diff --git a/src/hmnurl/hmnurl.go b/src/hmnurl/hmnurl.go
index 143e5421..ced295c9 100644
--- a/src/hmnurl/hmnurl.go
+++ b/src/hmnurl/hmnurl.go
@@ -20,6 +20,7 @@ type Q struct {
 
 var baseUrlParsed url.URL
 var cacheBust string
+var isTest bool
 
 func init() {
 	SetGlobalBaseUrl(config.Config.BaseUrl)
diff --git a/src/hmnurl/hmnurl_test.go b/src/hmnurl/hmnurl_test.go
index 2d756d7b..bd333fc3 100644
--- a/src/hmnurl/hmnurl_test.go
+++ b/src/hmnurl/hmnurl_test.go
@@ -14,6 +14,7 @@ func TestUrl(t *testing.T) {
 		SetGlobalBaseUrl(config.Config.BaseUrl)
 	}()
 	SetGlobalBaseUrl("http://handmade.test")
+	isTest = true
 
 	t.Run("no query", func(t *testing.T) {
 		result := Url("/test/foo", nil)
diff --git a/src/hmnurl/urls.go b/src/hmnurl/urls.go
index 1c0d2756..8a253ba3 100644
--- a/src/hmnurl/urls.go
+++ b/src/hmnurl/urls.go
@@ -7,6 +7,7 @@ import (
 	"strconv"
 	"strings"
 
+	"git.handmade.network/hmn/hmn/src/logging"
 	"git.handmade.network/hmn/hmn/src/oops"
 )
 
@@ -24,36 +25,42 @@ func BuildHomepage() string {
 }
 
 func BuildProjectHomepage(projectSlug string) string {
+	defer CatchPanic()
 	return ProjectUrl("/", nil, projectSlug)
 }
 
 var RegexProjectIndex = regexp.MustCompile("^/projects$")
 
 func BuildProjectIndex() string {
+	defer CatchPanic()
 	return Url("/projects", nil)
 }
 
 var RegexShowcase = regexp.MustCompile("^/showcase$")
 
 func BuildShowcase() string {
+	defer CatchPanic()
 	return Url("/showcase", nil)
 }
 
 var RegexStreams = regexp.MustCompile("^/streams$")
 
 func BuildStreams() string {
+	defer CatchPanic()
 	return Url("/streams", nil)
 }
 
 var RegexSiteMap = regexp.MustCompile("^/sitemap$")
 
 func BuildSiteMap() string {
+	defer CatchPanic()
 	return Url("/sitemap", nil)
 }
 
 var RegexAtomFeed = regexp.MustCompile("^/atom$")
 
 func BuildAtomFeed() string {
+	defer CatchPanic()
 	return Url("/atom", nil)
 }
 
@@ -62,18 +69,21 @@ func BuildAtomFeed() string {
 var RegexLoginAction = regexp.MustCompile("^/login$")
 
 func BuildLoginAction(redirectTo string) string {
+	defer CatchPanic()
 	return Url("/login", []Q{{Name: "redirect", Value: redirectTo}})
 }
 
 var RegexLoginPage = regexp.MustCompile("^/_login$")
 
 func BuildLoginPage(redirectTo string) string {
+	defer CatchPanic()
 	return Url("/_login", []Q{{Name: "redirect", Value: redirectTo}})
 }
 
 var RegexLogoutAction = regexp.MustCompile("^/logout$")
 
 func BuildLogoutAction() string {
+	defer CatchPanic()
 	return Url("/logout", nil)
 }
 
