go/parser: panic during object resolution: identifier already declared #64534
Description
Discovered via Google internal bug reporting, and reproduced via fuzzing.
The following code panics in object resolution:
_, err := parser.ParseFile(token.NewFileSet(), "", "package p; func _[A\x9d(B](){}", 0)
Output:
panic: 1:22: identifier B already declared or resolved [recovered]
panic: 1:22: identifier B already declared or resolved
https://go.dev/play/p/SacseHmo6ha?v=gotip
This is a new regression, and does not reproduce at 1.21. Marking as a release blocker.
The only thing that changed is https://go.dev/cl/538858, though I don't immediately see the bug.
Metadata
Metadata
Assignees
Type
Projects
Status