From d016801089b2c580416674ab947d2bd0ddf3f854 Mon Sep 17 00:00:00 2001
From: michaela-mm <63740955+michaela-mm@users.noreply.github.com>
Date: Mon, 24 Feb 2025 15:35:33 +0100
Subject: [PATCH] fix: Fix bug in IF block generators. (#8780)

---
 generators/dart/logic.ts       | 4 +++-
 generators/javascript/logic.ts | 4 +++-
 generators/lua/logic.ts        | 4 +++-
 generators/php/logic.ts        | 4 +++-
 generators/python/logic.ts     | 6 +++++-
 5 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/generators/dart/logic.ts b/generators/dart/logic.ts
index 45c385b86..7e8a4709b 100644
--- a/generators/dart/logic.ts
+++ b/generators/dart/logic.ts
@@ -46,7 +46,9 @@ export function controls_if(block: Block, generator: DartGenerator) {
   } while (block.getInput('IF' + n));
 
   if (block.getInput('ELSE') || generator.STATEMENT_SUFFIX) {
-    branchCode = generator.statementToCode(block, 'ELSE');
+    branchCode = block.getInput('ELSE')
+      ? generator.statementToCode(block, 'ELSE')
+      : '';
     if (generator.STATEMENT_SUFFIX) {
       branchCode =
         generator.prefixLines(
diff --git a/generators/javascript/logic.ts b/generators/javascript/logic.ts
index 60174c85a..1e26f86e7 100644
--- a/generators/javascript/logic.ts
+++ b/generators/javascript/logic.ts
@@ -44,7 +44,9 @@ export function controls_if(block: Block, generator: JavascriptGenerator) {
   } while (block.getInput('IF' + n));
 
   if (block.getInput('ELSE') || generator.STATEMENT_SUFFIX) {
-    let branchCode = generator.statementToCode(block, 'ELSE');
+    let branchCode = block.getInput('ELSE')
+      ? generator.statementToCode(block, 'ELSE')
+      : '';
     if (generator.STATEMENT_SUFFIX) {
       branchCode =
         generator.prefixLines(
diff --git a/generators/lua/logic.ts b/generators/lua/logic.ts
index b6448445c..8e48c741a 100644
--- a/generators/lua/logic.ts
+++ b/generators/lua/logic.ts
@@ -39,7 +39,9 @@ export function controls_if(block: Block, generator: LuaGenerator): string {
   } while (block.getInput('IF' + n));
 
   if (block.getInput('ELSE') || generator.STATEMENT_SUFFIX) {
-    let branchCode = generator.statementToCode(block, 'ELSE');
+    let branchCode = block.getInput('ELSE')
+      ? generator.statementToCode(block, 'ELSE')
+      : '';
     if (generator.STATEMENT_SUFFIX) {
       branchCode =
         generator.prefixLines(
diff --git a/generators/php/logic.ts b/generators/php/logic.ts
index 731fe5708..80d4e331d 100644
--- a/generators/php/logic.ts
+++ b/generators/php/logic.ts
@@ -46,7 +46,9 @@ export function controls_if(block: Block, generator: PhpGenerator) {
   } while (block.getInput('IF' + n));
 
   if (block.getInput('ELSE') || generator.STATEMENT_SUFFIX) {
-    branchCode = generator.statementToCode(block, 'ELSE');
+    branchCode = block.getInput('ELSE')
+      ? generator.statementToCode(block, 'ELSE')
+      : '';
     if (generator.STATEMENT_SUFFIX) {
       branchCode =
         generator.prefixLines(
diff --git a/generators/python/logic.ts b/generators/python/logic.ts
index 40133600d..db1f60e2a 100644
--- a/generators/python/logic.ts
+++ b/generators/python/logic.ts
@@ -40,7 +40,11 @@ export function controls_if(block: Block, generator: PythonGenerator) {
   } while (block.getInput('IF' + n));
 
   if (block.getInput('ELSE') || generator.STATEMENT_SUFFIX) {
-    branchCode = generator.statementToCode(block, 'ELSE') || generator.PASS;
+    if (block.getInput('ELSE')) {
+      branchCode = generator.statementToCode(block, 'ELSE') || generator.PASS;
+    } else {
+      branchCode = generator.PASS;
+    }
     if (generator.STATEMENT_SUFFIX) {
       branchCode =
         generator.prefixLines(