fix: print error set members in a consistent order

Co-authored-by: Matthew Lugg <mlugg@mlugg.co.uk>

1 files changed, 11 insertions, 0 deletions

diff --git a/test/cases/compile_errors/error_set_display.zig b/test/cases/compile_errors/error_set_display.zig
new file mode 100644
index 0000000000..b4c911fe06
--- /dev/null
+++ b/test/cases/compile_errors/error_set_display.zig
@@ -0,0 +1,11 @@
+const Set0 = error{ A, B, C, D, E, F };
+const Set1 = error{ F, E, D, C, A };
+comptime {
+    const x = Set0.B;
+    const y: Set1 = @errorCast(x);
+    _ = y;
+}
+
+// error
+//
+// :5:21: error: 'error.B' not a member of error set 'error{A,C,D,E,F}'