I seem to be seeing this now.  The other suggested possibilities when reporting were bugz #1200934, #1200819 & #1383852.  I can see on this bug that some questions were posed.  

> what accounts he/she has configured, whether any are from Ubuntu Online Accounts or GNOME Online Accounts?
I have a personal GoogleMail imapx account created though the Online Accounts Service and an ews OWA account linked to my work exchange server.  

> whether it crashes also when he/she runs the evolution-source-registry  from a terminal manually?
It seems to have worked OK when I ran /usr/lib/evolution/evolution-source-registry.  The output I can see is as follow (with my addresses changed manually to <email address hidden> & <email address hidden>): 
$ /usr/lib/evolution/evolution-source-registry
Migrating mail accounts from GConf...
Migrating addressbook sources from GConf...
Migrating calendar sources from GConf...
Migrating task list sources from GConf...
Migrating memo list sources from GConf...
Registering EGoogleBackendFactory ('google')
Registering EOutlookBackendFactory ('outlook')
Registering EYahooBackendFactory ('yahoo')
Registering EOwncloudBackendFactory ('owncloud')
Registering EEwsBackendFactory ('ews')
Registering EMapiBackendFactory ('mapi')
Registering ECollectionBackendFactory ('none')
Adding 1433155791.2289.1@thorne-ul-dt ('Source')
Adding vfolder ('Source_1')
Adding 1433325395.16396.0@thorne-ul-dt ('Source_2')
OWA <email address hidden>: Pairing 1434544712.3155.0@thorne-ul-dt with resource e82c1433-e2e3-4cbf-a933-0f1e68930f98:Global Address List
Adding 1434544712.3155.0@thorne-ul-dt ('Source_3')
Adding 1434381690.5760.2@thorne-ul-dt ('Source_4')
Adding 1434381690.5760.17@thorne-ul-dt ('Source_5')
Adding 1437989181.5803.1@thorne-ul-dt ('Source_6')
Adding 1434381690.5760.0@thorne-ul-dt ('Source_7')
Adding 1432804779.11643.0@thorne-ul-dt ('Source_8')
Adding 1434381690.5760.5@thorne-ul-dt ('Source_9')
Adding 1432718461.14988.73@thorne-ul-dt ('Source_10')
Adding 1432718462.14988.82@thorne-ul-dt ('Source_11')
Adding 1432718461.14988.68@thorne-ul-dt ('Source_12')
Adding 1432889488.2725.0@thorne-ul-dt ('Source_13')
Adding 1432889488.2725.2@thorne-ul-dt ('Source_14')
Adding 1432889488.2725.3@thorne-ul-dt ('Source_15')
Adding 1432640797.18834.16@thorne-ul-dt ('Source_16')
Adding 1432640797.18834.14@thorne-ul-dt ('Source_17')
Adding 1432640791.18834.0@thorne-ul-dt ('Source_18')
Adding local ('Source_19')
Adding 1432889488.2725.1@thorne-ul-dt ('Source_20')
Adding 1432640791.18834.4@thorne-ul-dt ('Source_21')
Adding 1433155649.2289.0@thorne-ul-dt ('Source_22')
Adding caldav-stub ('Source_23')
Adding contacts-stub ('Source_24')
Adding birthdays ('Source_25')
Adding google-stub ('Source_26')
Adding ldap-stub ('Source_27')
Adding local-stub ('Source_28')
Adding system-calendar ('Source_29')
Adding system-address-book ('Source_30')
Adding weather-stub ('Source_31')
Adding webcal-stub ('Source_32')
Adding webdav-stub ('Source_33')
Adding sendmail ('Source_34')
Adding system-memo-list ('Source_35')
Adding system-task-list ('Source_36')
module-cache-reaper-Message: Scanning data directories
module-cache-reaper-Message: Scanning cache directories
Server is up and running...
AUTH (1434381690.5760.2@thorne-ul-dt): Initiated
Bus name 'org.gnome.evolution.dataserver.Sources2' acquired.
<email address hidden>: Pairing 1432889488.2725.4@thorne-ul-dt with resource Calendar
Adding 1432889488.2725.4@thorne-ul-dt ('Source_37')
<email address hidden>: Pairing 1432889488.2725.5@thorne-ul-dt with resource Contacts
Adding 1432889488.2725.5@thorne-ul-dt ('Source_38')
<email address hidden>: Pairing 1432640844.2689.0@thorne-ul-dt with resource Calendar
Adding 1432640844.2689.0@thorne-ul-dt ('Source_39')
<email address hidden>: Pairing 1432640844.2689.1@thorne-ul-dt with resource Contacts
