cmd/internal/testdir: Test/fixedbugs/issue68525.go failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/fixedbugs/issue68525.go"

Issue created automatically to collect these failures.

Example (log):

=== RUN   Test/fixedbugs/issue68525.go
=== PAUSE Test/fixedbugs/issue68525.go
=== CONT  Test/fixedbugs/issue68525.go
    testdir_test.go:147: exit status 1
        # command-line-arguments
        callRet: nosplit stack over 800 byte limit
        callRet<26>
            grows 72 bytes, calls runtime.reflectcallmove<0>
                grows 72 bytes, calls runtime.reflectcallmove<1>
                    grows 72 bytes, calls runtime.bulkBarrierPreWrite<1>
...
                                                grows 56 bytes, calls runtime.asmcgocall<1>
                                                    grows 32 bytes, calls gosave_systemstack_switch<26>
                                                        grows 0 bytes, calls runtime.abort<0>
                                                        8 bytes over limit
                                                    grows 32 bytes, calls runtime.save_g<0>
                                                    8 bytes over limit
                                                    grows 32 bytes, calls runtime.save_g<0>
                                                    8 bytes over limit
        
--- FAIL: Test/fixedbugs/issue68525.go (43.46s)

— watchflakes