When Font Asset is created from the "Font Asset Creator" window with Font Settings of Atlas Resolution 8192, 8192, and Render Mode is set to SDF32 then it causes the editor to crash, refer the attached video.

Steps to repro:
1. Create a new project.
2. Window > Package Manager > TextMeshPro(3.0.0-Preview.13) > Install
3. Window > TextMeshPro > Font Asset Creator
4. Import TMP Essentials > Import TMP Examples & Extras
5. Font Asset Creator > Font Settings > Select Font (Anton, Bangers)
6. Atlas Resolution > 8192, 8192
7. Render Mode > SDF32 > Generate Font Atlas > Wait till the Font Asset create

Actual Result:
Editor crashes when Font Asset is created using Atlas Resolution 8192, 8192 and Render Mode is set to SDF32

Expected Result:
Font Asset is created gracefully

Occurring on:
2020.2.0a14, 2020.1.0b12, 2019.3.15f1, 2019.2.13f1, 2019.1.11f1, 2018.4.24f1

with package version 3.0.0-preview.13, 3.0.0-preview.1, 2.0.1, 2.0.0, 1.4.0, 1.3.0

Environment:
Windows10 and macOS 10.14

Stack trace:
========== OUTPUTTING STACK TRACE ==================

0x00007FF6E0A968DA (Unity) TextCore::Generate_SDF
0x00007FF6E0AA15A7 (Unity) TextCore::RenderGlyphToTextureJob
0x00007FF6DFA47F40 (Unity) JobQueue::Exec
0x00007FF6DFA4FA92 (Unity) JobQueue::Steal
0x00007FF6DFA48900 (Unity) JobQueue::ExecuteJobFromQueue
0x00007FF6DFA4A4AB (Unity) JobQueue::ProcessJobs
0x00007FF6DFA50E8F (Unity) JobQueue::WorkLoop
0x00007FF6E0071845 (Unity) Thread::RunThreadWrapper
0x00007FFC09EC7BD4 (KERNEL32) BaseThreadInitThunk
0x00007FFC0B60CE51 (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========