This problem is back.
I am using Xubuntu 18.04 LTS, and my Canon DSLR was working fine last night.
Today, I got a notification of the upgrade to 1.8.6, and did upgrade.
Both the Canon DSLR (and Gphoto CCD, if I set it to that) crash on startup.

Here is dmesg:

[31178.583996] usb 2-1.2.2: new high-speed USB device number 16 using ehci-pci
[31178.718069] usb 2-1.2.2: New USB device found, idVendor=04a9, idProduct=323b
[31178.718075] usb 2-1.2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[31178.718078] usb 2-1.2.2: Product: Canon Digital Camera
[31178.718080] usb 2-1.2.2: Manufacturer: Canon Inc.
[31178.823885] usb 2-1.2.3: new high-speed USB device number 17 using ehci-pci
[31178.964723] usb 2-1.2.3: New USB device found, idVendor=1618, idProduct=0920
[31178.964727] usb 2-1.2.3: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[31179.479973] usb 2-1.2.3: USB disconnect, device number 17
[31181.007893] usb 2-1.2.3: new high-speed USB device number 18 using ehci-pci
[31181.140627] usb 2-1.2.3: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 64
[31181.140632] usb 2-1.2.3: config 1 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 64
[31181.141061] usb 2-1.2.3: New USB device found, idVendor=1618, idProduct=0921
[31181.141065] usb 2-1.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[31181.141068] usb 2-1.2.3: Product: QHY5-II
[31181.141070] usb 2-1.2.3: Manufacturer: QHY-CCD
[31182.921406] indi_canon_ccd[30585]: segfault at 100001df1 ip 0000559e63e11100 sp 00007ffe1ab8ccc0 error 6 in indi_gphoto_ccd[559e63e01000+24000]

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