I can see that it's mail but the cause I have no idea. Second time it has happened in Sonoma. Mail is just running in the background.
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Translated Report (Full Report Below)
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Process: Mail [1658]
Path: /System/Applications/Mail.app/Contents/MacOS/Mail
Identifier: com.apple.mail
Version: 16.0 (3774.500.171.1.1)
Build Info: Mail_App-3774500171001001~13
Code Type: ARM-64 (Native)
Parent Process: launchd [1]
User ID: 501
Date/Time: 2024-04-07 12:02:06.2073 -0700
OS Version: macOS 14.4.1 (23E224)
Report Version: 12
Anonymous UUID: 761C5C29-5BBD-078A-ABEB-86F07CA61331
Time Awake Since Boot: 340000 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGKILL)
Exception Codes: UNKNOWN_0x105 at 0x00000000dac11a30
Exception Codes: 0x0000000000000105, 0x00000000dac11a30
Termination Reason: Namespace PAC_EXCEPTION, Code 261
VM Region Info: 0xdac11a30 is not in any region. Bytes before following region: 671114704
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
__TEXT 102c18000-103030000 [ 4192K] r-x/r-x SM=COW /System/Applications/Mail.app/Contents/MacOS/Mail
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Translated Report (Full Report Below)
-------------------------------------
Process: Mail [1658]
Path: /System/Applications/Mail.app/Contents/MacOS/Mail
Identifier: com.apple.mail
Version: 16.0 (3774.500.171.1.1)
Build Info: Mail_App-3774500171001001~13
Code Type: ARM-64 (Native)
Parent Process: launchd [1]
User ID: 501
Date/Time: 2024-04-07 12:02:06.2073 -0700
OS Version: macOS 14.4.1 (23E224)
Report Version: 12
Anonymous UUID: 761C5C29-5BBD-078A-ABEB-86F07CA61331
Time Awake Since Boot: 340000 seconds
System Integrity Protection: enabled
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGKILL)
Exception Codes: UNKNOWN_0x105 at 0x00000000dac11a30
Exception Codes: 0x0000000000000105, 0x00000000dac11a30
Termination Reason: Namespace PAC_EXCEPTION, Code 261
VM Region Info: 0xdac11a30 is not in any region. Bytes before following region: 671114704
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
__TEXT 102c18000-103030000 [ 4192K] r-x/r-x SM=COW /System/Applications/Mail.app/Contents/MacOS/Mail