doc command on a module importing std/jsffi and using a module config file (<modulename>.nims) causes error

[quantimnot]

Description

Running doc command on a module importing std/jsffi and using a module config file (<modulename>.nims) causes error.

Failing Examples

module.nim

discard """
matrix: "--backend:js doc"
"""
import std/jsffi

module.nims

# empty

Error

lib/system/jssys.nim(54, 1) Error: redefinition of 'getCurrentException'; previous declaration here: lib/system.nim(2430, 8)

---

module.nim

discard """
matrix: "doc"
"""
import std/jsffi

module.nims

--backend:js

Error

lib/system/jssys.nim(54, 1) Error: redefinition of 'getCurrentException'; previous declaration here: lib/system.nim(2430, 8)

Passing Examples

module.nim

discard """
matrix: "--backend:js doc"
"""
import std/jsffi

module.nims

Nim Version

1.6.10

```nim --version
Nim Compiler Version 1.6.10 [MacOSX: amd64]
Compiled at 2023-02-12
Copyright (c) 2006-2021 by Andreas Rumpf

active boot switches: -d:release
```

1.9.1-642136ec4f2cd93cdd753bf16fa4aec89b8fee82

```nim --version
Nim Compiler Version 1.9.1 [MacOSX: arm64]
Compiled at 2023-02-09
Copyright (c) 2006-2023 by Andreas Rumpf

git hash: 642136ec4f2cd93cdd753bf16fa4aec89b8fee82
active boot switches: -d:release -d:nimUseLinenoise
```

Current Output

No response

Expected Output

No response

Possible Solution

No response

Additional Information

No response

[metagn]

Fix might be to change defined(js) to defined(js) and not defined(nimscript) here:

Nim/lib/system.nim

Lines 2219 to 2221 in 6fea221

	when defined(js):
	include "system/jssys"
	include "system/reprjs"

Not defining js in nimscript is an option but I don't think there's any other way to tell if the current build is for javascript in a nimscript config file.