Yul compilation failed: DeclarationError: Function not found.

[agroce]

Compiling this file:

contract o:
 def __init__(l:string0,e:string0):y:u256

thread 'main' panicked at 'Yul compilation failed: {"errors":[{"component":"general","formattedMessage":"DeclarationError: Function not found.\n --> input.yul:1:355:\n  |\n1 |  ... _string0_mem(params_start_mem, 0), abi_decode_string0_mem(params_start_mem, 32)) function co ...\n  |                                         ^^^^^^^^^^^^^^^^^^^^^^\n\n","message":"Function not found.","severity":"error","sourceLocation":{"end":376,"file":"input.yul","start":354},"type":"DeclarationError"},{"component":"general","formattedMessage":"TypeError: Expected expression to evaluate to one value, but got 0 values instead.\n --> input.yul:1:355:\n  |\n1 |  ... _string0_mem(params_start_mem, 0), abi_decode_string0_mem(params_start_mem, 32)) function contract_create2(data_pt ...\n  |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n","message":"Expected expression to evaluate to one value, but got 0 values instead.","severity":"error","sourceLocation":{"end":398,"file":"input.yul","start":354},"type":"TypeError"},{"component":"general","formattedMessage":"DeclarationError: Function not found.\n --> input.yul:1:310:\n  |\n1 |  ... $l, $e) { let $y := 0 } $$__init__(abi_decode_string0_mem(params_start_mem, 0), abi_decode_s ...\n  |                                         ^^^^^^^^^^^^^^^^^^^^^^\n\n","message":"Function not found.","severity":"error","sourceLocation":{"end":331,"file":"input.yul","start":309},"type":"DeclarationError"},{"component":"general","formattedMessage":"TypeError: Expected expression to evaluate to one value, but got 0 values instead.\n --> input.yul:1:310:\n  |\n1 |  ... $l, $e) { let $y := 0 } $$__init__(abi_decode_string0_mem(params_start_mem, 0), abi_decode_string0_mem(params_sta ...\n  |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n\n","message":"Expected expression to evaluate to one value, but got 0 values instead.","severity":"error","sourceLocation":{"end":352,"file":"input.yul","start":309},"type":"TypeError"}]}', compiler/src/lib.rs:56:27
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

You've hit an internal compiler error. This is a bug in the Fe compiler.
Fe is still under heavy development, and isn't yet ready for production use.

If you would, please report this bug at the following URL:
  https://github.com/ethereum/fe/issues/new
Aborted

On latest github master, built with

[profile.dev]
debug = true
panic = "abort"

for fuzzing. Using https://github.com/agroce/afl-compiler-fuzzer

[g-r-a-n-t]

original file fails to parse, but this one still panics

contract o:
 def __init__(l: string0, e: string0):
  y: u256

[g-r-a-n-t]

Looks like this is happening because the __init__ function is not pub and therefore the functions required for decoding the input are not added to the runtime.

Simple fix is to error if the __init__ function is not pub, which I'm surprised we're not already doing.