fix deadlock that happens when fetching blocks

[Tofel]

We do not decrease workgroup count on error :/

Tests executed:

• set block fetch timeout to 1 second and fetch 100 blocks -> code doesn't block, when call timeouts
• set block fetch timeout to 10 seconds and fetch 100 blocks -> code doesn't block, when no call timeouts

Added a ticket to add tests: https://smartcontract-it.atlassian.net/browse/TT-1604

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Below is a summarization created by an LLM (gpt-4-0125-preview). Be mindful of hallucinations and verify accuracy.

Why

The changes enhance the error handling within the asynchronous block header fetching process by ensuring the wait group counter is decremented even when an error occurs during header retrieval. This prevents potential deadlocks by guaranteeing that the wait group's count is accurately managed, allowing the process to complete as intended.

What

• seth/gas_adjuster.go: Added a wg.Done() call in the error handling section of the asynchronous block header fetching function. This ensures that the wait group count is decremented in case of an error, preventing the goroutine from blocking indefinitely.
  • Added wg.Done() within the error handling to ensure the wait group is properly decremented upon an error, facilitating error handling in concurrent operations.

[cl-sonarqube-production]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube