debuginfo: Added description of algorithm for handling recursive types.

Also fixed nasty bug caused by calling LLVMDIBuilderCreateStructType() with a null pointer where an empty array was expected (which would trigger an unintelligable assertion somewhere down the line).

2 files changed, 6 insertions, 6 deletions

diff --git a/src/test/debug-info/recursive-struct.rs b/src/test/debug-info/recursive-struct.rs
index 4c602ba3832..b8a43d6d16a 100644
--- a/src/test/debug-info/recursive-struct.rs
+++ b/src/test/debug-info/recursive-struct.rs
@@ -142,14 +142,14 @@ struct LongCycleWithAnonymousTypes {
 
 // This test case makes sure that recursive structs are properly described. The Node structs are
 // generic so that we can have a new type (that newly needs to be described) for the different
-// cases. The potential problem with recursive types is that the DI generation algorithm get trapped
-// in an endless loop. To make sure, we actually test this in the different cases, we have to
-// operate on a new type each time, otherwise we would just hit the DI cache for all but the first
-// case.
+// cases. The potential problem with recursive types is that the DI generation algorithm gets
+// trapped in an endless loop. To make sure, we actually test this in the different cases, we have
+// to operate on a new type each time, otherwise we would just hit the DI cache for all but the
+// first case.
 
 // The different cases below (stack_*, unique_*, box_*, etc) are set up so that the type description
 // algorithm will enter the type reference cycle that is created by a recursive definition from a
-// different context.
+// different context each time.
 
 // The "long cycle" cases are constructed to span a longer, indirect recursion cycle between types.
 // The different locals will cause the DI algorithm to enter the type reference cycle at different
diff --git a/src/test/debug-info/trait-pointers.rs b/src/test/debug-info/trait-pointers.rs
index 1a5e3505511..4ec9fae1e2f 100644
--- a/src/test/debug-info/trait-pointers.rs
+++ b/src/test/debug-info/trait-pointers.rs
@@ -24,7 +24,7 @@ struct Struct {
 
 impl Trait for Struct {}
 
-// There is no real test here yet. Just make that it compiles without crashing.
+// There is no real test here yet. Just make sure that it compiles without crashing.
 fn main() {
     let stack_struct = Struct { a:0, b: 1.0 };
     let reference: &Trait = &stack_struct as &Trait;