/Drv/Udp/ByteStreamPoll assert

[danjwait]

I've build a Gps app w/ F' v3.0.0 (though, my error, from the devel branch) w/ the intent of helping update the pre-v3/FPP Gps tutorial. I started that work on a branch from fork of F' devel some months ago. Once that app was working, I fetched the latest F' devel and branched from that to see if my demo still worked with the latest devel branch, and it does not.

The app starts up and then faults out:

pi@raspberrypi:~ $ sudo ./GpsApp -a 192.123.12.123 -p 50000 -d /dev/ttyAMA1
Hit Ctrl-C to quit
[INFO] Opened GPS UART driver: /dev/ttyAMA1
EVENT: (1280) (2:1653451760,294148) DIAGNOSTIC: (cmdDisp) OpCodeRegistered : Opcode 0xf00 registered to port 0 slot 0
EVENT: (1280) (2:1653451760,294209) DIAGNOSTIC: (cmdDisp) OpCodeRegistered : Opcode 0xf01 registered to port 0 slot 1
EVENT: (1280) (2:1653451760,294259) DIAGNOSTIC: (cmdDisp) OpCodeRegistered : Opcode 0x500 registered to port 1 slot 2
EVENT: (1280) (2:1653451760,294300) DIAGNOSTIC: (cmdDisp) OpCodeRegistered : Opcode 0x501 registered to port 1 slot 3
...
EVENT: (1280) (2:1653451760,295410) DIAGNOSTIC: (cmdDisp) OpCodeRegistered : Opcode 0x4b01 registered to port 8 slot 31
EVENT: (3335) (2:1653451760,295518) ACTIVITY_HI: (prmDb) PrmFileLoadComplete : Parameter file load completed. Read 1 records.
[ERROR] Failed to send framed data: 1
EVENT: (512) (2:1653451760,297758) DIAGNOSTIC: (rateGroup1Comp) RateGroupStarted : Rate group started.
EVENT: (768) (2:1653451760,297898) DIAGNOSTIC: (rateGroup2Comp) RateGroupStarted : Rate group started.
EVENT: (1024) (2:1653451760,298058) DIAGNOSTIC: (rateGroup3Comp) RateGroupStarted : Rate group started.
Assert file "/home/djwait/02_Projects/fprime/GpsApp/build-fprime-automatic-raspberrypi/F-Prime/Drv/Udp/ByteStreamPollPo
FATAL 16896 handled.
[ERROR] Failed to send framed data: 1
Connected to 192.168.86.153:50000 as a tcp client
Exiting with segfault and core dump file.
Segmentation fault

I've copied the same app-specific files into both my original branch and the post-fetch branch; the app build from those files on original branch runs fine on the RPi, connects to the GDS (running on a Win 11 WSL2 host if that helps) and I can send commands & get data back and forth host-target-GPS device. The same procedure with the post-fetch repeatedly results in that Assert.

While I'm trying to track down exactly what broke I figured I'd ask here in case there was a known change in behavior of /Drv/Udp/ByteStreamPoll that I've missed.

Thanks!

[danjwait]

I never did figure out what changed; I just fetched latest /devel and branched from that an restarted. Seems to work now, posted to https://github.com/danjwait/fprime/tree/GpsApp/GpsApp