better error logging, fix parent field checking in image update

go.mod

@@ -5,7 +5,7 @@ go 1.16
 require (
 	github.com/bwmarrin/snowflake v0.3.0
 	github.com/fsnotify/fsnotify v1.4.9
-	github.com/gin-gonic/gin v1.7.2
+	github.com/gin-gonic/gin v1.7.4
 	github.com/gopherjs/gopherjs v0.0.0-20210901121439-eee08aaf2717
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
 	github.com/sirupsen/logrus v1.8.1

go.sum

@@ -50,6 +50,8 @@ github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm
 github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
 github.com/gin-gonic/gin v1.7.2 h1:Tg03T9yM2xa8j6I3Z3oqLaQRSmKvxPd6g/2HJ6zICFA=
 github.com/gin-gonic/gin v1.7.2/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjXkfUtY=
+github.com/gin-gonic/gin v1.7.4 h1:QmUZXrvJ9qZ3GfWvQ+2wnW/1ePrTEJqPKMYEU3lD/DM=
+github.com/gin-gonic/gin v1.7.4/go.mod h1:jD2toBW3GZUr5UMcdrwQA10I7RuaFOl/SGeDjXkfUtY=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=

recover.go

@@ -4,6 +4,7 @@ import (
 	"github.com/gin-gonic/gin"
 	log "github.com/sirupsen/logrus"
 	"net/http"
+	"runtime/debug"
 )
 
 func recovery() gin.HandlerFunc {
@@ -13,8 +14,9 @@ func recovery() gin.HandlerFunc {
 			if p != nil {
 				log.Errorf("Panic occurred in web server, %s", p)
 				context.JSON(http.StatusInternalServerError, gin.H{
-					"error": p,
+					"error": "panic",
 				})
+				log.Error(string(debug.Stack()))
 			}
 		}()
 		context.Next()

store/image.go

@@ -310,7 +310,7 @@ func (s *Store) ImageUpdate(hash, source, parent, commentary, commentaryTranslat
 		info.Source = source
 		msg += "source"
 	}
-	if parent != "\000" {
+	if parent != "\000" && parent != "" {
 		if p := s.ImageSnowflake(parent); p.Snowflake == parent {
 			s.getLock(p.Hash).Lock()
 			defer s.getLock(p.Hash).Unlock()