The cause would appear to be 32-bit versus 64-bit compilation, if I am correctly reading https://github.com/metamath/metamath-exe/issues/164

On 4/25/25 13:34, Caleb Nwokocha wrote:
Hi David,

I am using GNU GCC Compiler and I have tried these compiler flags: -std=c99, -std=c11, -std=c17, -m64

The bug is still showing.

Sincerely,

Caleb Nwokocha

On Wednesday, 23 April 2025 at 09:26:27 UTC-5 David A. Wheeler wrote:



    > On Apr 22, 2025, at 7:05 PM, Caleb Nwokocha
    <[email protected]> wrote:
    >
    > Metamath Group,
    >
    > I compiled Metamath source code on Windows 10 to make the
    executable program. Then I opened the program and it showed:
    >
    > *** BUG #1501

    I don't have a Windows 10 machine so I can't reproduce this.

    What compiler did you use? How did you compile it?
    A quick solution might be to use a different compiler.

    Here's some context:
    "BUG #1501" is the result of a failed self-check in file mminou.c.
    It's invoked in function "print2", a printing function like printf
    except
    it can also log & scroll. It's triggered when
    "backBufferPos == 0)" and "pntrLen(backBuffer)" is true;
    this should never happen.

    --- David A. Wheeler

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