Build scripts are failing

[guy-ingo]

Hi,

I'm trying to build the optimalate and verify (using yarn build:optimalate in the main folder) and I'm get a problem (the example above is for optimalate):

****COMPILING CIRCUIT****
invalid output path
previous errors were found
DONE (0s)
****COMPILING C++ WITNESS GENERATION CODE****
build_optimalate.sh: 30: cd: can't cd to ../../build/optimalate/optimalate_cpp
make: *** No targets specified and no makefile found.  Stop.
DONE (0s)
****VERIFYING WITNESS****
build_optimalate.sh: 37: ./optimalate: not found
DONE (0s)
[ERROR] snarkJS: [Error: ENOENT: no such file or directory, open 'witness.wtns'] {
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: 'witness.wtns'
}

I saw that there's no witness file, so I tried compiling the circuit separately. But then another problem appears when trying to run circom directly (using circom optimalate.circom --O1 --r1cs --sym --c at circom-pairing/scripts/optimalate):

thread 'main' panicked at 'Method call in file type_analysis/src/analyzers/unknown_known_analysis.rs line 216', /home/ubuntu/circom/program_structure/src/utils/environment.rs:192:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Do you know what causes this issue? (I'm using circom 2.0.4. Downgrading it to 2.0.3 did nothing)

[yi-sun]

You may have to create a /build directory at the top level of the repo. Let me know if that resolves the issue.

[guy-ingo]

Didn't work unfortunately, I get the same error that I get when I'm running circom compilation directly using circom optimalate.circom --O1 --r1cs --sym --c:

****COMPILING CIRCUIT****
thread 'main' panicked at 'Method call in file type_analysis/src/analyzers/unknown_known_analysis.rs line 216', /home/ubuntu/circom/program_structure/src/utils/environment.rs:192:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[nalinbhardwaj]

@guy-ingo your new error is due to a circom compiler bug, see iden3/circom#57. For now, I'd recommend rolling back to an old version of circom by running git checkout 47883d9 && cargo build --release && cargo install --path circom in the circom git repo on your local

[Dimo99]

@nalinbhardwaj
I have tried using the iden3/circom#57 patch. But I get the following errors.

******COMPILING CIRCUIT****
error[T20460]: Typing error found
    ┌─ "/home/dimo/code/repos/circom-exercises/circom-pairing/circuits/final_exp.circom":319:20
    │
319 │     component pow2[BITLENGTH]; // pow2[i] = C(in^{2^i})
    │                    ^^^^^^^^^ The length of every array must known during the constraint generation phase**

[nalinbhardwaj]

@Dimo99 Yeah it is intended for the static analysis code iden3 introduced to fail the circuit - I asked about fixing this behaviour in the iden3 Telegram but have yet to hear back about a response/fix (note the iden3/circom#57 patch only fixes the compiler panic, not the actual behaviour). To fix the compilation you should use a version of circom before the static analysis patch applied (by using git checkout 47883d9 && cargo build --release && cargo install --path circom on your circom repo in particular)