#4943 Manual page breaking causing assertion failure using Windows

On Sat, 9 Jan 2016 at 09:55 Chris Yate chrisyate@gmail.com wrote:

So, it turns out this was easy to minimise the code. File is attached.
It's still ~70 bars but only one voice, which is the dynamics staff of a
piano score (without anything else), so it's only silent music.

"AutoPageBreaksOff" in the score block causes the exception failure.

I note some "insane spring distance" warnings.These don't happen in the
real thing.

Chris

Note: According to Phil H's own tests: "This started in 2.19.21. 2.19.20 is OK."

[Anonymous]

Error reproduced by James L on Windows 8.1 - screenshot of error attached.

[Anonymous]

Does not occur in Linux builds.

[David Kastrup]

Pretty sure that "This started in 2.19.21. 2.19.20 is OK." is a red herring since 2.19.21 was the version where assertions were enabled for more than just --disable-optimising.

So I'll assume that the error is older than that. Probably lots older.

[Carl Sorensen]

I see the same assertion failure on OSX 10.8.5

[Carl Sorensen]

Here's a tiny example that shows the problem.

The assertion failure is triggered with 18 bars (in both 6/8 and 4/4 time) but not with 17.

[Carl Sorensen]

And I confirm that the assertion failure does not happen on LilyDev.