diff --git a/Compiler/Compiler.cs b/Compiler/Compiler.cs
index 6430aaced..3b033793c 100644
--- a/Compiler/Compiler.cs
+++ b/Compiler/Compiler.cs
@@ -2005,14 +2005,14 @@ private void SetOutputPlatformOption(NETGenerator.CompilerOptions compilerOption
                 }
                 if (CompilerOptions.Only32Bit)
                     compilerOptions.platformtarget = NETGenerator.CompilerOptions.PlatformTarget.x86;
-
-                // целевой framework
-                if (this.compilerDirectives.TryGetValue(TreeConverter.compiler_string_consts.compiler_directive_targetframework, out compilerDirectivesList))
+            }
+            if (compilerDirectives.TryGetValue(TreeConverter.compiler_string_consts.compiler_directive_targetframework, out compilerDirectivesList))
+            {
+                compilerOptions.TargetFramework = compilerDirectivesList[0].directive;
+                if (!(new string[] { "net40", "net403", "net45", "net451", "net452", "net46", "net461", "net462", "net47", "net471", "net472", "net48", "net481" })
+                    .Contains(compilerOptions.TargetFramework))
                 {
-                    compilerOptions.TargetFramework = compilerDirectivesList[0].directive;
-                    if (!(new string[] { "net40", "net403", "net45", "net451", "net452", "net46", "net461", "net462", "net47", "net471", "net472", "net48", "net481" })
-                        .Contains(compilerOptions.TargetFramework))
-                        ErrorsList.Add(new UnsupportedTargetFramework(compilerOptions.TargetFramework, compilerDirectivesList[0].location));
+                    ErrorsList.Add(new UnsupportedTargetFramework(compilerOptions.TargetFramework, compilerDirectivesList[0].location));
                 }
             }
         }
@@ -2329,7 +2329,7 @@ private void PrebuildMainSemanticTreeActions(out NETGenerator.CompilerOptions co
 
             compilerOptions = new NETGenerator.CompilerOptions();
 
-            // выяснение целевой платформы
+            // выяснение TargetFramework и целевой платформы
             SetOutputPlatformOption(compilerOptions);
 
             // остальные директивы
diff --git a/Configuration/GlobalAssemblyInfo.cs b/Configuration/GlobalAssemblyInfo.cs
index b4f38d3d5..35db7addf 100644
--- a/Configuration/GlobalAssemblyInfo.cs
+++ b/Configuration/GlobalAssemblyInfo.cs
@@ -15,7 +15,7 @@ internal static class RevisionClass
 	public const string Major = "3";
 	public const string Minor = "9";
 	public const string Build = "0";
-	public const string Revision = "3417";
+	public const string Revision = "3419";
 
         public const string MainVersion = Major + "." + Minor;
 	public const string FullVersion = Major + "." + Minor + "." + Build + "." + Revision;
diff --git a/Configuration/Version.defs b/Configuration/Version.defs
index b8fe50267..1866a0792 100644
--- a/Configuration/Version.defs
+++ b/Configuration/Version.defs
@@ -1,4 +1,4 @@
 %MINOR%=9
-%REVISION%=3417
+%REVISION%=3419
 %COREVERSION%=0
 %MAJOR%=3
diff --git a/Localization/DefaultLang.resources b/Localization/DefaultLang.resources
index 814fc980c..48f76c2a1 100644
Binary files a/Localization/DefaultLang.resources and b/Localization/DefaultLang.resources differ
diff --git a/Release/pabcversion.txt b/Release/pabcversion.txt
index c574e9eee..a43dac2d6 100644
--- a/Release/pabcversion.txt
+++ b/Release/pabcversion.txt
@@ -1 +1 @@
-3.9.0.3417
+3.9.0.3419
diff --git a/ReleaseGenerators/PascalABCNET_version.nsh b/ReleaseGenerators/PascalABCNET_version.nsh
index 88ab84c22..a038b53b0 100644
--- a/ReleaseGenerators/PascalABCNET_version.nsh
+++ b/ReleaseGenerators/PascalABCNET_version.nsh
@@ -1 +1 @@
-!define VERSION '3.9.0.3417'
+!define VERSION '3.9.0.3419'
diff --git a/SyntaxTreeConverters/StandardSyntaxConverter.cs b/SyntaxTreeConverters/StandardSyntaxConverter.cs
index 011649493..f664df914 100644
--- a/SyntaxTreeConverters/StandardSyntaxConverter.cs
+++ b/SyntaxTreeConverters/StandardSyntaxConverter.cs
@@ -27,7 +27,7 @@ public syntax_tree_node Convert(syntax_tree_node root)
             //            stat.ProcessNode(root);
 #endif
             // SSM 02.01.24
-            LetExprVisitor.New.ProcessNode(root);
+            //LetExprVisitor.New.ProcessNode(root);
 
