Repetitive calaccessd crashes: illegal multi-threaded access to database connection

Originator:joe
Number:rdar://33723615 Date Originated:8/4/2017
Status:Duplicate Resolved:
Product:iOS Product Version:11.0 15A5327g
Classification:Crash Reproducible:No
 
While trying to diagnose another issue, I observed calaccessd crashing several times a day, as indicated in attached logs. I have been unable to identify a trigger or cause.

Hardware Model:      iPhone9,2
Process:             calaccessd [180]
Path:                /System/Library/PrivateFrameworks/CalendarDaemon.framework/Support/calaccessd
Identifier:          calaccessd
Version:             ???
Code Type:           ARM-64 (Native)
Role:                Unspecified
Parent Process:      launchd [1]
Coalition:           com.apple.calaccessd [307]


Date/Time:           2017-08-04 09:24:54.4334 -0400
Launch Time:         2017-08-04 09:13:25.8000 -0400
OS Version:          iPhone OS 11.0 (15A5327g)
Baseband Version:    2.16.00
Report Version:      104

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x00000001829106bc
Termination Signal: Trace/BPT trap: 5
Termination Reason: Namespace SIGNAL, Code 0x5
Terminating Process: exc handler [0]
Triggered by Thread:  1

Application Specific Information:
BUG IN CLIENT OF sqlite3.dylib: illegal multi-threaded access to database connection


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Marked as duplicate of 33459318

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