@@ -84,42 +94,49 @@ func BuildLogoutAction() string {
 var RegexManifesto = regexp.MustCompile("^/manifesto$")
 
 func BuildManifesto() string {
+	defer CatchPanic()
 	return Url("/manifesto", nil)
 }
 
 var RegexAbout = regexp.MustCompile("^/about$")
 
 func BuildAbout() string {
+	defer CatchPanic()
 	return Url("/about", nil)
 }
 
 var RegexCodeOfConduct = regexp.MustCompile("^/code-of-conduct$")
 
 func BuildCodeOfConduct() string {
+	defer CatchPanic()
 	return Url("/code-of-conduct", nil)
 }
 
 var RegexCommunicationGuidelines = regexp.MustCompile("^/communication-guidelines$")
 
 func BuildCommunicationGuidelines() string {
+	defer CatchPanic()
 	return Url("/communication-guidelines", nil)
 }
 
 var RegexContactPage = regexp.MustCompile("^/contact$")
 
 func BuildContactPage() string {
+	defer CatchPanic()
 	return Url("/contact", nil)
 }
 
 var RegexMonthlyUpdatePolicy = regexp.MustCompile("^/monthly-update-policy$")
 
 func BuildMonthlyUpdatePolicy() string {
+	defer CatchPanic()
 	return Url("/monthly-update-policy", nil)
 }
 
 var RegexProjectSubmissionGuidelines = regexp.MustCompile("^/project-guidelines$")
 
 func BuildProjectSubmissionGuidelines() string {
+	defer CatchPanic()
 	return Url("/project-guidelines", nil)
 }
 
@@ -130,6 +147,7 @@ func BuildProjectSubmissionGuidelines() string {
 var RegexMember = regexp.MustCompile(`^/m/(?P<member>[^/]+)$`)
 
 func BuildMember(username string) string {
+	defer CatchPanic()
 	if len(username) == 0 {
 		panic(oops.New(nil, "Username must not be blank"))
 	}
@@ -143,10 +161,12 @@ func BuildMember(username string) string {
 var RegexFeed = regexp.MustCompile(`^/feed(/(?P<page>.+)?)?$`)
 
 func BuildFeed() string {
+	defer CatchPanic()
 	return Url("/feed", nil)
 }
 
 func BuildFeedWithPage(page int) string {
+	defer CatchPanic()
 	if page < 1 {
 		panic(oops.New(nil, "Invalid feed page (%d), must be >= 1", page))
 	}
@@ -163,6 +183,7 @@ func BuildFeedWithPage(page int) string {
 var RegexPodcast = regexp.MustCompile(`^/podcast$`)
 
 func BuildPodcast(projectSlug string) string {
+	defer CatchPanic()
 	return ProjectUrl("/podcast", nil, projectSlug)
 }
 
@@ -175,6 +196,7 @@ func BuildPodcast(projectSlug string) string {
 var RegexForumCategory = regexp.MustCompile(`^/forums(/(?P<cats>[^\d/]+(/[^\d]+)*))?(/(?P<page>\d+))?$`)
 
 func BuildForumCategory(projectSlug string, subforums []string, page int) string {
+	defer CatchPanic()
 	if page < 1 {
 		panic(oops.New(nil, "Invalid forum thread page (%d), must be >= 1", page))
 	}
@@ -192,6 +214,7 @@ func BuildForumCategory(projectSlug string, subforums []string, page int) string
 var RegexForumNewThread = regexp.MustCompile(`^/forums(/(?P<cats>[^\d/]+(/[^\d]+)*))?/new?$`)
 
 func BuildForumNewThread(projectSlug string, subforums []string) string {
+	defer CatchPanic()
 	builder := buildForumCategoryPath(subforums)
 	builder.WriteString("/new")
 
@@ -201,12 +224,14 @@ func BuildForumNewThread(projectSlug string, subforums []string) string {
 var RegexForumThread = regexp.MustCompile(`^/forums(/(?P<cats>[^\d/]+(/[^\d]+)*))?/t/(?P<threadid>\d+)(-([^/]+))?(/(?P<page>\d+))?$`)
 
 func BuildForumThread(projectSlug string, subforums []string, threadId int, title string, page int) string {
+	defer CatchPanic()
 	builder := buildForumThreadPath(subforums, threadId, title, page)
 