Adding 1432640844.2689.1@thorne-ul-dt ('Source_40')
AUTH (1432640797.18834.16@thorne-ul-dt): Initiated
AUTH (1434381690.5760.2@thorne-ul-dt): Complete (SUCCESS)
AUTH (1434381690.5760.2@thorne-ul-dt): Initiated
AUTH (1432640797.18834.16@thorne-ul-dt): Complete (SUCCESS)
OWA <email address hidden>: Pairing 1434382914.8424.11@thorne-ul-dt with resource AQMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAALgAAA+FP9N9wssFJj6t++ut4zlABABYLVCVV+HBMs/5Q8mHfMpkAAAMsAAAA
Adding 1434382914.8424.11@thorne-ul-dt ('Source_41')
OWA <email address hidden>: Pairing 1434382914.8424.12@thorne-ul-dt with resource AQMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAALgAAA+FP9N9wssFJj6t++ut4zlABABYLVCVV+HBMs/5Q8mHfMpkAAAMtAAAA
Adding 1434382914.8424.12@thorne-ul-dt ('Source_42')
OWA <email address hidden>: Pairing 1434382914.8424.13@thorne-ul-dt with resource AAMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAuAAAAAADhT/TfcLLBSY+rfvrreM5QAQAGKp/LPBeQR4xLDDWtTzVlAAAAFwAgAAA=
Adding 1434382914.8424.13@thorne-ul-dt ('Source_43')
OWA <email address hidden>: Pairing 1434382914.8424.14@thorne-ul-dt with resource AAMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAuAAAAAADhT/TfcLLBSY+rfvrreM5QAQAGKp/LPBeQR4xLDDWtTzVlAAAAFwAYAAA=
Adding 1434382914.8424.14@thorne-ul-dt ('Source_44')
OWA <email address hidden>: Pairing 1434382914.8424.15@thorne-ul-dt with resource AAMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAuAAAAAADhT/TfcLLBSY+rfvrreM5QAQAGKp/LPBeQR4xLDDWtTzVlAAAAFwAVAAA=
Adding 1434382914.8424.15@thorne-ul-dt ('Source_45')
OWA <email address hidden>: Pairing 1434382914.8424.16@thorne-ul-dt with resource AQMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAALgAAA+FP9N9wssFJj6t++ut4zlABABYLVCVV+HBMs/5Q8mHfMpkAAAMwAAAA
Adding 1434382914.8424.16@thorne-ul-dt ('Source_46')
OWA <email address hidden>: Pairing 1434382914.8424.17@thorne-ul-dt with resource AAMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAuAAAAAADhT/TfcLLBSY+rfvrreM5QAQAGKp/LPBeQR4xLDDWtTzVlAAAAFwAFAAA=
Adding 1434382914.8424.17@thorne-ul-dt ('Source_47')
OWA <email address hidden>: Pairing 1434382914.8424.18@thorne-ul-dt with resource AQMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAALgAAA+FP9N9wssFJj6t++ut4zlABABYLVCVV+HBMs/5Q8mHfMpkAAAMxAAAA
Adding 1434382914.8424.18@thorne-ul-dt ('Source_48')
OWA <email address hidden>: Pairing 1434382914.8424.19@thorne-ul-dt with resource AAMkAGIyMTMwOGY0LTI2MzItNDU5My05Y2I4LWVhNjNhYjg1YmYwMAAuAAAAAADhT/TfcLLBSY+rfvrreM5QAQAGKp/LPBeQR4xLDDWtTzVlAAAAFwAWAAA=
Adding 1434382914.8424.19@thorne-ul-dt ('Source_49')
Adding 1439892977.25610.10@thorne-ul-dt ('Source_50')
Adding 1434382890.8424.1@thorne-ul-dt ('Source_51')
Adding 1439892980.25610.11@thorne-ul-dt ('Source_52')
AUTH (1434381690.5760.2@thorne-ul-dt): Complete (SUCCESS)
AUTH (1434381690.5760.2@thorne-ul-dt): Initiated
AUTH (1434381690.5760.2@thorne-ul-dt): Complete (SUCCESS)
AUTH (1434381690.5760.2@thorne-ul-dt): Initiated
AUTH (1434381690.5760.2@thorne-ul-dt): Complete (SUCCESS)
AUTH (1434381690.5760.2@thorne-ul-dt): Initiated
AUTH (1434381690.5760.2@thorne-ul-dt): Complete (SUCCESS)
AUTH (1434381690.5760.2@thorne-ul-dt): Initiated
AUTH (1434381690.5760.2@thorne-ul-dt): Complete (SUCCESS)
AUTH (1434381690.5760.2@thorne-ul-dt): Initiated
AUTH (1434381690.5760.2@thorne-ul-dt): Complete (SUCCESS)
---


> whether running the source registry under valgrind will also reproduce the crash (it can happen that other timing, due to all slowness caused by the memory checking, will not trigger the crash, but also that the valgrind will log about the issue and will keep the application running). The command might look like (I do not know exact location of the executable, thus it can differ in your distribution):
  $ G_SLICE=always-malloc valgrind /usr/libexec/evolution-source-registry &>log"

I shall attempt the last steps and get back to you.