Unable to decode an Image

[frankmer]

RangeError (length): Invalid value: Not in inclusive range 0..13: 4294967295

#0   _Array.[] (dart:core-patch/array.dart)
#1   new BmpInfo (package:image/src/formats/bmp/bmp_info.dart:92:44)
#2   BmpDecoder.startDecode (package:image/src/formats/bmp_decoder.dart:34:19)
#3   BmpDecoder.decode (package:image/src/formats/bmp_decoder.dart:123:9)
#4   decodeImage (package:image/src/formats/formats.dart:233:19)

This error occurs when I try to decode an image. The header of the image is:

42 4D 4C 00 00 00 00 00
00 00 1A 00 00 00 0C 00
18 00

The filename ends with ".png" but because the header starts with BML it got recognized as BMP which header starts with BM.
My google research did not tell me what type of header this is. PNG usually starts with "89 50 4E 47 0D 0A 1A 0A" but not this one.
Every image viewer I tried was able to show me the image.

[brendan-duncan]

If you could send me the problematic image, I can take a look at it. Too hard to say what's going on with it from just this info.

You're correct, if those are the first bytes of the file, that is not a PNG header. It does resemble a BMP header, where the BMP signature is 0x4D42. But it seems like the header data starts to fall apart at about the width value, and the compression type (that you don't have in the provided data) is certainly not something that's expected.