buffer: prevent crash in reshape before document is parsed

Can happen e.g. if the window is resized or the user manually reshapes.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/server/buffer.nim b/src/server/buffer.nim
index 1c5f5ea2..329e6512 100644
--- a/src/server/buffer.nim
+++ b/src/server/buffer.nim
@@ -633,6 +633,8 @@ let quirkstyle = quirk.parseStylesheet()
 
 proc do_reshape(buffer: Buffer) =
   if buffer.ishtml:
+    if buffer.document == nil:
+      return # not parsed yet, nothing to render
     let uastyle = if buffer.document.mode != QUIRKS:
       uastyle
     else: