Add a test for rust-lang#26619

Author: varkor

src/test/ui/issues/issue-26619.rs

@@ -0,0 +1,24 @@
+#![feature(slice_patterns)]
+
+pub struct History<'a> { pub _s: &'a str }
+
+impl<'a> History<'a> {
+    pub fn get_page(&self) {
+        for s in vec!["1|2".to_string()].into_iter().filter_map(|ref line| self.make_entry(line)) {
+            //~^ ERROR borrowed value does not live long enough
+            println!("{:?}", s);
+        }
+    }
+
+    fn make_entry(&self, s: &'a String) -> Option<&str> {
+        let parts: Vec<_> = s.split('|').collect();
+        println!("{:?} -> {:?}", s, parts);
+
+        if let [commit, ..] = &parts[..] { Some(commit) } else { None }
+    }
+}
+
+fn main() {
+    let h = History{ _s: "" };
+    h.get_page();
+}

src/test/ui/issues/issue-26619.stderr

@@ -0,0 +1,12 @@
+error[E0597]: borrowed value does not live long enough
+  --> $DIR/issue-26619.rs:7:66
+   |
+LL |         for s in vec!["1|2".to_string()].into_iter().filter_map(|ref line| self.make_entry(line)) {
+   |                                                                  ^^^^^^^^                      -- temporary value needs to live until here
+   |                                                                  |                             |
+   |                                                                  |                             temporary value dropped here while still borrowed
+   |                                                                  temporary value does not live long enough
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0597`.