solc-js throws an error with just a number; trouble compiling strings.js

[tcoulter]

When you try to compile solidity stringutils's strings.sol, solc-js will throw an error with only a number as its error message. I've created a github project showing how you can reproduce the error, link below. This error was originally posted on Truffle's issue tracker here.

https://github.com/tcoulter/solc-result-bug

$ ./index.js

/Users/tim/Documents/workspace/Consensys/solcbug/node_modules/solc/soljson.js:1 (function (exports, require, module, __filename, __dirname) { var Module;if(!Module)Module=(typeof Module!=="undefined"?Module:null)||{};var moduleOverrides={};for(var key in Module){if(Module.hasOwnProperty(key)){moduleOverrides[key]=Module[key]}}var ENVIRONMENT_IS_WEB=typeof window==="object";var ENVIRONMENT_IS_WORKER=typeof importScripts==="function";var ENVIRONMENT_IS_NODE=typeof process==="object"&&typeof require==="function"&&!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_WORKER;var ENVIRONMENT_IS_SHELL=!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_NODE&&!ENVIRONMENT_IS_WORKER;if(ENVIRONMENT_IS_NODE){if(!Module["print"])Module["print"]=function print(x){process["stdout"].write(x+"\n")};if(!Module["printErr"])Module["printErr"]=function printErr(x){process["stderr"].write(x+"\n")};var nodeFS=require("fs");var nodePath=require("path");Module["read"]=function read(filename,binary){filename=nodePath"normalize";var ret=nodeFS["readFil
6042264

$

[axic]

I think those numeric errors are C++ exceptions not properly handled. Probably it is a memory offset pointer. It is printed by Emscripten and not the console.log lines you have in your demo code.

[tcoulter]

not the console.log lines you have in your demo code

Correct. Those were for me to ensure they were never reached. They can be removed.

[axic]

@tcoulter were you able to somehow reduce string.sol to a smaller instance which still has this problem?

[tcoulter]

Ah, my bad. I didn't try.

[tcoulter]

I can likely give it a shot later today.

[axic]

@tcoulter moved to ethereum/solidity#971 - can you please comment your findings there later?