cmd/compile: "runtime.staticuint64s+62522528 is not 2-byte aligned" error on s390x

[klauspost]

Go version

go1.25.5 windows/amd64

Output of go env in your module/workspace:

λ go env
set AR=ar
set CC=gcc
set CGO_CFLAGS=-O2 -g
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-O2 -g
set CGO_ENABLED=0
set CGO_FFLAGS=-O2 -g
set CGO_LDFLAGS=-O2 -g
set CXX=g++
set GCCGO=gccgo
set GO111MODULE=
set GOARCH=s390x
set GOAUTH=netrc
set GOBIN=
set GOCACHE=e:\temp\gocache
set GOCACHEPROG=
set GODEBUG=
set GOENV=C:\Users\klaus\AppData\Roaming\go\env
set GOEXE=
set GOEXPERIMENT=
set GOFIPS140=off
set GOFLAGS=
set GOGCCFLAGS=-fPIC -m64 -march=z13 -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=d:\temp\wintemp\go-build3566921818=/tmp/go-build -gno-record-gcc-switches
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMOD=d:\temp\repro\iceberg-go\go.mod
set GOMODCACHE=e:\gopath\pkg\mod
set GONOPROXY=github.com/miniohq/,github.com/klauspost/minio-ec
set GONOSUMDB=...
set GOOS=linux
set GOPATH=e:\gopath\
set GOPRIVATE=...
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\Go
set GOSUMDB=sum.golang.org
set GOTELEMETRY=local
set GOTELEMETRYDIR=C:\Users\klaus\AppData\Roaming\go\telemetry
set GOTMPDIR=
set GOTOOLCHAIN=auto
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.25.5
set GOWORK=
set PKG_CONFIG=pkg-config

What did you do?

git clone https://github.com/apache/iceberg-go.git
cd iceberg-go
GOOS=linux GOARCH=s390x go build ./...

What did you see happen?

# github.com/apache/iceberg-go/cmd/iceberg
github.com/apache/iceberg-go.getComparator[go.shape.bool]: runtime.staticuint64s+62522528 is not 2-byte aligned
github.com/apache/iceberg-go.getComparator[go.shape.bool]: runtime.staticuint64s+62522528 is not 2-byte aligned
github.com/apache/iceberg-go/table/internal.newStatAgg[go.shape.bool]: runtime.staticuint64s+62522528 is not 2-byte aligned
github.com/apache/iceberg-go/table/internal.newStatAgg[go.shape.bool]: runtime.staticuint64s+62522528 is not 2-byte aligned

What did you expect to see?

(successful compile)