Eof exception when reading data from SWF file

I attempted to read data from the following SWF files:

http://i.flipline.com/gamefiles/cactusmccoycot/cactusmccoy_v2_1.swf
http://i.flipline.com/gamefiles/cactusmccoy2/cactusmccoy2_v2_1.swf

with the following code:
```haxe
final handle = File.read(swfPath, true);
final swfReader = new Reader(handle);
trace(swfReader.read().tags.length);
```
using the --interp target with Haxe 4.2.2 and format 3.5.0.

This resulted in the following error for cactusmccoy_v2_1.swf:
```
C:\HaxeToolkit\haxe\std/haxe/io/BytesInput.hx:101: characters 4-9 : Uncaught exception Eof
C:\HaxeToolkit\haxe\std/haxe/io/Input.hx:244: characters 13-23 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:963: characters 29-43 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:1354: characters 18-39 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:608: characters 12-21 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:1360: characters 15-28 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:608: characters 12-21 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:1423: characters 11-24 : Called from here
src/export/CMCoyExporter.hx:37: characters 15-31 : Called from here
src/export/CMCoyExporter.hx:16: characters 9-52 : Called from here
```
and the following error for cactusmccoy2_v2_1.swf:
```
C:\HaxeToolkit\haxe\std/haxe/io/BytesInput.hx:101: characters 4-9 : Uncaught exception Eof
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:59: characters 12-24 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:961: characters 68-83 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:1354: characters 18-39 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:608: characters 12-21 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:1360: characters 15-28 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:608: characters 12-21 : Called from here
C:\HaxeToolkit\haxe\lib\format/3,5,0/format/swf/Reader.hx:1423: characters 11-24 : Called from here
src/export/CMCoyExporter.hx:37: characters 15-31 : Called from here
src/export/CMCoyExporter.hx:16: characters 9-53 : Called from here
```

What might be causing this and can it be fixed?