title: signal: killed at the end of function
body: <p>Using go-gin I have this function to receive posted jokes and saved them to database:</p>
  
  <pre><code>func PostJoke(c *gin.Context) {
      var err error
  
      userId, userName, userAvatar := shared.GetUserInfo(c)
  
      if userId == 0 {
          c.JSON(403, gin.H{"error": "not authorized"})
      }
  
      title := c.PostForm("title")
      content := c.PostForm("content")
      nsfwSt := c.PostForm("nsfw")
      nsfw, err := strconv.Atoi(nsfwSt)
      if err != nil {
          log.Panic(err)
          c.JSON(http.StatusInternalServerError, gin.H{"error": "internal server error"})
      }
  
      file, err := c.FormFile("file")
      if err != nil {
          log.Println(err)
          c.String(http.StatusBadRequest, fmt.Sprintf("get form err: %s", err.Error()))
          return
      }
      dir, err := os.Getwd()
      if err != nil {
          log.Fatal(err)
      }
      filename := path.Join(shared.RandString(6) + path.Ext(file.Filename))
      dest := dir + "/media/photos/" + filename
      if err := c.SaveUploadedFile(file, dest); err != nil {
          c.String(http.StatusBadRequest, fmt.Sprintf("upload file err: %s", err.Error()))
          return
      }
      _, err = shared.Dbmap.Exec("INSERT INTO joke (user_id, username, user_avatar, title, content, photo, nsfw) VALUES (?, ?, ?, ?, ?, ?, ?)", userId, userName, userAvatar, title, content, filename, nsfw)
      if err != nil {
          log.Println(err)
          c.JSON(http.StatusInternalServerError, gin.H{"error": "internal server error"})
      }
  
      fmt.Println("end of function")
      c.JSON(http.StatusOK, gin.H{"sccess": "joke is created"})
  
  }
  </code></pre>
  
  <p>The function works as expected: saves the data and returns <code>"sccess": "joke is created"</code>
  However at the end I receive this mysterious error at the terminal:</p>
  
  <pre><code>signal: killed
  </code></pre>
  
  <p>and does not respond anymore. </p>
  
  <p>I'm wondering what can cause this and how to fix it?</p>
  
  <p><strong>UPDATE:</strong> 
  <code>go version go1.8.3 linux/amd64</code></p>
  
  <p>and here is my <code>go env</code>:</p>
  
  <pre><code>me@pc:~$ go env
  GOARCH="amd64"
  GOBIN=""
  GOEXE=""
  GOHOSTARCH="amd64"
  GOHOSTOS="linux"
  GOOS="linux"
  GOPATH="/home/me/go"
  GORACE=""
  GOROOT="/usr/local/go"
  GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
  GCCGO="gccgo"
  CC="gcc"
  GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build842411537=/tmp/go-build -gno-record-gcc-switches"
  CXX="g++"
  CGO_ENABLED="1"
  PKG_CONFIG="pkg-config"
  CGO_CFLAGS="-g -O2"
  CGO_CPPFLAGS=""
  CGO_CXXFLAGS="-g -O2"
  CGO_FFLAGS="-g -O2"
  CGO_LDFLAGS="-g -O2"
  </code></pre>
  
  <p>When I try to rebuild all packages using <code>sudo go install -a
  </code>, I get:</p>
  
  <pre><code>main.go:8:2: cannot find package "github.com/gin-gonic/contrib/sessions" in any of:
      /usr/lib/go-1.6/src/github.com/gin-gonic/contrib/sessions (from $GOROOT)
      ($GOPATH not set)
  main.go:9:2: cannot find package "github.com/gin-gonic/gin" in any of:
      /usr/lib/go-1.6/src/github.com/gin-gonic/gin (from $GOROOT)
      ($GOPATH not set)
  main.go:4:2: cannot find package "proj/controller" in any of:
      /usr/lib/go-1.6/src/proj/controller (from $GOROOT)
      ($GOPATH not set)
  main.go:5:2: cannot find package "proj/middleware" in any of:
      /usr/lib/go-1.6/src/proj/middleware (from $GOROOT)
      ($GOPATH not set)
  </code></pre>