Golang cmd/link: TestDWARFiOS/c-archive/testprog failures

#!watchflakes
default <- pkg == "cmd/link" && test == "TestDWARFiOS/c-archive/testprog"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestDWARFiOS/c-archive/testprog
=== PAUSE TestDWARFiOS/c-archive/testprog
=== CONT  TestDWARFiOS/c-archive/testprog
    dwarf_test.go:119: go build -o /Users/swarming/.swarming/w/ir/x/t/TestDWARFiOSc-archivetestprog4142971217/001/testprog.exe ../../runtime/testdata/testprog: exit status 1
        # runtime/testdata/testprog
        /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar failed: exit status 1
        fatal error: /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: can't write to output file (Device error)
        /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar: internal ranlib command failed

--- FAIL: TestDWARFiOS/c-archive/testprog (127.69s)

— watchflakes

Comment From: gopherbot

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/link" && test == "TestDWARFiOS/c-archive/testprog"

2025-08-01 15:57 gotip-darwin-amd64-longtest go@eef5f8d9 cmd/link.TestDWARFiOS/c-archive/testprog (log)

=== RUN TestDWARFiOS/c-archive/testprog === PAUSE TestDWARFiOS/c-archive/testprog === CONT TestDWARFiOS/c-archive/testprog dwarf_test.go:119: go build -o /Users/swarming/.swarming/w/ir/x/t/TestDWARFiOSc-archivetestprog4142971217/001/testprog.exe ../../runtime/testdata/testprog: exit status 1 # runtime/testdata/testprog /Users/swarming/.swarming/w/ir/x/w/goroot/pkg/tool/darwin_amd64/link: running /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar failed: exit status 1 fatal error: /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: can't write to output file (Device error) /Users/swarming/.swarming/w/ir/cache/tools/15e204a/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar: internal ranlib command failed --- FAIL: TestDWARFiOS/c-archive/testprog (127.69s)

— watchflakes