Allow trailing semicolon

generators/packages.lock.json

@@ -49,3 +49,4 @@
     },
   }
 }
+

src/Parsing/Parser.cs

@@ -4,9 +4,11 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text;
 using Elk.Exceptions;
 using Elk.Lexing;
+using Elk.Parsing;
 using Elk.Scoping;
 using Elk.Std.Bindings;
 using Elk.Std.DataTypes;
@@ -106,6 +108,9 @@ public static (Ast ast, List<DiagnosticMessage> diagnostics) Parse(
             return null;
 
         var expr = ParseExprOrDecl();
+        if (expr == null)
+            return null;
+
         expr.IsRoot = true;
         SkipWhiteSpace();
 
@@ -250,13 +255,16 @@ private ModuleScope ImportUserModule(string path, string moduleName, TextPos pos
         return importScope;
     }
 
-    private Expr ParseExprOrDecl()
+    private Expr? ParseExprOrDecl()
     {
         SkipWhiteSpace();
 
         while (AdvanceIf(TokenKind.Semicolon))
             SkipWhiteSpace();
 
+        if (ReachedEnd)
+            return null;
+
         if (AdvanceIf(TokenKind.Pub))
         {
             SkipWhiteSpace();
@@ -1215,7 +1223,11 @@ private Expr ParseBlock(
         {
             try
             {
-                expressions.Add(ParseExprOrDecl());
+                var expr = ParseExprOrDecl();
+                if (expr == null)
+                    continue;
+
+                expressions.Add(expr);
                 if (!orAsOtherStructure)
                     continue;
 

src/ShellSession.cs

@@ -284,4 +284,4 @@ void CallOnExit()
 
         CallOnExit();
     }
-}
+}

src/packages.lock.json

@@ -28,3 +28,4 @@
     },
   }
 }
+