Stack too deep to compile error.

[yuliyu123]

❯ forge build                                   
[⠢] Compiling...
[⠆] Compiling 21 files with 0.8.13
[⠔] Solc finished in 1.07s
Error: 
   0: Compiler run failed
      CompilerError: Stack too deep when compiling inline assembly: Variable pos is 3 slot(s) too deep inside the stack.

how I can solve this problem with forge?

[onbjerg]

It greatly depends on your optimizer settings and what you're doing - the error is from the Solidity compiler. Try --via-ir or upping the number of optimizer runs.

[yuliyu123]

hi, it passed with --via-ir, thanks so much.