pre-build all step failed

[letmejustputthishere]

when running basic_scenario after successfully completing the previous steps, the following error occured

❯ ./run_basic_scenario.sh  # from Bash
Using identity: "default".
Setting ICP/XDR conversion rate to 10000 ...
Using NNS URLs: ["http://localhost:8000/"]
Title: Updating Xdr/Icp conversion rate to 10000

Summary: Set ICP/XDR conversion rate to 10000

Payload: UpdateIcpXdrConversionRatePayload {
    data_source: "IC admin",
    timestamp_seconds: 1713853482,
    xdr_permyriad_per_icp: 10000,
    reason: None,
}
submit_proposal for Updating Xdr/Icp conversion rate to 10000 response: Ok(proposal 9)
proposal 9
Using identity: "default".
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  645k  100  645k    0     0   560k      0  0:00:01  0:00:01 --:--:-- 2453k
Using identity: "default".
Creating canister test...
test canister created with canister id: bkyz2-fmaaa-aaaaa-qaaaq-cai
Installing code for canister test, with canister ID bkyz2-fmaaa-aaaaa-qaaaq-cai
warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
OK
Using identity: "default".
Using identity: "default".
Invoking dfx with `dfx`. dfx version: dfx 0.19.0
Added as controller of "bkyz2-fmaaa-aaaaa-qaaaq-cai": r7inp-6aaaa-aaaaa-aaabq-cai
Using identity: "default".
Using identity: "default".
Using identity: "default".
Using identity: "default".
Using identity: "default".
Creating a wallet canister on the local network.
The wallet canister on the "local" network for user "default" is "bd3sg-teaaa-aaaaa-qaaba-cai"
Fabricating 2345000000000000 cycles onto bd3sg-teaaa-aaaaa-qaaba-cai
Fabricated 2345000000000000 cycles, updated balance: 2_445_000_000_000_000 cycles
Depositing 200000000000000 cycles onto qaa6y-5yaaa-aaaaa-aaafa-cai
Deposited 200000000000000 cycles.
Importing all canisters from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/nns/dfx.json
Importing canister 'cycles-minting' as 'nns-cycles-minting'
Importing /Users/moritz/projects/sns-testing/candid/nns-cycles-minting.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/nns/cmc/cmc.did
cycles-minting canister id on network 'local' is rkp4c-7iaaa-aaaaa-aaaca-cai
Importing canister 'genesis-token' as 'nns-genesis-token'
Importing /Users/moritz/projects/sns-testing/candid/nns-genesis-token.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/nns/gtc/canister/gtc.did
genesis-token canister id on network 'local' is renrk-eyaaa-aaaaa-aaada-cai
Importing canister 'governance' as 'nns-governance'
Importing /Users/moritz/projects/sns-testing/candid/nns-governance.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/nns/governance/canister/governance.did
governance canister id on network 'local' is rrkah-fqaaa-aaaaa-aaaaq-cai
Importing canister 'ledger' as 'nns-ledger'
Importing /Users/moritz/projects/sns-testing/candid/nns-ledger.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/rosetta-api/icp_ledger/ledger.did
ledger canister id on network 'local' is ryjl3-tyaaa-aaaaa-aaaba-cai
Importing canister 'lifeline' as 'nns-lifeline'
Importing /Users/moritz/projects/sns-testing/candid/nns-lifeline.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/nns/handlers/lifeline/impl/lifeline.did
lifeline canister id on network 'local' is rno2w-sqaaa-aaaaa-aaacq-cai
Importing canister 'registry' as 'nns-registry'
Importing /Users/moritz/projects/sns-testing/candid/nns-registry.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/registry/canister/canister/registry.did
registry canister id on network 'local' is rwlgt-iiaaa-aaaaa-aaaaa-cai
Importing canister 'root' as 'nns-root'
Importing /Users/moritz/projects/sns-testing/candid/nns-root.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/nns/handlers/root/impl/canister/root.did
root canister id on network 'local' is r7inp-6aaaa-aaaaa-aaabq-cai
Importing canister 'sns-wasm' as 'nns-sns-wasm'
Importing /Users/moritz/projects/sns-testing/candid/nns-sns-wasm.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/nns/sns-wasm/canister/sns-wasm.did
sns-wasm canister id on network 'local' is qaa6y-5yaaa-aaaaa-aaafa-cai
nns-registry canister id on network 'local' is rwlgt-iiaaa-aaaaa-aaaaa-cai
nns-governance canister id on network 'local' is rrkah-fqaaa-aaaaa-aaaaq-cai
nns-ledger canister id on network 'local' is ryjl3-tyaaa-aaaaa-aaaba-cai
nns-root canister id on network 'local' is r7inp-6aaaa-aaaaa-aaabq-cai
nns-cycles-minting canister id on network 'local' is rkp4c-7iaaa-aaaaa-aaaca-cai
nns-lifeline canister id on network 'local' is rno2w-sqaaa-aaaaa-aaacq-cai
nns-genesis-token canister id on network 'local' is renrk-eyaaa-aaaaa-aaada-cai
nns-identity has no local canister ID.
nns-ui has no local canister ID.
nns-sns-wasm canister id on network 'local' is qaa6y-5yaaa-aaaaa-aaafa-cai
nns-ic-ckbtc-minter has no local canister ID.
Importing all canisters from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/sns/cli/dfx.json
Importing canister 'sns_governance' as 'sns_governance'
Importing /Users/moritz/projects/sns-testing/candid/sns_governance.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/sns/governance/canister/governance.did
sns_governance has no canister id for network 'ic'
Importing canister 'sns_index' as 'sns_index'
Importing /Users/moritz/projects/sns-testing/candid/sns_index.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/rosetta-api/icrc1/index/index.did
sns_index has no canister id for network 'ic'
Importing canister 'sns_ledger' as 'sns_ledger'
Importing /Users/moritz/projects/sns-testing/candid/sns_ledger.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/rosetta-api/icrc1/ledger/ledger.did
sns_ledger has no canister id for network 'ic'
Importing canister 'sns_root' as 'sns_root'
Importing /Users/moritz/projects/sns-testing/candid/sns_root.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/sns/root/canister/root.did
sns_root has no canister id for network 'ic'
Importing canister 'sns_swap' as 'sns_swap'
Importing /Users/moritz/projects/sns-testing/candid/sns_swap.did from https://raw.githubusercontent.com/dfinity/ic/fda260e972c03a580be1119d6c2868e30171be02/rs/sns/swap/canister/swap.did
sns_swap has no canister id for network 'ic'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 25845  100 25845    0     0   191k      0 --:--:-- --:--:-- --:--:--  203k
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 17373  100 17373    0     0   136k      0 --:--:-- --:--:-- --:--:--  143k
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  144k    0  144k    0     0   308k      0 --:--:-- --:--:-- --:--:--  310k
Loaded configuration.
Sending proposal with title "NNS Proposal to create an SNS named 'Rock Out'" to NNS (--network=local)...
Invoking dfx with `dfx`. dfx version: dfx 0.19.0
default
Imported identity: "test-neuron-1-owner__b2ucp-4x6ou-zvxwi-niymn-pvllt-rdxqr-wi4zj-jat5l-ijt2s-vv4f5-4ae".
Using identity: "test-neuron-1-owner__b2ucp-4x6ou-zvxwi-niymn-pvllt-rdxqr-wi4zj-jat5l-ijt2s-vv4f5-4ae".

