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  1. Update: Cannot reproduce problem on minimal...

    Update: Cannot reproduce problem on minimal equivalent code. Suggests a more complex interaction with the rest of my code.

    I can however demonstrate that the cause of it from updating 1.42 to 1.46...
  2. It's not quite over yet, although the Teensy no...

    It's not quite over yet, although the Teensy no longer hangs at Serial1.end(), I do not receive any data from it upon request over Serial1. I comment out Serial1.end() and then communications are...
  3. Ok, this is rather bizarre. Now I cannot...

    Ok, this is rather bizarre. Now I cannot reproduce the problem anymore, after being stuck with it for an entire day. KurtE is correct, but why on Earth did, at that time, commenting out Serial1.end()...
  4. Minimal code to reproduce the bug. It's SPI + Serial1 combo that causes it!

    Okay, I have found out specifically what causes it! It is only when SPI.begin() is called in combination with Serial1.end(). Does not matter what order. Here is the minimal code that reproduces the...
  5. Serial1.end() crash in TD 1.46 but not in 1.42

    I just upgraded straight from TD 1.42 to 1.46 on Arduino IDE 1.8.9. Uploading code that was unchanged since 08/18 using this new version caused my Teensy 3.2 to hang. After considerable commenting...
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