Multi-span messages are not matched

[pczarn]

When multi-span messages are emitted, the compiler duplicates the message in the JSON output for each span. Compiletest recognizes the first message, and reports mismatch for the rest.

[laumann]

Sorry for the late reply. Is this also an issue in rustc's compiletest?

[pczarn]

Yes, the rustc issue is rust-lang/rust#31380