Make a copy of the raw line block data in -[LineBlock dictionary]. It looks...

Make a copy of the raw line block data in -[LineBlock dictionary]. It looks like OS 10.13 needs the data in the coder asynchronously. This was always a risky optimization. It used to work because nothing could be mutated between willEncode and the actual encoding, but it seems that is no longer the case.

sources/LineBlock.m

@@ -1387,9 +1387,8 @@ static int Search(NSString* needle,
 }
 - (NSDictionary *)dictionary {
-    NSData *rawBufferData = [NSData dataWithBytesNoCopy:raw_buffer
-                                                        length:[self rawSpaceUsed] * sizeof(screen_char_t)
-                                                  freeWhenDone:NO];
+    NSData *rawBufferData = [NSData dataWithBytes:raw_buffer
+                                           length:[self rawSpaceUsed] * sizeof(screen_char_t)];
     return @{ kLineBlockRawBufferKey: rawBufferData,
               kLineBlockBufferStartOffsetKey: @(buffer_start - raw_buffer),
               kLineBlockStartOffsetKey: @(start_offset),