Got: Error in string: string() got unexpected keyword argument 'allow_multiple'

[dzdeping]

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Add below ctx in my.bzl file

ModuleProvider = provider(fields = ['type'])
modules = ["","","",""]
def _custom_impl(ctx):
    raw_modules = ctx.build_setting_vaule
    if raw_modules not in modules:
       fail(str(ctx.label) + "build setting allowed to take value {" + ",".join(modules) + "} but was set to unallowed value " + raw_modules)
    return ModuleProvider(Type = raw_modules)

module_flag = rule(
    implementation = _custom_impl,
    build_setting = config.string(flag = True, allow_multiple = True)
)

What operating system are you running Bazel on?

Ubuntu 18.04.2 LTS \n \l

What's the output of bazel info release?

release 4.0.0

Any other information, logs, or outputs that you want to share?

when i run : bazel coverage //...

i got:

ERROR: Traceback (most recent call last): File "/opt/code/bepcloudbazel/bepcloud/bepcloud-parent/bzl/pkg_war.bzl", line 167, column 34, in <toplevel> build_setting = config.string(flag = True, allow_multiple = True) Error in string: string() got unexpected keyword argument 'allow_multiple'

[brandjon]

Bazel 4.0.0's baseline was cut on Nov 18. The allow_multiple parameter to config.string() was added on Dec 10. You can use a version of Bazel closer to head if you want to experiment with this feature.