 	return ProjectUrl(builder.String(), nil, projectSlug)
 }
 
 func BuildForumThreadWithPostHash(projectSlug string, subforums []string, threadId int, title string, page int, postId int) string {
+	defer CatchPanic()
 	builder := buildForumThreadPath(subforums, threadId, title, page)
 
 	return ProjectUrlWithFragment(builder.String(), nil, projectSlug, strconv.Itoa(postId))
@@ -215,6 +240,7 @@ func BuildForumThreadWithPostHash(projectSlug string, subforums []string, thread
 var RegexForumPost = regexp.MustCompile(`^/forums(/(?P<cats>[^\d/]+(/[^\d]+)*))?/t/(?P<threadid>\d+)/p/(?P<postid>\d+)$`)
 
 func BuildForumPost(projectSlug string, subforums []string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildForumPostPath(subforums, threadId, postId)
 
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -223,6 +249,7 @@ func BuildForumPost(projectSlug string, subforums []string, threadId int, postId
 var RegexForumPostDelete = regexp.MustCompile(`^/forums(/(?P<cats>[^\d/]+(/[^\d]+)*))?/t/(?P<threadid>\d+)/p/(?P<postid>\d+)/delete$`)
 
 func BuildForumPostDelete(projectSlug string, subforums []string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildForumPostPath(subforums, threadId, postId)
 	builder.WriteString("/delete")
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -231,6 +258,7 @@ func BuildForumPostDelete(projectSlug string, subforums []string, threadId int,
 var RegexForumPostEdit = regexp.MustCompile(`^/forums(/(?P<cats>[^\d/]+(/[^\d]+)*))?/t/(?P<threadid>\d+)/p/(?P<postid>\d+)/edit$`)
 
 func BuildForumPostEdit(projectSlug string, subforums []string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildForumPostPath(subforums, threadId, postId)
 	builder.WriteString("/edit")
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -240,6 +268,7 @@ var RegexForumPostReply = regexp.MustCompile(`^/forums(/(?P<cats>[^\d/]+(/[^\d]+
 
 // TODO: It's kinda weird that we have "replies" to a specific post. That's not how the data works. I guess this just affects what you see as the "post you're replying to" on the post composer page?
 func BuildForumPostReply(projectSlug string, subforums []string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildForumPostPath(subforums, threadId, postId)
 	builder.WriteString("/reply")
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -248,6 +277,7 @@ func BuildForumPostReply(projectSlug string, subforums []string, threadId int, p
 var RegexForumPostQuote = regexp.MustCompile(`^/forums(/(?P<cats>[^\d/]+(/[^\d]+)*))?/t/(?P<threadid>\d+)/p/(?P<postid>\d+)/quote$`)
 
 func BuildForumPostQuote(projectSlug string, subforums []string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildForumPostPath(subforums, threadId, postId)
 	builder.WriteString("/quote")
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -262,6 +292,7 @@ var RegexBlogsRedirect = regexp.MustCompile(`^/blogs`)
 var RegexBlog = regexp.MustCompile(`^/blog(/(?P<page>\d+))?$`)
 
 func BuildBlog(projectSlug string, page int) string {
+	defer CatchPanic()
 	if page < 1 {
 		panic(oops.New(nil, "Invalid blog page (%d), must be >= 1", page))
 	}
@@ -277,11 +308,13 @@ func BuildBlog(projectSlug string, page int) string {
 var RegexBlogThread = regexp.MustCompile(`^/blog/p/(?P<threadid>\d+)(-([^/]+))?(/(?P<page>\d+))?$`)
 
 func BuildBlogThread(projectSlug string, threadId int, title string, page int) string {
+	defer CatchPanic()
 	builder := buildBlogThreadPath(threadId, title, page)
 	return ProjectUrl(builder.String(), nil, projectSlug)
 }
 
