feat: add updated fuzzer from tact-check repository

[Mell0r]

No description provided.

[Mell0r]

Right now there is the problem in one of the tests in the fuzzer - compilation.spec.ts:
Error from the compilator: [INTERNAL COMPILER ERROR]: Interval [0, 0[ is empty or out of source bounds (0)
Stacktrace:
at throwInternalCompilerError (src/error/errors.ts:98:11)
at show (src/grammar/src-info.ts:185:39)
at Object.show [as toString] (src/grammar/src-info.ts:227:29)
at Object.toString [as getLineAndColumnMessage] (src/grammar/src-info.ts:258:35)
at getLineAndColumnMessage (src/error/errors.ts:111:62)
at throwNonFatalErrorConstEval (src/optimizer/interpreter.ts:60:24)
at Interpreter.throwNonFatalErrorConstEval [as interpretStaticCall] (src/optimizer/interpreter.ts:1562:21)
at Interpreter.interpretStaticCall [as interpretExpressionInternal] (src/optimizer/interpreter.ts:924:29)
at interpretExpressionInternal (src/optimizer/interpreter.ts:770:18)
at Interpreter.code [as handleStackOverflow] (src/optimizer/interpreter.ts:1933:20)
at Interpreter.handleStackOverflow (src/optimizer/interpreter.ts:769:21)
at interpretExpression (src/optimizer/constEval.ts:221:32)
at writeExpression (src/generator/writers/writeExpression.ts:181:45)
at writeStatement (src/generator/writers/writeFunction.ts:186:40)
at writeReceiverBody (src/generator/writers/writeRouter.ts:502:23)
at writeReceiverBody (src/generator/writers/writeRouter.ts:492:9)
at Writer.handler [as inIndent] (src/utils/Writer.ts:9:9)
at Writer.inIndent [as inBlock] (src/utils/Writer.ts:15:14)
at WriterContext.inBlock (src/generator/Writer.ts:303:30)
at inBlock (src/generator/writers/writeRouter.ts:475:10)
at writeBouncedReceiver (src/generator/writers/writeRouter.ts:427:13)
at Array.forEach ()
at forEach (src/generator/writers/writeRouter.ts:426:33)
at Writer.handler [as inIndent] (src/utils/Writer.ts:9:9)
at Writer.inIndent [as inBlock] (src/utils/Writer.ts:15:14)
at WriterContext.inBlock (src/generator/Writer.ts:303:30)
at inBlock (src/generator/writers/writeRouter.ts:419:10)
at src/generator/writers/writeContract.ts:422:35
at Writer.handler [as inIndent] (src/utils/Writer.ts:9:9)
at Writer.inIndent [as inBlock] (src/utils/Writer.ts:15:14)
at WriterContext.inBlock (src/generator/Writer.ts:303:30)
at inBlock (src/generator/writers/writeContract.ts:404:14)
at handler (src/generator/Writer.ts:246:17)
at WriterContext.handler [as body] (src/generator/Writer.ts:236:9)
at body (src/generator/Writer.ts:245:18)
at WriterContext.handler [as fun] (src/generator/Writer.ts:187:9)
at WriterContext.fun [as main] (src/generator/Writer.ts:244:14)
at main (src/generator/writers/writeContract.ts:347:10)
at writeAll (src/generator/writeProgram.ts:437:22)
at writeAll (src/generator/writeProgram.ts:55:5) <--- first function called outside of the fuzzer and inside the compilator
at compile (fuzzer/test/testUtils.ts:62:20)
at fuzzer/test/compilation.spec.ts:47:21
at withNodeFS (fuzzer/src/util.ts:28:9)
at compileProgram (fuzzer/test/compilation.spec.ts:30:5)
at AsyncProperty.run (node_modules/fast-check/lib/check/property/AsyncProperty.generic.js:49:28)
at asyncRunIt (node_modules/fast-check/lib/check/runner/Runner.js:37:21)
at checkAsyncProperty (fuzzer/src/util.ts:100:5)
at compileAndCheckProperty (fuzzer/test/compilation.spec.ts:111:17)
at fuzzer/test/compilation.spec.ts:121:25
at async Promise.all (index 81)

As i understand, the problem is with provioding loc to all the AST items. Before the last commit i used dummySrcInfo from compilator code for all 'loc' fields, and now i tried to replace it with my own dummySrcInfoPrintable (./fuzzer/src/utils.ts, 236 line) with non-empty line interval, but error still persists. As i doesn't provide a source code and compile ast tree directly, in the place of the error (./src/grammar/src-info.ts, 186 line) the 'str' - source code itself - is empty, so the interval is empty too. But how can it not be?

[jeshecdom]

Hello. Try to define your dummySrcInfoPrintable like this:

const dummySrcInfoPrintable = getSrcInfo(" ", 0, 0, null, "user");

Note that the first parameter to getSrcInfo is not an empty string, but has a single space character (you could add as many space characters as you like). The error is caused because using an empty string as first parameter to getSrcInfo produces invalid limits in the second and third parameters: an empty string does not have a 0th character.