[okular] [Bug 527998] New: Okular 26.11.70 crashes on load of PDF files on macOS Tahoe 26.7.2 Was working on 26.7.1

[Joseph Apuzzo]

https://bugs.kde.org/show_bug.cgi?id=527998

            Bug ID: 527998
           Summary: Okular 26.11.70 crashes on load of PDF files on macOS
                    Tahoe 26.7.2 Was working on 26.7.1
    Classification: Applications
           Product: okular
      Version First unspecified
       Reported In:
          Platform: macOS (DMG)
                OS: macOS
            Status: REPORTED
          Severity: critical
          Priority: NOR
         Component: general
          Assignee: okular-devel at kde.org
          Reporter: japuzzo at gmail.com
  Target Milestone: ---

Created attachment 197789
  --> https://bugs.kde.org/attachment.cgi?id=197789&action=edit
macOS crash report

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DESCRIPTION
Crash on PDF load

STEPS TO REPRODUCE
1.  Start Okular
2.  Open PDF
3. OS Crash

OBSERVED RESULT
Okular crashes and asked to restart in which it will

EXPECTED RESULT
Okular load and display PDF file

SOFTWARE/OS VERSIONS
OS: macOS Tahoe 26.7.2 (25G332) arm64
Host: MacBook Pro (16-inch, 2024, Three Thunderbolt 5 ports)
BIOS (mBoot): 20457.41.3
Board: J616sAP
Kernel: Darwin 25.6.0
CPU: Apple M4 Pro (10+4) @ 4.51 GHz
GPU: Apple M4 Pro (20) @ 1.58 GHz [Integrated]
Memory: 37.07 GiB / 48.00 GiB (77%)

ADDITIONAL INFORMATION
Okular 26.11.70 on Apple silicon terminated on its main thread with
EXC_BREAKPOINT / SIGTRAP; macOS reports a pointer-authentication trap while
CoreGraphics checks an image’s color space.  

The stack points to image conversion in the Qt/macOS UI path:
QImage::toCGImage() leads into CoreGraphics, during
QGuiApplication::setOverrideCursor(), while Okular is opening a document. That
suggests an invalid image or color-space object being passed through the
Qt-to-macOS graphics bridge.  

The trace doesn’t establish why that object was invalid, and it doesn’t show a
clear PDF-rendering failure. The most useful distinction to test is whether
Okular crashes opening any document or only one specific file; the former
points more toward the app/UI graphics path, while the latter may indicate a
document-specific trigger.

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