             // new range - до всего! До выноса выражения с лямбдой из foreach. 11.07 добавил поиск yields и присваивание pd.HasYield
             NewRangeDesugarAndFindHasYieldVisitor.New.ProcessNode(root);
diff --git a/TestSuite/CompilationSamples/PABCSystem.pas b/TestSuite/CompilationSamples/PABCSystem.pas
index ef7d0be43..25ba0910a 100644
--- a/TestSuite/CompilationSamples/PABCSystem.pas
+++ b/TestSuite/CompilationSamples/PABCSystem.pas
@@ -8882,17 +8882,15 @@ procedure Reverse(var s: string; index, count: integer);
 
 procedure Shuffle<T>(a: array of T);
 begin
-  var n := a.Length;
-  for var i := 0 to n - 1 do
-    Swap(a[i], a[Random(n)]);
+  for var i := a.Length - 1 downto 1 do
+    Swap(a[i], a[Random(i + 1)]);
 end;
 
 procedure Shuffle<T>(l: List<T>);
 begin
-  var n := l.Count;
-  for var i := 0 to n - 1 do
+  for var i := l.Count - 1 downto 1 do
   begin
-    var ind := Random(n);
+    var ind := Random(i + 1);
     var v := l[i];
     l[i] := l[ind];
     l[ind] := v;
@@ -10756,10 +10754,9 @@ function Indices<T>(Self: List<T>; cond: (T,integer) ->boolean): sequence of int
 /// Перемешивает элементы списка случайным образом
 function Shuffle<T>(Self: List<T>): List<T>; extensionmethod;
 begin
-  var n := Self.Count;
-  for var i := 0 to n - 1 do
+  for var i := Self.Count - 1 downto 1 do
   begin
-    var r := Random(n);
+    var r := Random(i + 1);
     var v := Self[i];
     Self[i] := Self[r];
     Self[r] := v;
@@ -11814,9 +11811,8 @@ function RandomElement<T>(Self: array of T): T; extensionmethod;
 /// Перемешивает элементы массива случайным образом
 function Shuffle<T>(Self: array of T): array of T; extensionmethod;
 begin
-  var n := Self.Length;
-  for var i := 0 to n - 1 do
-    Swap(Self[i], Self[Random(n)]);
+  for var i := Self.Length - 1 downto 1 do
+    Swap(Self[i], Self[Random(i + 1)]);
   Result := Self;  
 end;
 
diff --git a/TestSuite/CompilationSamples/Tasks1Loops.pas b/TestSuite/CompilationSamples/Tasks1Loops.pas
index 91f79360c..2c5c7c786 100644
--- a/TestSuite/CompilationSamples/Tasks1Loops.pas
+++ b/TestSuite/CompilationSamples/Tasks1Loops.pas
@@ -528,7 +528,7 @@ procedure CheckTaskT(name: string);
   end;
   'Min3': begin 
     CheckData(InitialInput := |cRe|*3);
-    Generatetests(10,tRe(1,100)*2);
+    Generatetests(10,tRe(1,100)*3);
     CheckOutput(Min(Re(0),Re(1),Re(2)));
   end;
   'SeriesMin2': begin 
diff --git a/TestSuite/CompilationSamples/TasksStr.pas b/TestSuite/CompilationSamples/TasksStr.pas
index 805ca318d..a849171a0 100644
--- a/TestSuite/CompilationSamples/TasksStr.pas
+++ b/TestSuite/CompilationSamples/TasksStr.pas
@@ -282,7 +282,7 @@ procedure CheckTaskT(name: string);
   end;
   'Insert2': begin 
     CheckData(Input := Empty);
-    CheckOutput('Петр первый был великим русским императором');
+    CheckOutput('Петр Первый был великим русским императором');
   end;
   'StrChange1': begin 
     CheckData(Input := Empty);
@@ -306,7 +306,7 @@ procedure CheckTaskT(name: string);
   end;
   'StrSlice2': begin 
     CheckData(Input := Empty);
-    CheckOutputSeq(Arr('клад зарыт на юго западе', 'клад зарыт на юго западе'));
+    CheckOutputSeq(Arr('клад зарыт на юго западе', 'зашифрованное сообщение'));
   end;
   'StrSlice4': begin 
     CheckData(Input := Empty);
diff --git a/TreeConverter/LambdaExpressions/Closure/CapturedVariablesTreeBuilder.cs b/TreeConverter/LambdaExpressions/Closure/CapturedVariablesTreeBuilder.cs
index 445b45afb..b3ddc5efb 100644
--- a/TreeConverter/LambdaExpressions/Closure/CapturedVariablesTreeBuilder.cs
+++ b/TreeConverter/LambdaExpressions/Closure/CapturedVariablesTreeBuilder.cs
@@ -95,6 +95,18 @@ public override void visit(var_def_statement varDefStmt)
             }
         }
 
