Fix/heap corruption

[jesper-olsen]

Pull Request Template

Description

Fix heap corruption in Floyd's algorithm tests

Problem

The test test_detect_cycle_with_cycle creates a cycle in a LinkedList but doesn't break it before the list is dropped. This causes heap corruption because the Drop implementation tries to free nodes in an infinite loop, potentially causing double-frees.

Solution

Break the cycle at the end of the test by setting the tail's next pointer to None.

Testing

• Ran cargo test data_structures multiple times without heap corruption errors
• Confirmed the fix by running tests with --test-threads=1 for consistency

Fixes intermittent test failures with "Heap corruption detected" errors.

Type of change

Please delete options that are not relevant.

• [x ] Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x ] I ran bellow commands using the latest version of rust nightly.
• [x ] I ran cargo clippy --all -- -D warnings just before my last commit and fixed any issue that was found.

Note I ran cargo clippy --all -- -D warnings locally, and the build fails due to 24 existing warnings/errors (e.g., clippy::manual-is-multiple-of, clippy::needless-range-loop) in unrelated files (ciphers, math, sorting).

• [x ] I ran cargo fmt just before my last commit.
• I ran cargo test just before my last commit and all tests passed.
• [x ] I checked COUNTRIBUTING.md and my code follows its guidelines.

Please make sure that if there is a test that takes too long to run ( > 300ms), you #[ignore] that or
try to optimize your code or make the test easier to run. We have this rule because we have hundreds of
tests to run; If each one of them took 300ms, we would have to wait for a long time.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 96.92308% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.32%. Comparing base (f2a23e9) to head (9b57391).

Files with missing lines	Patch %	Lines
src/general/huffman_encoding.rs	96.72%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #913   +/-   ##
=======================================
  Coverage   95.32%   95.32%           
=======================================
  Files         319      319           
  Lines       20807    20858   +51     
=======================================
+ Hits        19834    19883   +49     
- Misses        973      975    +2     

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