 func BuildBlogThreadWithPostHash(projectSlug string, threadId int, title string, page int, postId int) string {
+	defer CatchPanic()
 	builder := buildBlogThreadPath(threadId, title, page)
 	return ProjectUrlWithFragment(builder.String(), nil, projectSlug, strconv.Itoa(postId))
 }
@@ -289,6 +322,7 @@ func BuildBlogThreadWithPostHash(projectSlug string, threadId int, title string,
 var RegexBlogPost = regexp.MustCompile(`^/blog/p/(?P<threadid>\d+)/e/(?P<postid>\d+)$`)
 
 func BuildBlogPost(projectSlug string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildBlogPostPath(threadId, postId)
 	return ProjectUrl(builder.String(), nil, projectSlug)
 }
@@ -296,6 +330,7 @@ func BuildBlogPost(projectSlug string, threadId int, postId int) string {
 var RegexBlogPostDelete = regexp.MustCompile(`^/blog/p/(?P<threadid>\d+)/e/(?P<postid>\d+)/delete$`)
 
 func BuildBlogPostDelete(projectSlug string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildBlogPostPath(threadId, postId)
 	builder.WriteString("/delete")
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -304,6 +339,7 @@ func BuildBlogPostDelete(projectSlug string, threadId int, postId int) string {
 var RegexBlogPostEdit = regexp.MustCompile(`^/blog/p/(?P<threadid>\d+)/e/(?P<postid>\d+)/edit$`)
 
 func BuildBlogPostEdit(projectSlug string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildBlogPostPath(threadId, postId)
 	builder.WriteString("/edit")
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -312,6 +348,7 @@ func BuildBlogPostEdit(projectSlug string, threadId int, postId int) string {
 var RegexBlogPostReply = regexp.MustCompile(`^/blog/p/(?P<threadid>\d+)/e/(?P<postid>\d+)/reply$`)
 
 func BuildBlogPostReply(projectSlug string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildBlogPostPath(threadId, postId)
 	builder.WriteString("/reply")
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -320,6 +357,7 @@ func BuildBlogPostReply(projectSlug string, threadId int, postId int) string {
 var RegexBlogPostQuote = regexp.MustCompile(`^/blog/p/(?P<threadid>\d+)/e/(?P<postid>\d+)/quote$`)
 
 func BuildBlogPostQuote(projectSlug string, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildBlogPostPath(threadId, postId)
 	builder.WriteString("/quote")
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -332,24 +370,28 @@ func BuildBlogPostQuote(projectSlug string, threadId int, postId int) string {
 var RegexWiki = regexp.MustCompile(`^/wiki$`)
 
 func BuildWiki(projectSlug string) string {
+	defer CatchPanic()
 	return ProjectUrl("/wiki", nil, projectSlug)
 }
 
 var RegexWikiIndex = regexp.MustCompile(`^/wiki/index$`)
 
 func BuildWikiIndex(projectSlug string) string {
+	defer CatchPanic()
 	return ProjectUrl("/wiki/index", nil, projectSlug)
 }
 
 var RegexWikiArticle = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)(-([^/])+)?$`)
 
 func BuildWikiArticle(projectSlug string, articleId int, title string) string {
+	defer CatchPanic()
 	builder := buildWikiArticlePath(articleId, title)
 
 	return ProjectUrl(builder.String(), nil, projectSlug)
 }
 
 func BuildWikiArticleWithSectionName(projectSlug string, articleId int, title string, sectionName string) string {
+	defer CatchPanic()
 	builder := buildWikiArticlePath(articleId, title)
 
 	return ProjectUrlWithFragment(builder.String(), nil, projectSlug, sectionName)
@@ -358,6 +400,7 @@ func BuildWikiArticleWithSectionName(projectSlug string, articleId int, title st
 var RegexWikiArticleEdit = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)/edit$`)
 
 func BuildWikiArticleEdit(projectSlug string, articleId int) string {
+	defer CatchPanic()
 	builder := buildWikiArticlePath(articleId, "")
 	builder.WriteString("/edit")
 
