fix(codegen): save side effect expression

BeyondMagic · Copilot · web-flow · commit cbe0d16c1abc · 2025-11-25T15:39:37.000-03:00
Co-authored-by: Copilot &lt;175728472+Copilot@users.noreply.github.com&gt;
diff --git a/src/codegen_lua.c b/src/codegen_lua.c
@@ -170,6 +170,11 @@ static void emit_statement(FILE *out, const AstStmt *stmt, const FunctionTable *
 			{
 				return; // Dead Code Elimination: remove unused locals without side effects
 			}
+			// Unused variable with initializer that has side effects: emit only the initializer as a statement
+			emit_indent(out, indent);
+			emit_expression_expected(out, stmt->data.decl.init, functions, stmt->data.decl.type);
+			fputc('\n', out);
+			return;
 		}
 
 		if (stmt->data.decl.is_array)

Original file line number	Diff line number	Diff line change
`@@ -170,6 +170,11 @@ static void emit_statement(FILE out, const AstStmt stmt, const FunctionTable *`
`170`	`170`	`{`
`171`	`171`	`return; // Dead Code Elimination: remove unused locals without side effects`
`172`	`172`	`}`
	`173`	`+ // Unused variable with initializer that has side effects: emit only the initializer as a statement`
	`174`	`+ emit_indent(out, indent);`
	`175`	`+ emit_expression_expected(out, stmt->data.decl.init, functions, stmt->data.decl.type);`
	`176`	`+ fputc('\n', out);`
	`177`	`+ return;`
`173`	`178`	`}`
`174`	`179`
`175`	`180`	`if (stmt->data.decl.is_array)`