Internal compiler error in src/compiler.js

[goldwaving]

Emscripten v3.1.44 on Windows 11.

Internal compiler error in src/compiler.js!
Please create a bug report at https://github.com/emscripten-core/emscripten/issues/
with a log of the build and the input files used to run. Exception message: "TypeError: sig.slice(...).replace is not a function
   at addFromLibrary (C:\Develop\emsdk-main\upstream\emscripten\src\jsifier.js:528:57)
   at symbolHandler (C:\Develop\emsdk-main\upstream\emscripten\src\jsifier.js:554:16)
   at symbolHandler (C:\Develop\emsdk-main\upstream\emscripten\src\jsifier.js:554:16)
   at Object.<anonymous> (C:\Develop\emsdk-main\upstream\emscripten\src\compiler.js:102:3
   at Module._compile (node:internal/modules/cjs/loader:1196:14)
   at Object.Module._extensions..js (node:internal/modules/cjs/loader:1250:10)
   at Object.Module._extensions..js (node:internal/modules/cjs/loader:1250:10)
   at Function.Module._load (node:internal/modules/cjs/loader:909:12)
   at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
   at node:internal/main/run_main_module:22:47

Maybe check length of sig is greater than 1 character?

[sbc100]

Hmm.. but sig.slice(1) should always return a string even if sig is the empty string.

> ''.slice(1).replace(/j/g, 'ii')
''

Which leads me to believe that perhaps sig is perhaps some other type? Can add console.log(sig) and console.log(typeof sig) return before line 528 of jsifier.js?

[sbc100]

Are you passing your own JS library files? (i.e. are you using --js-library?). Can you share your full link command?

[goldwaving]

Good catch. Turns out that one of my sigs was ['iiii'] instead of just 'iiii'. Perhaps there could be a check that sig is a string somewhere to avoid this kind of a compiler error.

[sbc100]

Sounds like a good idea.