Golang cmd/cgo/internal/testsanitizers: TestLSAN/lsan1 failures

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test == "TestLSAN/lsan1"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestLSAN/lsan1
=== PAUSE TestLSAN/lsan1
=== CONT  TestLSAN/lsan1
    lsan_test.go:64: output does not contain expected leak error "detected memory leaks"
--- FAIL: TestLSAN/lsan1 (1.79s)

— watchflakes

Comment From: gopherbot

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/cgo/internal/testsanitizers" && test == "TestLSAN/lsan1"

2025-06-09 17:55 go1.25-linux-ppc64le_power9 release-branch.go1.25@049a5e60 cmd/cgo/internal/testsanitizers.TestLSAN/lsan1 (log)

=== RUN TestLSAN/lsan1 === PAUSE TestLSAN/lsan1 === CONT TestLSAN/lsan1 lsan_test.go:64: output does not contain expected leak error "detected memory leaks" --- FAIL: TestLSAN/lsan1 (1.79s)

— watchflakes