Fix index out of bound in case of empty snippet

2019-09-02 20:38:40 +07:00 · 2019-09-02 20:38:40 +07:00 · 17d445b66d
commit 17d445b66d
parent 1f9993729b
1 changed files with 2 additions and 1 deletions
--- a/clippy_lints/src/misc_early.rs
+++ b/clippy_lints/src/misc_early.rs
@ -393,7 +393,8 @@ impl MiscEarlyLints {
        // The `line!()` macro is compiler built-in and a special case for these lints.
        let lit_snip = match snippet_opt(cx, lit.span) {
            Some(snip) => {
-                if snip.contains('!') {
+                // The snip could be empty in case of expand from procedure macro
+                if snip.is_empty() || snip.contains('!') {
                    return;
                }
                snip