commit 581f72dc8fa8157dcbd42ca62e95a6d9ecad53f2
author David Tolnay <dtolnay@gmail.com> Wed Nov 25 15:48:59 2020 -0800
committer David Tolnay <dtolnay@gmail.com> Wed Nov 25 16:00:03 2020 -0800
tree 9ac9ea0ae4a3536314e72f9f2e3c3e1ce8ea56a3
parent bc8e0276632c0b5512e5579653bf5587f22dbcc4

Disallow array with zero size

syntax/parse.rs

diff --git a/syntax/parse.rs b/syntax/parse.rs
index 18809b5..018e71a 100644
--- a/syntax/parse.rs
+++ b/syntax/parse.rs
@@ -767,9 +767,14 @@
         return Err(Error::new_spanned(len_expr, msg));
     };
 
+    let len = len_token.base10_parse::<usize>()?;
+    if len == 0 {
+        let msg = "array with zero size is not supported";
+        return Err(Error::new_spanned(ty, msg));
+    }
+
     let bracket = ty.bracket_token;
     let semi_token = ty.semi_token;
-    let len = len_token.base10_parse::<usize>()?;
 
     Ok(Type::Array(Box::new(Array {
         bracket,