Add test for priorities while looping and split the new_breadcrumbs function into two separate new_breadcrumbs functions because sections and partials have different orderings.

js/test_cases/explicit_context_setting/README.md

@@ -4,6 +4,8 @@ Partials: Explicit context takes priority over parameters
 
 Sections: New context takes priority, then parameters, then explicit
 
+Sections with loops: Loop variables ($idx and $len) take priority over parameters and explicit context
+
 $idx and $len
 -------------
 

js/test_cases/explicit_context_setting/main.dust

@@ -326,3 +326,34 @@ Section vs Partial priority{~n}
     {pet}{~n}
 {/some_global}
 {>priority:explicit pet="snake"/}
+
+Section vs Partial priority Failed Walk{~n}
+======================================={~n}
+{#doesnotexist:explicit pet="snake"}
+    MAIN {pet}{~n}
+{:else}
+    ELSE {pet}{~n}
+{/doesnotexist}
+{>priority:explicit pet="snake"/}
+
+Section Loop set $idx as a parameter{~n}
+===================================={~n}
+{#loop $idx="7"}
+    $idx is {$idx}{~n}
+    $len is {$len}{~n}
+{/loop}
+
+Section Loop set $idx in explicit context{~n}
+========================================={~n}
+{#loop:has_idx}
+    $idx is {$idx}{~n}
+    $len is {$len}{~n}
+{/loop}
+
+Section Loop set $idx in explicit context and parameter{~n}
+======================================================={~n}
+{#loop:has_idx $idx="7"}
+    $idx is {$idx}{~n}
+    $len is {$len}{~n}
+{/loop}
+