@@ -367,6 +410,7 @@ func BuildWikiArticleEdit(projectSlug string, articleId int) string {
 var RegexWikiArticleDelete = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)/delete$`)
 
 func BuildWikiArticleDelete(projectSlug string, articleId int) string {
+	defer CatchPanic()
 	builder := buildWikiArticlePath(articleId, "")
 	builder.WriteString("/delete")
 
@@ -376,6 +420,7 @@ func BuildWikiArticleDelete(projectSlug string, articleId int) string {
 var RegexWikiArticleHistory = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)(-([^/])+)?/history$`)
 
 func BuildWikiArticleHistory(projectSlug string, articleId int, title string) string {
+	defer CatchPanic()
 	builder := buildWikiArticlePath(articleId, title)
 	builder.WriteString("/history")
 
@@ -385,6 +430,7 @@ func BuildWikiArticleHistory(projectSlug string, articleId int, title string) st
 var RegexWikiTalk = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)(-([^/])+)?/talk$`)
 
 func BuildWikiTalk(projectSlug string, articleId int, title string) string {
+	defer CatchPanic()
 	builder := buildWikiArticlePath(articleId, title)
 	builder.WriteString("/talk")
 
@@ -394,6 +440,7 @@ func BuildWikiTalk(projectSlug string, articleId int, title string) string {
 var RegexWikiRevision = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)(-([^/])+)?/(?P<revisionid>\d+)$`)
 
 func BuildWikiRevision(projectSlug string, articleId int, title string, revisionId int) string {
+	defer CatchPanic()
 	if revisionId < 1 {
 		panic(oops.New(nil, "Invalid wiki revision id (%d), must be >= 1", revisionId))
 	}
@@ -407,6 +454,7 @@ func BuildWikiRevision(projectSlug string, articleId int, title string, revision
 var RegexWikiDiff = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)(-([^/])+)?/diff/(?P<revisionidold>\d+)/(?P<revisionidnew>\d+)$`)
 
 func BuildWikiDiff(projectSlug string, articleId int, title string, revisionIdOld int, revisionIdNew int) string {
+	defer CatchPanic()
 	if revisionIdOld < 1 {
 		panic(oops.New(nil, "Invalid wiki revision id (%d), must be >= 1", revisionIdOld))
 	}
@@ -426,6 +474,7 @@ func BuildWikiDiff(projectSlug string, articleId int, title string, revisionIdOl
 var RegexWikiTalkPost = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)/talk/(?P<postid>\d+)$`)
 
 func BuildWikiTalkPost(projectSlug string, articleId int, postId int) string {
+	defer CatchPanic()
 	builder := buildWikiTalkPath(articleId, postId)
 
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -434,6 +483,7 @@ func BuildWikiTalkPost(projectSlug string, articleId int, postId int) string {
 var RegexWikiTalkPostDelete = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)/talk/(?P<postid>\d+)/delete$`)
 
 func BuildWikiTalkPostDelete(projectSlug string, articleId int, postId int) string {
+	defer CatchPanic()
 	builder := buildWikiTalkPath(articleId, postId)
 	builder.WriteString("/delete")
 
@@ -443,6 +493,7 @@ func BuildWikiTalkPostDelete(projectSlug string, articleId int, postId int) stri
 var RegexWikiTalkPostEdit = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)/talk/(?P<postid>\d+)/edit$`)
 
 func BuildWikiTalkPostEdit(projectSlug string, articleId int, postId int) string {
+	defer CatchPanic()
 	builder := buildWikiTalkPath(articleId, postId)
 	builder.WriteString("/edit")
 
@@ -452,6 +503,7 @@ func BuildWikiTalkPostEdit(projectSlug string, articleId int, postId int) string
 var RegexWikiTalkPostReply = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)/talk/(?P<postid>\d+)/reply$`)
 
 func BuildWikiTalkPostReply(projectSlug string, articleId int, postId int) string {
+	defer CatchPanic()
 	builder := buildWikiTalkPath(articleId, postId)
 	builder.WriteString("/reply")
 
