const beavior when erroring to set a module

[luislobo]

• Version: v8.7.0
• Platform: Linux nbk-lobo 4.10.0-37-generic Add a Gitter chat badge to README.md #41-Ubuntu SMP Fri Oct 6 20:20:37 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
• Subsystem: repl

I normally use the repl, to test out modules before actually using them.

Today I run into an issue that I don't really know if it's an issue or a "feature".

node                                                                                                                                                                                                                                                                                                                       ⬡ 8.7.0 ◇ 5.5.1  [±PETRO-797-guidon-export ●]
> const m = require('invalid-module-name-goes-here')
Error: Cannot find module 'invalid-module-name-goes-here'
    at Function.Module._resolveFilename (module.js:527:15)
    at Function.Module._load (module.js:476:23)
    at Module.require (module.js:568:17)
    at require (internal/module.js:11:18)
    at repl:1:11
    at ContextifyScript.Script.runInThisContext (vm.js:50:33)
    at REPLServer.defaultEval (repl.js:239:29)
    at bound (domain.js:301:14)
    at REPLServer.runBound [as eval] (domain.js:314:12)
    at REPLServer.onLine (repl.js:440:10)
> const m = require('invalid-module-name-goes-here')
SyntaxError: Identifier 'm' has already been declared

> m
ReferenceError: m is not defined
    at repl:1:1
    at ContextifyScript.Script.runInThisContext (vm.js:50:33)
    at REPLServer.defaultEval (repl.js:239:29)
    at bound (domain.js:301:14)
    at REPLServer.runBound [as eval] (domain.js:314:12)
    at REPLServer.onLine (repl.js:440:10)
    at emitOne (events.js:120:20)
    at REPLServer.emit (events.js:210:7)
    at REPLServer.Interface._onLine (readline.js:282:10)
    at REPLServer.Interface._line (readline.js:631:8)
> 
(To exit, press ^C again or type .exit)
> 

So, basically, you require a non existent module, assigning it to a const identifier. Then, when you try to redefine it (may be typing the correct module name, it doesn't matter much) it says it has been already declared, but after inspecting it, it says it's not defined.

So, weather the last reference error is wrong, saying it's not defined. Or may be there is a slight difference between defined and declared?

[Ginden]

Duplicate: #8441 #8376 #8309

[bnoordhuis]

@Ginden beat me to it. :-) Closing, known issue; please see the other bug reports.