[troclaux]

Proposed Changes

• Tracker.Start() read t.timeStart without holding t.mutex, while startWithoutLock() (reached via Increment, IncrementWithError, SetValue or another Start()) writes it under the lock. Calling Start() while another goroutine feeds progress is a data race; two concurrent Start() calls could also both see a zero timeStart and start twice.
• Start() now takes the write lock, checks timeStart.IsZero() and calls startWithoutLock() in one critical section, the same pattern IsStarted() and incrementWithoutLock() use.
• Added TestTracker_Start_Concurrent: two goroutines call Start() while two call Increment(1) on the same tracker. Before the fix, go test -race -run TestTracker_Start_Concurrent ./progress/ fails with WARNING: DATA RACE (tracker.go:202 read vs. tracker.go:261 write). After the fix it passes over 20 runs.

Testing: make test (fmt, vet, golangci-lint, gocyclo, tests with 100% coverage) and make test-race both pass.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[coveralls]

Coverage Report for CI Build 39819707428

Coverage remained the same at 100.0%

Details

• Coverage remained the same as the base build.
• Patch coverage: 3 of 3 lines across 1 file are fully covered (100%).
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	5166
Covered Lines:	5166
Line Coverage:	100.0%
Coverage Strength:	1.21 hits per line

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💛 - Coveralls