What version of Go are you using (go version)?

$ go version
go version go1.14.1 linux/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="0"
GOMOD="/test/go.mod"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build760461752=/tmp/go-build -gno-record-gcc-switches"

What did you do?

I try to load package examples. In 1.13 I get the right example, in 1.14 I get the entire file and replaces the example code with func main() { ... }.
Look at pkg.go.dev or go doc examples.

What did you expect to see?

What was shown in go 1.13 - only the example code.

What did you see instead?

The entire test file with the example code replaced with func main() { ... }.

More details

The code below behaves differently in 1.13 and 1.14:

package main

import (
	"fmt"
	"go/doc"
	"os"

	"golang.org/x/tools/go/packages"
)

func main() {
	cfg := &packages.Config{Mode:  packages.LoadAllSyntax, Tests: true}
	pkgs, err := packages.Load(cfg, "github.com/posener/fuzzing")
	if err != nil {
		os.Exit(1)
	}
	if packages.PrintErrors(pkgs) > 0 {
		os.Exit(1)
	}

	for _, pkg := range pkgs {
		fmt.Println(pkg.Name)
		examples := doc.Examples(pkg.Syntax...)
		if len(examples) > 0 {
			fmt.Println(examples[0].Play)
		}
	}
}

In 1.13 fmt.Println(examples[0].Play) prints nil for the fuzzing package, though in 1.14 it prints non-nil object. This breaks what gddo expects in https://github.com/golang/gddo/blob/master/doc/builder.go#L233. I think.