From c35f9a395c69411f19cc855007327ba57d9e0805 Mon Sep 17 00:00:00 2001
From: Fabian Muecke <fabian.muecke@deepl.com>
Date: Fri, 15 Jul 2022 15:21:20 +0200
Subject: [PATCH] Fix infinite loop when parsing unknown parameter attribute
 (#300)

---
 Sources/MockingbirdGenerator/Parser/Models/Function.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sources/MockingbirdGenerator/Parser/Models/Function.swift b/Sources/MockingbirdGenerator/Parser/Models/Function.swift
index 1ce45e94..81362ee9 100644
--- a/Sources/MockingbirdGenerator/Parser/Models/Function.swift
+++ b/Sources/MockingbirdGenerator/Parser/Models/Function.swift
@@ -97,7 +97,7 @@ struct Function: CustomStringConvertible, CustomDebugStringConvertible, Serializ
               mutableComponent = mutableComponent.dropFirst("@autoclosure".count)
             } else if mutableComponent.hasPrefix("@") { // Unknown parameter attribute.
               logWarning("Ignoring unknown parameter attribute \(String(mutableComponent).singleQuoted) in function type declaration \(String(serialized).singleQuoted)")
-              let index = mutableComponent.firstIndex(where: { !$0.isLetter && !$0.isNumber })
+                let index = mutableComponent.dropFirst().firstIndex(where: { !$0.isLetter && !$0.isNumber })
                 ?? mutableComponent.endIndex
               mutableComponent = mutableComponent[index...]
             } else if mutableComponent == "inout" {