+        }
+    }
+};
diff --git a/assignments/PA3/cool.y b/assignments/PA3/cool.y
index 239ec7e..da9b106 100644
--- a/assignments/PA3/cool.y
+++ b/assignments/PA3/cool.y
@@ -181,6 +181,8 @@
     { $$ = append_Classes($1,single_Classes($2)); 
     parse_results = $$; }
     /* TODO: I guess `parse_results` is only needed in the top-most class_list*/
+    | error ';'
+    { }
     ;
     
     /* If no parent is specified, the class inherits from the Object class. */
@@ -192,7 +194,6 @@
     { $$ = class_($2,$4,$6,stringtable.add_string(curr_filename)); }
     | CLASS TYPEID INHERITS TYPEID '{' '}' ';'
     { $$ = class_($2,$4,nil_Features(),stringtable.add_string(curr_filename)); }
-    | CLASS error '{' error '}' ';'
     ;
     
     /* Feature list may be empty, but no empty features in list. */
@@ -200,6 +201,8 @@
     { $$ = single_Features($1); }
     | feature_list feature ';'
     { $$ = append_Features($1, single_Features($2)); }
+    | error ';'
+    { }
     ;
     
     feature : OBJECTID ':' TYPEID 
@@ -241,6 +244,8 @@
     { $$ = single_Expressions($1); }
     | expression_list_colon expression ';'
     { $$ = append_Expressions($1, single_Expressions($2)); }
+    | error ';'
+    { }
     ;
     
     expression : OBJECTID ASSIGN expression
@@ -336,6 +341,10 @@
     { $$ = let($1, $3, no_expr(), $5); }
     | OBJECTID ':' TYPEID ASSIGN expression IN expression %prec LETEXPR
     { $$ = let($1, $3, $5, $7); }
+    | error ',' nested_let
+    { $$ = $3; }
+    | error IN expression %prec LETEXPR
+    { $$ = $3; }
     ;
     /* end of grammar */
     %%