Fix Failing Tests in Codebase | Dataford Interview Questions

Given an existing Python codebase with failing test cases, find the bug(s) and fix the code so the tests pass.

Asked in the Karat debugging round stage. The starter function is merge_intervals(intervals). It must return a new list of merged, non-overlapping intervals sorted by start value. Intervals that overlap or touch must be merged.

Signature: def merge_intervals(intervals):

Examples:

[[1, 3], [2, 6], [8, 10]] returns [[1, 6], [8, 10]] because the first two intervals overlap.
[[5, 7], [1, 3], [3, 5]] returns [[1, 7]] because touching intervals are merged.

Constraints: Each interval has two integers with start <= end; input length is at most 1,000; the input list must not be modified.

Constraints

0 <= len(intervals) <= 1,000
Each interval contains exactly two integers
For every interval, start <= end
Intervals that touch, such as [1, 3] and [3, 5], must be merged
The input list and its interval lists must not be modified

Function Signature

def merge_intervals(intervals):

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