DEBUG ASSERT: "hintFrameCount >= 0" in function void CachingReader::hintAndMaybeWake(const HintVector&) at src/engine/cachingreader/cachingreader.cpp:535

[mixxxbot]

Reported by: Holzhaus
Date: 2021-10-12T13:47:22Z
Status: Fix Committed
Importance: High
Launchpad Issue: lp1946759
Tags: engine, looping

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When setting a beatloop in front of the actual track (i.e. so that the end of the loop is before the first audio frame), the following debug assertion will be triggered:

    DEBUG ASSERT: "hintFrameCount >= 0" in function void CachingReader::hintAndMaybeWake(const HintVector&) at src/engine/cachingreader/cachingreader.cpp:535

Steps to reproduce:

1. Go to the beginning of the track
2. Use beatjump to go to 8 beats before the beginning of the track
3. Set a Beatloop of 4 beats
4. DEBUG_ASSERT is triggered

[mixxxbot]

Commented by: Holzhaus
Date: 2021-10-12T13:54:42Z

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2.3 seems to be unaffected, but I can reproduce this 100% of the time on 2.4-alpha-880-g7b22498e81.

[mixxxbot]

Commented by: Holzhaus
Date: 2021-10-12T14:05:22Z

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Looks like the assertion was introduced by 8589930 (#⁠1223). In 7d96c38 (#⁠3081, part of 2.3) I fixed a condition where the assertion was no longer true and hintFrameCount might be 0.

It looks like main now also makes it possible for negative values to occur?

[mixxxbot]

Commented by: Holzhaus
Date: 2021-10-12T14:21:45Z

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Also happens when using the loop in/out buttons instead of beatloops.

[mixxxbot]

Commented by: Holzhaus
Date: 2021-10-12T14:33:34Z

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#4383

[mixxxbot]

Issue closed with status Fix Committed.