Merge commit 'b52fb5234cd7c11ecfae51897a6f7fa52e8777fc' into clippyup

1 files changed, 17 insertions, 0 deletions

diff --git a/src/docs/string_slice.txt b/src/docs/string_slice.txt
new file mode 100644
index 00000000000..3d9e49dd39e
--- /dev/null
+++ b/src/docs/string_slice.txt
@@ -0,0 +1,17 @@
+### What it does
+Checks for slice operations on strings
+
+### Why is this bad?
+UTF-8 characters span multiple bytes, and it is easy to inadvertently confuse character
+counts and string indices. This may lead to panics, and should warrant some test cases
+containing wide UTF-8 characters. This lint is most useful in code that should avoid
+panics at all costs.
+
+### Known problems
+Probably lots of false positives. If an index comes from a known valid position (e.g.
+obtained via `char_indices` over the same string), it is totally OK.
+
+# Example
+```
+&"Ölkanne"[1..];
+```
\ No newline at end of file