error loading wasm after rust toolchain update compiler

[dzmitry-lahoda]

 RUST_BACKTRACE=1 nix run github:andresilva/polkadot.nix#subwasm --  metadata result/lib/runtime.optimized.wasm  --format scale > out.txt

test.zip

🗣️ If you think it should have worked, please open an issue at https://github.com/chevdor/subwasm/issues
and attach your runtime and mention using subwasmlib v0.20.0
The source was "result/lib/runtime.optimized.wasm" 

[dzmitry-lahoda]

Hash Error
Error: 
   0: Generic error: Failed loading runtime

Location:
   cli/src/main.rs:101

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
                                ⋮ 3 frames hidden ⋮                               
   4: subwasm::main::he999dfba082e9974
      at <unknown source file>:<unknown line>
   5: std::sys_common::backtrace::__rust_begin_short_backtrace::hcdb697a2b8a0db9e
      at <unknown source file>:<unknown line>
   6: std::rt::lang_start::{{closure}}::h97a0e80dd1689db2
      at <unknown source file>:<unknown line>
   7: std::rt::lang_start_internal::h7910e71d80e7bec3
      at <unknown source file>:<unknown line>
   8: main<unknown>
      at <unknown source file>:<unknown line>
   9: __libc_start_call_main<unknown>
      at <unknown source file>:<unknown line>
  10: __libc_start_main_impl<unknown>
      at <unknown source file>:<unknown line>
  11: _start<unknown>
      at <unknown source file>:<unknown line>

Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering.
Run with RUST_BACKTRACE=full to include source snippets.

So is it possible to expand error to full? Whole trace/message of Hash?

[dzmitry-lahoda]

Weird is that how HashError happens? Why hashing fails?

[chevdor]

and attach your runtime

[dzmitry-lahoda]

it is inside archieve. gh does not allow to upload wasm exfensions

[dzmitry-lahoda]

test.zip

[dzmitry-lahoda]

it is unoptimized wasm btw. so optimized fails same way. fails on several new rust versions.

[wilwade]

I also had this issue and it was happening because the start of the wasm was not the WASM Magic bytes.

https://blog.ttulka.com/learning-webassembly-2-wasm-binary-format/

[chevdor]

Closing as it sounds like the wasm was not generated properly. Please reopen if you think this is wrong and include how you built the wasm.