qr_painter.dart, Null check operator used on a null value

[masterwok]

Describe the bug

Version: 4.1.0

Observing the following stack-trace in production DataDog logs:

#0 replaceFirstNull (/Users/vagrant/.pub-cache/hosted/pub.dev/source_span-1.10.0/lib/src/utils.dart:39)
#0 Highlighter.highlight (/Users/vagrant/.pub-cache/hosted/pub.dev/source_span-1.10.0/lib/src/highlighter.dart:224)
#1 QrPainter._initPaints (/Users/vagrant/.pub-cache/hosted/pub.dev/qr_flutter-4.1.0/lib/src/qr_painter.dart:183)

To Reproduce
Steps to reproduce the behavior:

Haven't been able to reproduce this issue locally.

Expected behavior

Should guard against null reference exception.

Screenshots

n/a

Desktop (please complete the following information):

• OS: iOS

Smartphone (please complete the following information):

• Device: iOS
• OS: 17.5.1

Additional context

n/a

[masterwok]

I believe the line numbers from the trace above aren't accurate and the issue is occuring here:

qr.flutter/lib/src/qr_painter.dart

Line 148 in d5e7206

_qrImage = QrImage(_qr!);