@@ -461,6 +513,7 @@ func BuildWikiTalkPostReply(projectSlug string, articleId int, postId int) strin
 var RegexWikiTalkPostQuote = regexp.MustCompile(`^/wiki/(?P<articleid>\d+)/talk/(?P<postid>\d+)/quote$`)
 
 func BuildWikiTalkPostQuote(projectSlug string, articleId int, postId int) string {
+	defer CatchPanic()
 	builder := buildWikiTalkPath(articleId, postId)
 	builder.WriteString("/quote")
 
@@ -474,18 +527,21 @@ func BuildWikiTalkPostQuote(projectSlug string, articleId int, postId int) strin
 var RegexLibrary = regexp.MustCompile(`^/library$`)
 
 func BuildLibrary(projectSlug string) string {
+	defer CatchPanic()
 	return ProjectUrl("/library", nil, projectSlug)
 }
 
 var RegexLibraryAll = regexp.MustCompile(`^/library/all$`)
 
 func BuildLibraryAll(projectSlug string) string {
+	defer CatchPanic()
 	return ProjectUrl("/library/all", nil, projectSlug)
 }
 
 var RegexLibraryTopic = regexp.MustCompile(`^/library/topic/(?P<topicid>\d+)$`)
 
 func BuildLibraryTopic(projectSlug string, topicId int) string {
+	defer CatchPanic()
 	if topicId < 1 {
 		panic(oops.New(nil, "Invalid library topic ID (%d), must be >= 1", topicId))
 	}
@@ -500,6 +556,7 @@ func BuildLibraryTopic(projectSlug string, topicId int) string {
 var RegexLibraryResource = regexp.MustCompile(`^/library/resource/(?P<resourceid>\d+)$`)
 
 func BuildLibraryResource(projectSlug string, resourceId int) string {
+	defer CatchPanic()
 	builder := buildLibraryResourcePath(resourceId)
 
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -508,12 +565,14 @@ func BuildLibraryResource(projectSlug string, resourceId int) string {
 var RegexLibraryDiscussion = regexp.MustCompile(`^/library/resource/(?P<resourceid>\d+)/d/(?P<threadid>\d+)(/(?P<page>\d+))?$`)
 
 func BuildLibraryDiscussion(projectSlug string, resourceId int, threadId int, page int) string {
+	defer CatchPanic()
 	builder := buildLibraryDiscussionPath(resourceId, threadId, page)
 
 	return ProjectUrl(builder.String(), nil, projectSlug)
 }
 
 func BuildLibraryDiscussionWithPostHash(projectSlug string, resourceId int, threadId int, page int, postId int) string {
+	defer CatchPanic()
 	if postId < 1 {
 		panic(oops.New(nil, "Invalid library post ID (%d), must be >= 1", postId))
 	}
@@ -525,6 +584,7 @@ func BuildLibraryDiscussionWithPostHash(projectSlug string, resourceId int, thre
 var RegexLibraryPost = regexp.MustCompile(`^/library/resource/(?P<resourceid>\d+)/d/(?P<threadid>\d+)/p/(?P<postid>\d+)$`)
 
 func BuildLibraryPost(projectSlug string, resourceId int, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildLibraryPostPath(resourceId, threadId, postId)
 
 	return ProjectUrl(builder.String(), nil, projectSlug)
@@ -533,6 +593,7 @@ func BuildLibraryPost(projectSlug string, resourceId int, threadId int, postId i
 var RegexLibraryPostDelete = regexp.MustCompile(`^/library/resource/(?P<resourceid>\d+)/d/(?P<threadid>\d+)/p/(?P<postid>\d+)/delete$`)
 
 func BuildLibraryPostDelete(projectSlug string, resourceId int, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildLibraryPostPath(resourceId, threadId, postId)
 	builder.WriteString("/delete")
 
