Debugger shows <unknown>:Nothing (?) while debugging frequently

[transmissions11]

While debugging recently I've noticed that the code panel goes completely blank. Is this normal?

If you'd like a reproduction case clone this branch, run make, and then run dapp debug and select VaultFactoryTest::test_deploy_vault(). After stepping through the trace for a little bit you will notice the code panel go blank:

https://github.com/rari-Capital/vaults/tree/v1

[MrChico]

is it blank all the time for this contract? Or just in some sections?

[transmissions11]

is it blank all the time for this contract? Or just in some sections?

Just some sections.

[tcoulter]

I get this a lot as well, sometimes in very large blocks.

Similar reproduction steps:

1. Clone this repo: https://github.com/tcoulter/sai
2. Run dapp debug
3. Choose the test CageTest::testCageExistAfterPeriod() (it happens frequently there, though you'll likely reproduce it with many of these tests)
4. Press n to step through until you see the same error as the OP.

From my experience, it seems related to contract creation, as it appears to happen a lot during the non-constructor code related to contract creation. This is only a hunch however.

As a feature request, it'd be great if I could step over anything unknown.

Environment:

• Windows Subsystem for Linux v2 (Ubuntu 20.04.1 LTS)
• dapp 0.33.0
• solc, the solidity compiler commandline interface
• Version: 0.8.6+commit.11564f7e.Linux.g++
• hevm 0.47.0

[MrChico]

As a feature request, it'd be great if I could step over anything unknown.

you can step to the next piece of source code with shift-N, or step forward through the bytecode without entering subcalls with control-n

[tcoulter]

In the case above, I do use shift-N. When it reaches anything unknown, it steps through the instructions as if I was just pressing N alone.

Edit: I guess I didn't specify that above. Perhaps that's a bug!

[transmissions11]

In the case above, I do use shift-N. When it reaches anything unknown, it steps through the instructions as if I was just pressing N alone.

Edit: I guess I didn't specify that above. Perhaps that's a bug!

yup same. should have specified as well oop 😅

doesn't feel good to be stepping thru things smoothly with N and then hit a 2 second patch of abyss

[transmissions11]

@MrChico @d-xo bumping because running into this while debugging some complex tests rn and its slowing me down quite a bit heh

[MrChico]

Not sure we can do much about the fact that srccode is missing for parts of the code, but we can fix the N and c-n issue

[transmissions11]

but we can fix the N and c-n issue

yup, thats what i was hoping for 🙏

[transmissions11]

btw i dont see this issue with c-n, but i do sometimes see with c-p

[transmissions11]

bump hehe

[transmissions11]

[tcoulter]

I’ve been switching tools like Leo switches girlfriends (between multiple projects, mind you), so haven’t gotten back to my dapptools project yet. Once I do I’ll let you know!

…

On Tue, Oct 5, 2021 at 9:12 PM t11s ***@***.***> wrote: [image: Screen Shot 2021-10-05 at 9 12 20 PM] <https://user-images.githubusercontent.com/26209401/136139567-0d937786-0ae8-47c8-bf21-bbe0ace00ef4.png> — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#686 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAWTVPSTRSKVVFGOSOKW7DUFPEEJANCNFSM47V2SM4Q> .

[transmissions11]

hehe i just want the debugger to skip the Nothing (?) screens when stepping thru with shift + N/shift + P

[tcoulter]

Oops, me too! I somehow thought you were the maintainer looking for more info (I responded via email, so my bad!).

…

On Tue, Oct 5, 2021 at 10:16 PM t11s ***@***.***> wrote: hehe i just want the debugger to skip the Nothing (?) screens when stepping thru with shift + N — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#686 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAWTVOF3HCUGRV5RUFWFCDUFPLR5ANCNFSM47V2SM4Q> .

[d-xo]

@transmissions11 had been kinda avoiding this one since the source map parser and format are quite mysterious to me 🙈, think I have a fix, would be great if you could test it out.