Merge pull request #252 from Alexendoo/66930-mir

Add MIR ICE of 66930

Author: JohnTitor

fixed/66930.rs renamed to fixed/66930-1.rs

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+rustc --emit mir --crate-type lib - << END
+static UTF8_CHAR_WIDTH: [u8; 0] = [];
+
+pub fn utf8_char_width(b: u8) -> usize {
+    UTF8_CHAR_WIDTH[b as usize] as usize
+}
+END