encoding/json: Extra space in Decoder.Token SyntaxError messages #26587
Description
Decoder.Token returns SyntaxError with messages containing double spaces after the quoted character (via Decoder.tokenError):
func (dec *Decoder) tokenError(c byte) (Token, error) {
var context string
switch dec.tokenState {
case tokenTopValue:
context = " looking for beginning of value"
case tokenArrayStart, tokenArrayValue, tokenObjectValue:
context = " looking for beginning of value"
case tokenArrayComma:
context = " after array element"
case tokenObjectKey:
context = " looking for beginning of object key string"
case tokenObjectColon:
context = " after object key"
case tokenObjectComma:
context = " after object key:value pair"
}
return nil, &SyntaxError{"invalid character " + quoteChar(c) + " " + context, dec.offset()}
}
I found this when building a test suite under go version go1.10 darwin/amd64, but it is still an issue as per current HEAD of the master branch: https://github.com/golang/go/blob/master/src/encoding/json/stream.go#L474
I intend to contribute a patch, this issue is mainly to serve as reference and avoid duplication of effort (however small it may be).