1 files changed, 52 insertions, 0 deletions
diff --git a/src/tools/rustfmt/tests/source/issue_3853.rs b/src/tools/rustfmt/tests/source/issue_3853.rs
new file mode 100644
index 000000000..c41309bc7
--- /dev/null
+++ b/src/tools/rustfmt/tests/source/issue_3853.rs
@@ -0,0 +1,52 @@
+fn by_ref_with_block_before_ident() {
+if let Some(ref     /*def*/      state)=        foo{
+				println!(
+        "asdfasdfasdf");	}
+}
+
+fn mut_block_before_ident() {
+if   let Some(mut     /*def*/    state  ) =foo{
+				println!(
+        "123"   );	}
+}
+
+fn ref_and_mut_blocks_before_ident() {
+if   let Some(ref  /*abc*/
+    mut     /*def*/    state  )    =       foo {
+				println!(
+ "deefefefefefwea"   );	}
+}
+
+fn sub_pattern() {
+    let foo @             /*foo*/
+bar(f) = 42;
+}
+
+fn no_prefix_block_before_ident() {
+if   let Some(
+    /*def*/    state  )    =       foo {
+				println!(
+ "129387123123"   );	}
+}
+
+fn issue_3853() {
+if let Some(ref /*mut*/ state) = foo {
+					}
+}
+
+fn double_slash_comment_between_lhs_and_rhs() {
+    if let Some(e) =
+				 // self.foo.bar(e, tx)
+				 packet.transaction.state.committed
+                {
+            // body
+                            println!(
+                                "a2304712836123");
+                                }
+}
+
+fn block_comment_between_lhs_and_rhs() {
+if let Some(ref     /*def*/  mut     /*abc*/       state)=          /*abc*/foo{
+				println!(
+        "asdfasdfasdf");	}
+}