+
+        // SSM 2024.01.09
+        public override void visit(let_var_expr letVarExpr)
+        {
+            ProcessNode(letVarExpr.ex);
+
+            _visitor.ProcessNode(letVarExpr);
+
+            SymbolInfo si = _visitor.context.find_first(letVarExpr.id.name);
+            _currentTreeNode.VariablesDefinedInScope.Add(new CapturedVariablesTreeNode.CapturedSymbolInfo(letVarExpr, si));
+        }
+
         public override void visit(statement_list stmtList)
         {
             if (stmtList.IsInternal) // просто обойти как продолжение объемлющего statement_list
diff --git a/TreeConverter/TreeConversion/syntax_tree_visitor.cs b/TreeConverter/TreeConversion/syntax_tree_visitor.cs
index e7bcfc734..130dbd26f 100644
--- a/TreeConverter/TreeConversion/syntax_tree_visitor.cs
+++ b/TreeConverter/TreeConversion/syntax_tree_visitor.cs
@@ -19809,6 +19809,36 @@ public override void visit(SyntaxTree.var_statement node)
             ret.reset(); // SSM 19.01.17 не возвращать семантическое значение т.к. ничего не нужно добавлять в текущий список операторов!!
         }
 
+        // создать словарик чтобы для одного _visitor.context.CurrentScope.ScopeNum и для одного letVarExpr 
+        // мы заходили в этот visit один раз
+        private Dictionary<let_var_expr, List<int>> letDict = new Dictionary<let_var_expr, List<int>>();
+
+        // можно попробовать в одно ПИ не добавлять дважды - хранить словарь (let-переменная, номера ПИ в кот добавлена)
+        public override void visit(SyntaxTree.let_var_expr let_expr)
+        {
+            if (letDict.ContainsKey(let_expr) && letDict[let_expr].Contains(context.CurrentScope.ScopeNum))
+                return;
+
+            if (!letDict.ContainsKey(let_expr))
+                letDict[let_expr] = new List<int>();
+            letDict[let_expr].Add(context.CurrentScope.ScopeNum);
+
+            var exn = (expression_node)convert_strong(let_expr.ex);
+            var sav = new semantic_addr_value(exn);
+            var vds = new var_statement(let_expr.id, sav, let_expr.source_context);
+            if (let_expr.visit_var)
+            {
+                visit(vds.var_def);
+                //let_expr.visit_var = false;
+            }
+            else
+            {
+
+            }
+            return_value(exn);
+        }
+
+
         public override void visit(SyntaxTree.expression_as_statement node)
         {
             return_value((statement_node)convert_strong(node.expr));
diff --git a/bin/Lib/CRT.pas b/bin/Lib/CRT.pas
index 013f7c6f6..3ac48ff32 100644
--- a/bin/Lib/CRT.pas
+++ b/bin/Lib/CRT.pas
@@ -155,9 +155,9 @@ function ReadKey: char;// TODO продумать это
 var
   KeyInfo: ConsoleKeyInfo;
 begin
-  if NextKey <> Chr(0) then 
+  if NextKey <> #0 then 
   begin
-    ReadKey := nextkey;
+    ReadKey := NextKey;
     NextKey := #0;
   end 
   else 
@@ -172,7 +172,7 @@ function ReadKey: char;// TODO продумать это
 
