Missing line numbers in cabal.project parse failure errors

[9999years]

Describe the bug
If a source-repository-package is missing its type field, the error message doesn't report a line number.

To Reproduce
Steps to reproduce the behavior:

$ cd $(mktemp -d)
$ echo > cabal.project
$ echo >> cabal.project
$ echo source-repository-package >> cabal.project
$ cabal build
Error: [Cabal-7090]
Error parsing project file /my-project/cabal.project:
???:0:0: "type" field missing

Expected behavior
The error message should show the line number containing the error.

System information

• Operating system: macOS 15.1.1 (24B91)
• Cabal: 3.12.1.0

Additional context
The error message is the same on the latest master commit (55ccc0a).

[9999years]

The error comes from here:

cabal/Cabal-syntax/src/Distribution/FieldGrammar/Parsec.hs

Lines 162 to 163 in 55ccc0a

	Nothing -> parseFatalFailure zeroPos $ show fn ++ " field missing"
	Just [] -> parseFatalFailure zeroPos $ show fn ++ " field missing"

The class has no way to include a line number, so it just gets dropped...

[ulysses4ever]

I first hoped that #8889 could fix it but given the source of the issue above, that looks unlikely :'-(