🚀 Success!
Message from NNS governance: "The proposal has been created successfully."
Proposal ID: 10
Using identity: "default".
Using identity: "default".
br5f7-7uaaa-aaaaa-qaaca-cai
by6od-j4aaa-aaaaa-qaadq-cai
bw4dl-smaaa-aaaaa-qaacq-cai
be2us-64aaa-aaaaa-qaabq-cai
b77ix-eeaaa-aaaaa-qaada-cai
Using identity: "default".
OK
Using identity: "default".
OK
Using identity: "default".
Using identity: "default".
Building canisters...
Error: Failed while trying to build all canisters.
Caused by: Failed while trying to build all canisters.
  Failed while trying to build all canisters in the canister pool.
    The pre-build all step failed with an embedded error: Failed step_prebuild_all.: Failed to copy /Users/moritz/projects/sns-testing/ to /Users/moritz/projects/sns-testing/.dfx/local/canisters/idl/qhbym-qaaaa-aaaaa-aaafq-cai.did: the source path is neither a regular file nor a symlink to a regular file

[anchpop]

Thanks for reporting this. You should be able to work around this by running ./cleanup.sh, or by starting over with a fresh copy of sns-testing. I'll leave this issue open until the root cause is actually identified and fixed

[anchpop]

Note: I think the issue is related to a thing that happens where some of dfx.json's candid fields get set to candid: "". It just happened to me multiple times in a row, super weird. I'll post in here if/when I have an update