 function KeyPressed: boolean;
 begin
-  KeyPressed := Console.KeyAvailable;
+  KeyPressed := (NextKey <> #0) or Console.KeyAvailable;
 end;
 
 function WindowWidth: integer;
@@ -300,4 +300,4 @@ procedure __InitModule__;
 begin
   //zdes oshibka ISConsoleApplication u nas nikogda ne inicializiruetsja
   __InitModule;
-end.
\ No newline at end of file
+end.
diff --git a/bin/Lib/PABCSystem.pas b/bin/Lib/PABCSystem.pas
index ef7d0be43..25ba0910a 100644
--- a/bin/Lib/PABCSystem.pas
+++ b/bin/Lib/PABCSystem.pas
@@ -8882,17 +8882,15 @@ procedure Reverse(var s: string; index, count: integer);
 
 procedure Shuffle<T>(a: array of T);
 begin
-  var n := a.Length;
-  for var i := 0 to n - 1 do
-    Swap(a[i], a[Random(n)]);
+  for var i := a.Length - 1 downto 1 do
+    Swap(a[i], a[Random(i + 1)]);
 end;
 
 procedure Shuffle<T>(l: List<T>);
 begin
-  var n := l.Count;
-  for var i := 0 to n - 1 do
+  for var i := l.Count - 1 downto 1 do
   begin
-    var ind := Random(n);
+    var ind := Random(i + 1);
     var v := l[i];
     l[i] := l[ind];
     l[ind] := v;
@@ -10756,10 +10754,9 @@ function Indices<T>(Self: List<T>; cond: (T,integer) ->boolean): sequence of int
 /// Перемешивает элементы списка случайным образом
 function Shuffle<T>(Self: List<T>): List<T>; extensionmethod;
 begin
-  var n := Self.Count;
-  for var i := 0 to n - 1 do
+  for var i := Self.Count - 1 downto 1 do
   begin
-    var r := Random(n);
+    var r := Random(i + 1);
     var v := Self[i];
     Self[i] := Self[r];
     Self[r] := v;
@@ -11814,9 +11811,8 @@ function RandomElement<T>(Self: array of T): T; extensionmethod;
 /// Перемешивает элементы массива случайным образом
 function Shuffle<T>(Self: array of T): array of T; extensionmethod;
 begin
-  var n := Self.Length;
-  for var i := 0 to n - 1 do
-    Swap(Self[i], Self[Random(n)]);
+  for var i := Self.Length - 1 downto 1 do
+    Swap(Self[i], Self[Random(i + 1)]);
   Result := Self;  
 end;
 
diff --git a/bin/Lib/Tasks1Loops.pas b/bin/Lib/Tasks1Loops.pas
index 91f79360c..2c5c7c786 100644
--- a/bin/Lib/Tasks1Loops.pas
+++ b/bin/Lib/Tasks1Loops.pas
@@ -528,7 +528,7 @@ procedure CheckTaskT(name: string);
   end;
   'Min3': begin 
     CheckData(InitialInput := |cRe|*3);
-    Generatetests(10,tRe(1,100)*2);
+    Generatetests(10,tRe(1,100)*3);
     CheckOutput(Min(Re(0),Re(1),Re(2)));
   end;
   'SeriesMin2': begin 
diff --git a/bin/Lib/TasksStr.pas b/bin/Lib/TasksStr.pas
index 805ca318d..a849171a0 100644
--- a/bin/Lib/TasksStr.pas
+++ b/bin/Lib/TasksStr.pas
@@ -282,7 +282,7 @@ procedure CheckTaskT(name: string);
   end;
   'Insert2': begin 
     CheckData(Input := Empty);
-    CheckOutput('Петр первый был великим русским императором');
+    CheckOutput('Петр Первый был великим русским императором');
   end;
   'StrChange1': begin 
     CheckData(Input := Empty);
@@ -306,7 +306,7 @@ procedure CheckTaskT(name: string);
   end;
   'StrSlice2': begin 
     CheckData(Input := Empty);
-    CheckOutputSeq(Arr('клад зарыт на юго западе', 'клад зарыт на юго западе'));
+    CheckOutputSeq(Arr('клад зарыт на юго западе', 'зашифрованное сообщение'));
   end;
   'StrSlice4': begin 
     CheckData(Input := Empty);