# HG changeset patch
# User Raphaël Gomès <rgomes@octobus.net>
# Date 2020-05-07 21:53:12
# Node ID 1e9bfeaec9ba555c9e2c9bbd6e33db48f9e1fa9a
# Parent  ad1ec40975aa8032c573c5bb021cca0af4c7dea8

rust-regex: prevent nonsensical `.*.*` pattern from happening

Differential Revision: https://phab.mercurial-scm.org/D8507

diff --git a/rust/hg-core/src/filepatterns.rs b/rust/hg-core/src/filepatterns.rs
--- a/rust/hg-core/src/filepatterns.rs
+++ b/rust/hg-core/src/filepatterns.rs
@@ -181,7 +181,10 @@ fn _build_single_regex(entry: &IgnorePat
             // The `regex` crate accepts `**` while `re2` and Python's `re`
             // do not. Checking for `*` correctly triggers the same error all
             // engines.
-            if pattern[0] == b'^' || pattern[0] == b'*' {
+            if pattern[0] == b'^'
+                || pattern[0] == b'*'
+                || pattern.starts_with(b".*")
+            {
                 return pattern.to_owned();
             }
             [&b".*"[..], pattern].concat()