Re: [Vala] Seg Fault when using printf function

[Daniel Espinosa <esodan gmail com>]

Could you file a bug report in bugzilla in order to trace it up to fix it?

El 27/11/2017 1:25 a.m., "Steven Oliver" <oliver steven gmail com> escribió:

> Hello,
> I recently upgraded my OS to Ubuntu 17.10 from 16.04 and I think I've
> discovered a bug in Vala.
>
> This commit is now causing my application to crash:
> https://github.com/steveno/balistica/commit/061a28e98f3c4468b4465e580ada78
> f11eec4461?diff=unified
>
> I don't understand what changed in that commit that breaks the
> application with my version of Vala versus the one I had on 16.04, but
> I managed to trace it down to two lines (511 & 513) in
> src/balistica_application.vala (which aren't changed in the diff !!).
> If you comment out those two lines it will compile and produce the
> drag calculation as expected.
>
> I also figured out that if you change those two lines so that the
> printf functions don't format more than two entries, it will also
> compile and produce the expected output. With a third entry, though,
> it seg faults trying to print the calculation results.
>
> Will Seg Fault:
> txtViewDragResults.buffer.text += ("Initial Velocity: %.2f ft/s Zero
> Range: %.2f yards Shooting Angle: %.2f degrees\n").printf (lsln.getMv
> (), lsln.getZerorange (), lsln.getAngle ()) ;
>
> Will print as expected:
> txtViewDragResults.buffer.text += ("Initial Velocity: %.2f ft/s Zero
> Range: %.2f yards\n").printf (lsln.getMv (), lsln.getZerorange ()) ;
>
> I have attached the C code that is generated.
>
> Hopefully that wasn't to confusing. Anyone have any thoughts? Suggestions?
>
> Steven N. Oliver
>
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