Error prints in terminal when debugging with /bin/jerry built in JerryScript

[qiaojingx]

Description

When using jerryscript-debugger.sh to debug with /bin/jerry executable + source.js inside JerryScript. Breakpoint can be added and removed. Sometimes, Resume/Step into/Step over/Step out/Step wil cause "unhandled protocol message type: xx".

Test Code

JerryScript Debugger & Chrome DevTools Proxy;
jerryscript/test/debugger/do_finish.js

Steps to Reproduction

1. $ cd jerryscript
2. $ python tools/build.py --jerry-debugger=on --jerry-libc=off
3. $ ./build/bin/jerry --start-debug-server --log-level 2 test/debugger/do_finish.js
4. Have Chrome running and visit the URL chrome://inspect, and click "Open dedicated DevTools for Node."
5. $ cd jerryscript-debugger-ts
6. $ yarn install
7. $ ./jerry-debugger.sh
8. Add some breakpoints.
9. Click Resume/Step into/Step over/Step out/Step

Actual Result

After step7: Error message "incorrect target debugger version detected: 3 expected 2 is print after connection setup.

After step9: Error message "unhandled protocol message type: xx" is print in terminal sometimes while Clicking Resume/Step into/Step over/Step out/Step to debug.

Expected Result

No errors occur.

Test Builds

Project	Commit Id	Target Device	Test Date	Result
jerryscript	d672d1e	Linux	Apr. 27, 2018	Fail
jerryscript-debugger-ts	ed66d7d	Linux	Apr. 27, 2018	Fail

Additional Information