Created attachment 190448 [details]
Example HEIF that doesn't load

SUMMARY
Regression(s) from the libheif update. Unsure if related to each other.
Exporting as HEIF crashes, loading some HEIF files shows "unsupported features" error.
Thread: https://krita-artists.org/t/issue-opening-heic-files/167082

STEPS TO REPRODUCE
A. Export a file as HEIF.
B. Attempt to load attached HEIF file saved by GIMP (loading a file from a previous version of Krita works for some reason).

OBSERVED RESULT

Export a file as HEIF:
> krita.file: Starting "image/heic" encoding.
> krita.file: saving as 8bit rgba
segmentation fault
> Thread 24 Crashed:: Thread (pooled)
> 0   libsystem_platform.dylib      	       0x19932d05c _platform_memset + 108
> 1   libx265.215.dylib             	       0x11c2e2250 x265::Lowres::init(x265::PicYuv*, int) + 1400
> 2   libx265.215.dylib             	       0x11c213cd4 x265::PreLookaheadGroup::processTasks(int) + 180
> 3   libx265.215.dylib             	       0x11c210a98 x265::Lookahead::slicetypeDecide() + 692
> 4   libx265.215.dylib             	       0x11c210788 x265::Lookahead::findJob(int) + 80
> 5   libx265.215.dylib             	       0x11c21291c x265::Lookahead::getDecidedPicture() + 144
> 6   libx265.215.dylib             	       0x11c2466dc x265::Encoder::encode(x265_picture const*, x265_picture*) + 6704
> 7   libx265.215.dylib             	       0x11c25372c x265_encoder_encode + 88
> 8   libheif.1.20.2.dylib          	       0x11cfe73f0 0x11cf18000 + 848880
> 9   libheif.1.20.2.dylib          	       0x11cf881d4 0x11cf18000 + 459220
> 10  libheif.1.20.2.dylib          	       0x11cf9e244 0x11cf18000 + 549444
> 11  libheif.1.20.2.dylib          	       0x11cf9c1ac 0x11cf18000 + 541100
> 12  libheif.1.20.2.dylib          	       0x11cf9d5b8 0x11cf18000 + 546232
> 13  libheif.1.20.2.dylib          	       0x11cf4a280 0x11cf18000 + 205440
> 14  libheif.1.20.2.dylib          	       0x11cf7b848 heif_context_encode_image + 520
> 15  kritaheifexport.so            	       0x10d16ce80 heif::Context::encode_image(heif::Image const&, heif::Encoder&, heif::Context::EncodingOptions const&) + 40
> 16  kritaheifexport.so            	       0x10d16b704 HeifExport::convert(KisDocument*, QIODevice*, KisPinnedSharedPtr<KisPropertiesConfiguration>) + 7624
> 17  libkritaui.21.0.0.dylib       	       0x103472354 KisImportExportManager::doExportImpl(QString const&, QSharedPointer<KisImportExportFilter>, KisPinnedSharedPtr<KisPropertiesConfiguration>) + 312
> 18  libkritaui.21.0.0.dylib       	       0x10347129c KisImportExportManager::doExport(QString const&, QSharedPointer<KisImportExportFilter>, KisPinnedSharedPtr<KisPropertiesConfiguration>, QString) + 112

Attempt to load attached HEIF file:
> krita.file: loading heif 0 1 8
> krita.file: profile type is icc profile
Error occurs.
> The file format contains unsupported features.
Note: Before the libheif update, loading the file shows 
> loading heif 1 3 8
> profile type is icc profile
> planar heif file, bits: 8
Note2: On 6.0.0/5.3.0 -beta1, this file loads but is blank (transparent).

EXPECTED RESULT
File exports / loads correctly.

SOFTWARE/OS VERSIONS
Krita 6.0.0/5.3.0 -beta3