From 6cb6057250f677ecb6477efb289c6abb08da1f43 Mon Sep 17 00:00:00 2001
From: Fredrik Ekre <ekrefredrik@gmail.com>
Date: Mon, 8 Jul 2024 04:02:42 +0200
Subject: [PATCH] Fix let block without variables

---
 src/runestone.jl | 4 +++-
 test/runtests.jl | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/runestone.jl b/src/runestone.jl
index f497f50..917849b 100644
--- a/src/runestone.jl
+++ b/src/runestone.jl
@@ -1314,7 +1314,9 @@ function indent_let(ctx::Context, node::Node)
     vars_idx = 2
     vars_node = kids[vars_idx]
     @assert !is_leaf(vars_node) && kind(vars_node) === K"block"
-    @assert kind(last_leaf(vars_node)) !== "NewlineWs"
+    if span(vars_node) > 0 && length(verified_kids(vars_node)) > 0
+        @assert kind(last_leaf(vars_node)) !== "NewlineWs"
+    end
     # Third node is the NewlineWs before the block
     ln_idx = 3
     ln_node = kids[ln_idx]
diff --git a/test/runtests.jl b/test/runtests.jl
index 9fd68b7..da2f74d 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -453,6 +453,8 @@ end
         # let-end
         @test format_string("let a = 1\n$(sp)x\n$(sp)end") ==
             "let a = 1\n    x\nend"
+        @test format_string("let\n$(sp)x\n$(sp)end") ==
+            "let\n    x\nend"
         # begin-end
         @test format_string("begin\n$(sp)x\n$(sp)end") ==
             "begin\n    x\nend"