From 64cdeba2ca2620002699073acf0092ff17663622 Mon Sep 17 00:00:00 2001
From: akadusei <attakusiadusei@gmail.com>
Date: Wed, 29 Apr 2026 11:02:13 +0000
Subject: [PATCH] Forward original exceptions when re-raised

---
 src/lucky/cookies/cookie_jar.cr        |  4 ++--
 src/lucky/cookies/flash_store.cr       |  2 +-
 src/lucky/errors.cr                    | 14 ++++++++------
 src/lucky/json_body_parser.cr          |  4 ++--
 src/lucky/mime_type.cr                 |  4 ++--
 src/lucky/support/message_encryptor.cr |  3 +--
 src/lucky/support/message_verifier.cr  |  2 +-
 7 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/src/lucky/cookies/cookie_jar.cr b/src/lucky/cookies/cookie_jar.cr
index fb6c709fb..3db41a13c 100644
--- a/src/lucky/cookies/cookie_jar.cr
+++ b/src/lucky/cookies/cookie_jar.cr
@@ -133,8 +133,8 @@ class Lucky::CookieJar
       raise Lucky::CookieOverflowError.new("size of '#{key}' cookie is too big")
     end
     cookies[key.to_s] = set_cookies[key.to_s] = raw_cookie
-  rescue IO::Error
-    raise InvalidCookieValueError.new(key)
+  rescue e : IO::Error
+    raise InvalidCookieValueError.new(key, cause: e)
   end
 
   private def encrypt(raw_value : String) : String
diff --git a/src/lucky/cookies/flash_store.cr b/src/lucky/cookies/flash_store.cr
index d519d837a..7fcd49187 100644
--- a/src/lucky/cookies/flash_store.cr
+++ b/src/lucky/cookies/flash_store.cr
@@ -19,7 +19,7 @@ class Lucky::FlashStore
     end
     self
   rescue e : JSON::ParseException
-    raise Lucky::InvalidFlashJSONError.new(session.get?(SESSION_KEY))
+    raise Lucky::InvalidFlashJSONError.new(session.get?(SESSION_KEY), cause: e)
   end
 
   def keep : Nil
diff --git a/src/lucky/errors.cr b/src/lucky/errors.cr
index ec3cd4ee3..67f6dbed9 100644
--- a/src/lucky/errors.cr
+++ b/src/lucky/errors.cr
@@ -19,8 +19,8 @@ module Lucky
 
     getter request
 
-    def initialize(@request : HTTP::Request)
-      super "Failed to parse the request parameters."
+    def initialize(@request : HTTP::Request, cause = nil)
+      super "Failed to parse the request parameters.", cause
     end
 
     def renderable_status : Int32
@@ -126,10 +126,11 @@ module Lucky
   class InvalidCookieValueError < Error
     getter :key
 
-    def initialize(@key : String | Symbol)
+    def initialize(@key : String | Symbol, cause = nil)
+      super(_message, cause)
     end
 
-    def message : String
+    private def _message
       <<-ERROR
       Cookie value for '#{key}' is invalid.
 
@@ -225,10 +226,11 @@ module Lucky
   class InvalidFlashJSONError < Error
     getter bad_json
 
-    def initialize(@bad_json : String?)
+    def initialize(@bad_json : String?, cause = nil)
+      super(_message, cause)
     end
 
-    def message : String?
+    private def _message
       <<-MESSAGE
       The flash messages (stored as JSON) failed to parse in a JSON parser.
       Here's what it tries to parse:
diff --git a/src/lucky/json_body_parser.cr b/src/lucky/json_body_parser.cr
index 7ce5d008f..6587475ea 100644
--- a/src/lucky/json_body_parser.cr
+++ b/src/lucky/json_body_parser.cr
@@ -12,7 +12,7 @@ class Lucky::JsonBodyParser
     else
       JSON.parse(body)
     end
-  rescue JSON::ParseException
-    raise Lucky::ParamParsingError.new(@request)
+  rescue e : JSON::ParseException
+    raise Lucky::ParamParsingError.new(@request, cause: e)
   end
 end
diff --git a/src/lucky/mime_type.cr b/src/lucky/mime_type.cr
index 4356a5328..342bde33f 100644
--- a/src/lucky/mime_type.cr
+++ b/src/lucky/mime_type.cr
@@ -218,8 +218,8 @@ class Lucky::MimeType
         # multiplied by 1000 and then handled as an integer.
         begin
           ($1.to_f32 * 1000).round.to_u16
-        rescue ArgumentError | OverflowError
-          raise InvalidMediaRange.new("#{parameter} is not a valid qvalue")
+        rescue e : ArgumentError | OverflowError
+          raise InvalidMediaRange.new("#{parameter} is not a valid qvalue", cause: e)
         end
       else
         1000u16
diff --git a/src/lucky/support/message_encryptor.cr b/src/lucky/support/message_encryptor.cr
index 74a03c7a4..b0227a1a2 100644
--- a/src/lucky/support/message_encryptor.cr
+++ b/src/lucky/support/message_encryptor.cr
@@ -61,7 +61,7 @@ module Lucky
     private def set_cipher_key(cipher) : Nil
       cipher.key = @secret
     rescue error : ArgumentError
-      raise InvalidSecretKeyBase.new(<<-MESSAGE
+      raise InvalidSecretKeyBase.new <<-MESSAGE, cause: error
         The secret key is invalid:
 
           #{error.message}
@@ -78,7 +78,6 @@ module Lucky
 
 
         MESSAGE
-      )
     end
 
     class InvalidSecretKeyBase < Exception
diff --git a/src/lucky/support/message_verifier.cr b/src/lucky/support/message_verifier.cr
index 89132ae23..387084b79 100644
--- a/src/lucky/support/message_verifier.cr
+++ b/src/lucky/support/message_verifier.cr
@@ -39,7 +39,7 @@ module Lucky
         raise(InvalidSignatureError.new)
       end
     rescue e : Base64::Error | JSON::ParseException
-      raise(InvalidSignatureError.new)
+      raise InvalidSignatureError.new(cause: e)
     end
 
     def generate(value : String | Bytes) : String