[Parser] test failure on parsing nested blocks

src/parser.cpp

@@ -197,10 +197,11 @@ std::unique_ptr<IfStmt> TheParser::parseIfStmt() {
       return error(nextToken.location, "expected 'else' body");
 
     falseBlock = parseBlock();
-    if (!falseBlock)
-      return nullptr;
   }
 
+  if (!falseBlock)
+    return nullptr;
+
   return std::make_unique<IfStmt>(location, std::move(condition),
                                   std::move(trueBranch), std::move(falseBlock));
 }

test/parser/error_parsing_else_block.al

@@ -0,0 +1,6 @@
+// RUN: compiler %s -ast-dump 2>&1 | filecheck %s
+fn main(): void {
+    if 0.0 {}
+    else {
+// CHECK: [[# @LINE + 2 ]]:1: error: expected '}' at the end of a block
+// CHECK: [[# @LINE + 1 ]]:1: error: expected '}' at the end of a block

test/parser/error_parsing_if_block.al

@@ -0,0 +1,5 @@
+// RUN: compiler %s -ast-dump 2>&1 | filecheck %s
+fn main(): void {
+    if 0.0 {
+// CHECK: [[# @LINE + 2 ]]:1: error: expected '}' at the end of a block
+// CHECK: [[# @LINE + 1 ]]:1: error: expected '}' at the end of a block

test/parser/error_parsing_while_block.al

@@ -0,0 +1,5 @@
+// RUN: compiler %s -ast-dump 2>&1 | filecheck %s
+fn main(): void {
+    while 0.0 {
+// CHECK: [[# @LINE + 2 ]]:1: error: expected '}' at the end of a block
+// CHECK: [[# @LINE + 1 ]]:1: error: expected '}' at the end of a block