@@ -542,6 +603,7 @@ func BuildLibraryPostDelete(projectSlug string, resourceId int, threadId int, po
 var RegexLibraryPostEdit = regexp.MustCompile(`^/library/resource/(?P<resourceid>\d+)/d/(?P<threadid>\d+)/p/(?P<postid>\d+)/edit$`)
 
 func BuildLibraryPostEdit(projectSlug string, resourceId int, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildLibraryPostPath(resourceId, threadId, postId)
 	builder.WriteString("/edit")
 
@@ -551,6 +613,7 @@ func BuildLibraryPostEdit(projectSlug string, resourceId int, threadId int, post
 var RegexLibraryPostReply = regexp.MustCompile(`^/library/resource/(?P<resourceid>\d+)/d/(?P<threadid>\d+)/p/(?P<postid>\d+)/reply$`)
 
 func BuildLibraryPostReply(projectSlug string, resourceId int, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildLibraryPostPath(resourceId, threadId, postId)
 	builder.WriteString("/reply")
 
@@ -560,6 +623,7 @@ func BuildLibraryPostReply(projectSlug string, resourceId int, threadId int, pos
 var RegexLibraryPostQuote = regexp.MustCompile(`^/library/resource/(?P<resourceid>\d+)/d/(?P<threadid>\d+)/p/(?P<postid>\d+)/quote$`)
 
 func BuildLibraryPostQuote(projectSlug string, resourceId int, threadId int, postId int) string {
+	defer CatchPanic()
 	builder := buildLibraryPostPath(resourceId, threadId, postId)
 	builder.WriteString("/quote")
 
@@ -573,12 +637,14 @@ func BuildLibraryPostQuote(projectSlug string, resourceId int, threadId int, pos
 var RegexProjectCSS = regexp.MustCompile("^/assets/project.css$")
 
 func BuildProjectCSS(color string) string {
+	defer CatchPanic()
 	return Url("/assets/project.css", []Q{{"color", color}})
 }
 
 var RegexPublic = regexp.MustCompile("^/public/.+$")
 
 func BuildPublic(filepath string, cachebust bool) string {
+	defer CatchPanic()
 	filepath = strings.Trim(filepath, "/")
 	if len(strings.TrimSpace(filepath)) == 0 {
 		panic(oops.New(nil, "Attempted to build a /public url with no path"))
@@ -605,6 +671,7 @@ func BuildPublic(filepath string, cachebust bool) string {
 }
 
 func BuildTheme(filepath string, theme string, cachebust bool) string {
+	defer CatchPanic()
 	if len(theme) == 0 {
 		panic(oops.New(nil, "Theme can't be blank"))
 	}
@@ -619,6 +686,7 @@ var RegexMarkRead = regexp.MustCompile(`^/_markread/(?P<catid>\d+)$`)
 
 // NOTE(asaf): categoryId == 0 means ALL CATEGORIES
 func BuildMarkRead(categoryId int) string {
+	defer CatchPanic()
 	if categoryId < 0 {
 		panic(oops.New(nil, "Invalid category ID (%d), must be >= 0", categoryId))
 	}
@@ -827,3 +895,11 @@ func PathSafeTitle(title string) string {
 	title = url.PathEscape(title)
 	return title
 }
+
+func CatchPanic() {
+	if !isTest {
+		if recovered := recover(); recovered != nil {
+			logging.LogPanicValue(nil, recovered, "Url construction failed")
+		}
+	}
+}
diff --git a/src/logging/logging.go b/src/logging/logging.go
index 3561b43b..8b1ed9b2 100644
--- a/src/logging/logging.go
+++ b/src/logging/logging.go
@@ -195,11 +195,7 @@ func LogPanicValue(logger *zerolog.Logger, val interface{}, msg string) {
 	}
 
 	if err, ok := val.(error); ok {
-		l := logger.Error().Err(err)
-		if _, ok := err.(*oops.Error); !ok {
-			l = l.Interface(zerolog.ErrorStackFieldName, oops.Trace())
-		}
-		l.Msg(msg)
+		logger.Error().Stack().Err(err).Msg(msg)
 	} else {
 		logger.Error().
 			Interface("recovered", val).