INIParseError if separators (i.e. [ and ]) are used in values

[snorwin]

Confirm by changing [ ] to [x] below to ensure that it's a bug:

• I've gone though Developer Guide and API reference
• I've checked AWS Forums and StackOverflow for answers
• I've searched for previous similar issues and didn't find any solution

Describe the bug
A clear and concise description of what the bug is.

Version of AWS SDK for Go?
main branch

Version of Go (go version)?
1.6

To Reproduce (observed behavior)

[bar]
foo = ]v]a[l][id

INIParseError: invalid state with ASTKind  and TokenType sep

or

[bar]
foo = v]al[id

INIParseError: expected '['

Expected behavior
Should parse the values which contain separators.

[skmcgrail]

@snorwin I know the the AWS CLI allows for these tokens to be present in values. Out of curiosity is there a specific use case that you have that requires support for these tokens in the Go INI config parser, or was this just uncovered while testing the parser with various input?

[snorwin]

@skmcgrail the use case is that a dynamic random credential file was generated for a S3 compatible storage by using Go INI and the issue appeared in the velero-plugin-for-aws which uses the AWS SDK to handle S3 connections.

[github-actions]

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