Golang cmd/internal/testdir: Test/funcdup.go failures

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/funcdup.go"

Issue created automatically to collect these failures.

Example (log):

=== RUN   Test/funcdup.go
=== PAUSE Test/funcdup.go
=== CONT  Test/funcdup.go
    testdir_test.go:1193: gc output:
    testdir_test.go:147: 
        funcdup.go:10: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:11: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:12: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:15: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:16: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:17: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:21: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:22: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:23: missing error "duplicate argument j|redefinition|previous|redeclared"
        funcdup.go:25: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:26: missing error "duplicate argument i|redefinition|previous|redeclared"
        funcdup.go:27: missing error "duplicate argument i|redefinition|previous|redeclared"

--- FAIL: Test/funcdup.go (0.00s)

— watchflakes

Comment From: gopherbot

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/funcdup.go"

2025-06-09 16:29 go1.25-openbsd-ppc64 release-branch.go1.25@da0e8c45 cmd/internal/testdir.Test/funcdup.go (log)

— watchflakes