QGIS crashing when exporting very large image

I’m trying to export a PNG of the OS 250k raster with OS Open Rivers over the top. Trying to export the entirety of the national grid caused it to crash, so I tried again with the bottom half of Great Britain and it’s still crashing.

Here’s the crash report:

Crash ID: 1d5ed672dc1b64fc24118b59e560969ad8cbd8bb

Stack Trace

QVectorPath::convertToPainterPath :
QVectorPath::convertToPainterPath :
QVectorPath::convertToPainterPath :
QVectorPath::convertToPainterPath :
QRasterPaintEngine::fillRect :
QRasterPaintEngine::drawImage :
QgsRasterDrawer::drawImage qgsrasterdrawer.cpp:174
QgsRasterDrawer::draw qgsrasterdrawer.cpp:105
QgsRasterLayerRenderer::render qgsrasterlayerrenderer.cpp:274
QgsMapRendererCustomPainterJob::doRender qgsmaprenderercustompainterjob.cpp:312
QgsMapRendererCustomPainterJob::renderPrepared qgsmaprenderercustompainterjob.cpp:233
QgsMapRendererTask::run qgsmaprenderertask.cpp:240
QgsTask::start qgstaskmanager.cpp:78
QThreadPoolPrivate::reset :
QThread::start :
BaseThreadInitThunk :
RtlUserThreadStart :

QGIS Info
QGIS Version: 3.10.14-A Coru�a
QGIS code revision: 8374282d2a
Compiled against Qt: 5.11.2
Running against Qt: 5.11.2
Compiled against GDAL: 3.1.4
Running against GDAL: 3.1.4

System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.19042

The size of the image is 24000 * 20000 pixels at 1:250k resolution and 254 dpi (I found that 254 worked for a 16000 * 12000 file in terms of getting it to fit the canvas properly, but I don’t know if it works for this size).

I have 32 GB of RAM, so should this work?