1718 stepper built in function errors not caught and crashing the frontend

[hanscau]

Description

Built In Function's Error handling throws Errors that the stepper cannot handle. Changed the errors to SourceErrors instead.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code quality improvements

How to test

Test exists, wrong expected answers

Note

BuiltInFunctionError changed to only take in explanation without node to handle all built in function error. These errors without a node should be handled by the parser instead.

Checklist

• I have tested this code
• I have updated the documentation

[coveralls]

Pull Request Test Coverage Report for Build 10778076151

Details

• 8 of 15 (53.33%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 81.543%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/stepper/lib.ts	4	11	36.36%

Totals
Change from base Build 10777866826:	0.02%
Covered Lines:	10928
Relevant Lines:	13033

---

💛 - Coveralls

[martin-henz]

Looks good!