Index: src/OFHTTPResponse.m
==================================================================
--- src/OFHTTPResponse.m
+++ src/OFHTTPResponse.m
@@ -212,14 +212,16 @@
 
 		if ([name isEqual: @"charset"])
 			charset = value;
 	}
 
-	@try {
-		ret = OFStringEncodingParseName(charset);
-	} @catch (OFInvalidArgumentException *e) {
-		ret = OFStringEncodingAutodetect;
+	ret = OFStringEncodingAutodetect;
+	if (charset != nil) {
+		@try {
+			ret = OFStringEncodingParseName(charset);
+		} @catch (OFInvalidArgumentException *e) {
+		}
 	}
 
 	return ret;
 }
 

Index: src/OFXMLParser.h
==================================================================
--- src/OFXMLParser.h
+++ src/OFXMLParser.h
@@ -41,11 +41,11 @@
  * @param target The target of the processing instruction
  * @param text The text of the processing instruction
  */
 -			  (void)parser: (OFXMLParser *)parser
   foundProcessingInstructionWithTarget: (OFString *)target
-				  text: (OFString *)text;
+				  text: (nullable OFString *)text;
 
 /**
  * @brief This callback is called when the XML parser found the start of a new
  *	  tag.
  *

Index: src/exceptions/OFBindUNIXSocketFailedException.h
==================================================================
--- src/exceptions/OFBindUNIXSocketFailedException.h
+++ src/exceptions/OFBindUNIXSocketFailedException.h
@@ -41,11 +41,11 @@
  * @param path The path on which binding failed
  * @param socket The socket which could not be bound
  * @param errNo The errno of the error that occurred
  * @return A new, autoreleased bind UNIX socket failed exception
  */
-+ (instancetype)exceptionWithPath: (OFString *)path
++ (instancetype)exceptionWithPath: (nullable OFString *)path
 			   socket: (id)socket
 			    errNo: (int)errNo;
 
 + (instancetype)exceptionWithSocket: (id)socket
 			      errNo: (int)errNo OF_UNAVAILABLE;
@@ -56,13 +56,13 @@
  * @param path The path on which binding failed
  * @param socket The socket which could not be bound
  * @param errNo The errno of the error that occurred
  * @return An initialized bind UNIX socket failed exception
  */
-- (instancetype)initWithPath: (OFString *)path
+- (instancetype)initWithPath: (nullable OFString *)path
 		      socket: (id)socket
 		       errNo: (int)errNo OF_DESIGNATED_INITIALIZER;
 
 - (instancetype)initWithSocket: (id)socket errNo: (int)errNo OF_UNAVAILABLE;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/runtime/private.h
==================================================================
--- src/runtime/private.h
+++ src/runtime/private.h
@@ -37,11 +37,11 @@
 	unsigned long version;
 	unsigned long info;
 	long instanceSize;
 	struct objc_ivar_list *_Nullable ivars;
 	struct objc_method_list *_Nullable methodList;
-	struct objc_dtable *_Nonnull dTable;
+	struct objc_dtable *_Nullable dTable;
 	Class _Nullable *_Nullable subclassList;
 	void *_Nullable siblingClass;
 	struct objc_protocol_list *_Nullable protocols;
 	void *_Nullable GCObjectType;
 	unsigned long ABIVersion;

Index: utils/ofarc/Archive.h
==================================================================
--- utils/ofarc/Archive.h
+++ utils/ofarc/Archive.h
@@ -18,15 +18,15 @@
 #import "OFArray.h"
 
 OF_ASSUME_NONNULL_BEGIN
 
 @protocol Archive <OFObject>
-+ (instancetype)archiveWithPath: (OFString *)path
++ (instancetype)archiveWithPath: (nullable OFString *)path
 			 stream: (OF_KINDOF(OFStream *))stream
 			   mode: (OFString *)mode
 		       encoding: (OFStringEncoding)encoding;
-- (instancetype)initWithPath: (OFString *)path
+- (instancetype)initWithPath: (nullable OFString *)path
 		      stream: (OF_KINDOF(OFStream *))stream
 			mode: (OFString *)mode
 		    encoding: (OFStringEncoding)encoding;
 - (void)listFiles;
 - (void)extractFiles: (OFArray OF_GENERIC(OFString *) *)files;

Index: utils/ofarc/OFArc.m
==================================================================
--- utils/ofarc/OFArc.m
+++ utils/ofarc/OFArc.m
@@ -486,15 +486,17 @@
 	}
 
 	[OFApplication terminateWithStatus: _exitStatus];
 }
 
-- (id <Archive>)openArchiveWithPath: (OFString *)path
+- (id <Archive>)openArchiveWithPath: (OFString *)path_
 			       type: (OFString *)type
 			       mode: (char)mode
 			   encoding: (OFStringEncoding)encoding
 {
+	/* To make clang-analyzer happy about assigning nil to path later. */
+	OFString *path = path_;
 	OFString *modeString, *fileModeString;
 	OFStream *file = nil;
 	id <Archive> archive = nil;
 
 	[_archivePath release];
@@ -645,15 +647,15 @@
 	}
 
 	return archive;
 
 error:
-	if (mode == 'c')
+	if (mode == 'c' && path != nil)
 		[[OFFileManager defaultManager] removeItemAtPath: path];
 
 	[OFApplication terminateWithStatus: 1];
-	return nil;
+	abort();
 }
 
 - (bool)shouldExtractFile: (OFString *)fileName
 	      outFileName: (OFString *)outFileName
 {