runtime:racebench: BenchmarkAlignedLoad failures

[gopherbot]

#!watchflakes
default <- pkg == "runtime:racebench" && test == "BenchmarkAlignedLoad"

Issue created automatically to collect these failures.

Example (log):

=== RUN   BenchmarkAlignedLoad
BenchmarkAlignedLoad
BenchmarkAlignedLoad-4                        	13270321	         8.888 ns/op

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime:racebench" && test == "BenchmarkAlignedLoad"

2025-08-08 02:04 gotip-darwin-amd64-race go@ee7bb896 runtime:racebench.BenchmarkAlignedLoad [SKIP] (log)

=== RUN   BenchmarkAlignedLoad
BenchmarkAlignedLoad
BenchmarkAlignedLoad-4                        	13270321	         8.888 ns/op

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime:racebench" && test == "BenchmarkAlignedLoad"

2025-08-08 17:48 gotip-darwin-arm64-race go@dcc77f9e runtime:racebench.BenchmarkAlignedLoad [SKIP] (log)

=== RUN   BenchmarkAlignedLoad
BenchmarkAlignedLoad
BenchmarkAlignedLoad-4                        	14180276	         8.121 ns/op

— watchflakes