Snapshot compatibility

[gmalakov]

I have a problem. When I want to deploy an app to a server. I create snapshot. Before version 1.11 I was able to create snapshot on my windows machine and upload it to a linux server without a problem. Now when I create snapshot with 1.11.1 on windows x32 and upload to a linux x64 with the exactly same version of dart 1.11.1 i get the message "Segmentation fault".
Dart snapshot compatibility is a great problem because otherwise I have to upload the whole source tree to the server leaving my code unprotected like it's in php and etc. I hope solution for this will come out soon.
I'm now able to do dart2js --output-type=dart --categories=Server app.dart --out=out.dart
But script says it's deprecated and will not be available on the next version and it leaves also unprotected code.

[fsc8000]

Seems like a bug in the VM's snapshot code. It should work across OS platforms.

Do you have a sample file to reproduce the segmentation fault?

[gmalakov]

I think that's the one.
It runs on Windows but doesn't run in Linux x64. However if I rebuild on
server. Everything is fine.

2015-07-13 14:45 GMT+03:00 Florian Schneider notifications@github.com:

Seems like a bug in the VM's snapshot code. It should work across OS
platforms.

Do you have a sample file to reproduce the segmentation fault?

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Reply to this email directly or view it on GitHub
#23834 (comment).

[gmalakov]

And is there a opportunity these snapshots to become executable across versions etc if it's built on 1.10 to run on 1.12 across time. That should be very nice indeed.

[fsc8000]

Unfortunately, there is no cross-version compatibility of snapshots. Snapshots are only guaranteed to work with the exact same version of the SDK. However, a segfault should not occur. Instead an error message should appear. I don't know of any plans to support this.

Do you have a script that you can share which exhibits your problem (where versions match, but OS platforms are different), so that we can reproduce it locally?

[gmalakov]

Yes, the snapshot I sent you is built on 1.11.1 Win x32. It should work on
win32 but shouldn't on Linux x64.

2015-07-13 15:42 GMT+03:00 Florian Schneider notifications@github.com:

Unfortunately, there is no cross-version compatibility of snapshots.
Snapshots are only guaranteed to work with the exact same version of the
SDK. However, a segfault should not occur. Instead an error message should
appear. I don't know of any plans to support this.

Do you have a script that you can share which exhibits your problem (where
versions match, but OS platforms are different), so that we can reproduce
it locally?

—
Reply to this email directly or view it on GitHub
#23834 (comment).

[fsc8000]

Where can I find your snapshot? I does not seem to attached to the issue.

[gmalakov]

I sent it with the email. I cannot attach the snapshot there !

[fsc8000]

Hm ok. It seems that github does not attach file to issues when replying via email. Can you upload it somewhere else and post ? Or paste sample Dart script here?

[zoechi]

It might work to attach it if you change the .zip extension to .jpg.
You can store the on some cloud drive and post a link here.

[sethladd]

Dropbox is also a good way to easily host binaries with public URLs.

[gmalakov]

I'll try jpeg variant.

[fsc8000]

Have you tried using the Windows 64-bit version? Snapshots are not compatible between 32- and 64-bit versions of the SDK.

[gmalakov]

No but I'm now using Linux x64. that helps

2015-07-15 15:42 GMT+03:00 Florian Schneider notifications@github.com:

Have you tried using the Windows 64-bit version? Snapshots are not
compatible between 32- and 64-bit versions of the SDK.

—
Reply to this email directly or view it on GitHub
#23834 (comment).

[fsc8000]

Ok, the issue has nothing to do with Windows. I see the same issue when trying to run a Linux 32-bit snapshot on a 64-bit VM.

The VM should provide a proper error message instead of segfaulting.