From d6f4fd0834ec787c82082e31de6186aad400e17d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carlos=20Henrique=20Guard=C3=A3o=20Gandarez?=
 <gandarez@gmail.com>
Date: Mon, 30 May 2022 18:09:58 -0300
Subject: [PATCH 1/2] Fix line skipping when key is empty

---
 ini_test.go | 2 ++
 parser.go   | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/ini_test.go b/ini_test.go
index 8a21eae..96e06b1 100644
--- a/ini_test.go
+++ b/ini_test.go
@@ -445,6 +445,8 @@ BiomeRarityScale: 100
 
 BiomeGroup(NormalBiomes, 3, 99, RoofedForestEnchanted, ForestSakura, FloatingJungle
 BiomeGroup(IceBiomes, 4, 85, Ice Plains)
+
+= RainForest
 `))
 			require.NoError(t, err)
 			require.NotNil(t, f)
diff --git a/parser.go b/parser.go
index ca76f5f..6629f78 100644
--- a/parser.go
+++ b/parser.go
@@ -161,7 +161,7 @@ func readKeyName(delimiters string, in []byte) (string, int, error) {
 	}
 
 	endIdx = strings.IndexAny(line, delimiters)
-	if endIdx < 0 {
+	if endIdx <= 0 {
 		return "", -1, ErrDelimiterNotFound{line}
 	}
 	return strings.TrimSpace(line[0:endIdx]), endIdx + 1, nil

From a5af1b5416f35830630eedc97d64e6df4ba135df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Carlos=20Henrique=20Guard=C3=A3o=20Gandarez?=
 <gandarez@gmail.com>
Date: Mon, 30 May 2022 19:25:30 -0300
Subject: [PATCH 2/2] fixup! Fix line skipping when key is empty

---
 error.go  | 15 +++++++++++++++
 parser.go | 11 +++++++++--
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/error.go b/error.go
index d88347c..f66bc94 100644
--- a/error.go
+++ b/error.go
@@ -32,3 +32,18 @@ func IsErrDelimiterNotFound(err error) bool {
 func (err ErrDelimiterNotFound) Error() string {
 	return fmt.Sprintf("key-value delimiter not found: %s", err.Line)
 }
+
+// ErrEmptyKeyName indicates the error type of no key name is found which there should be one.
+type ErrEmptyKeyName struct {
+	Line string
+}
+
+// IsErrEmptyKeyName returns true if the given error is an instance of ErrEmptyKeyName.
+func IsErrEmptyKeyName(err error) bool {
+	_, ok := err.(ErrEmptyKeyName)
+	return ok
+}
+
+func (err ErrEmptyKeyName) Error() string {
+	return fmt.Sprintf("empty key name: %s", err.Line)
+}
diff --git a/parser.go b/parser.go
index 6629f78..9429a33 100644
--- a/parser.go
+++ b/parser.go
@@ -161,9 +161,13 @@ func readKeyName(delimiters string, in []byte) (string, int, error) {
 	}
 
 	endIdx = strings.IndexAny(line, delimiters)
-	if endIdx <= 0 {
+	if endIdx < 0 {
 		return "", -1, ErrDelimiterNotFound{line}
 	}
+	if endIdx == 0 {
+		return "", -1, ErrEmptyKeyName{line}
+	}
+
 	return strings.TrimSpace(line[0:endIdx]), endIdx + 1, nil
 }
 
@@ -466,8 +470,9 @@ func (f *File) parse(reader io.Reader) (err error) {
 
 		kname, offset, err := readKeyName(f.options.KeyValueDelimiters, line)
 		if err != nil {
+			switch {
 			// Treat as boolean key when desired, and whole line is key name.
-			if IsErrDelimiterNotFound(err) {
+			case IsErrDelimiterNotFound(err):
 				switch {
 				case f.options.AllowBooleanKeys:
 					kname, err := p.readValue(line, parserBufferSize)
@@ -485,6 +490,8 @@ func (f *File) parse(reader io.Reader) (err error) {
 				case f.options.SkipUnrecognizableLines:
 					continue
 				}
+			case IsErrEmptyKeyName(err) && f.options.SkipUnrecognizableLines:
+				continue
 			}
 			return err
 		}