[js] Fix invalid early return in BaselineFrame::trace.

We were not tracing debugger environments for Baseline frames without any
local/expression slots.

1 files changed, 14 insertions, 14 deletions

diff --git a/js/src/jit/BaselineFrame.cpp b/js/src/jit/BaselineFrame.cpp
index b8c61300fc..3f00e9b36a 100644
--- a/js/src/jit/BaselineFrame.cpp
+++ b/js/src/jit/BaselineFrame.cpp
@@ -62,24 +62,24 @@ BaselineFrame::trace(JSTracer* trc, JitFrameIterator& frameIterator)
 
     // NB: It is possible that numValueSlots() could be zero, even if nfixed is
     // nonzero.  This is the case if the function has an early stack check.
-    if (numValueSlots() == 0)
-        return;
+    if (numValueSlots > 0) {
 
-    MOZ_ASSERT(nfixed <= numValueSlots());
+        MOZ_ASSERT(nfixed <= numValueSlots());
 
-    if (nfixed == nlivefixed) {
-        // All locals are live.
-        MarkLocals(this, trc, 0, numValueSlots());
-    } else {
-        // Mark operand stack.
-        MarkLocals(this, trc, nfixed, numValueSlots());
+        if (nfixed == nlivefixed) {
+            // All locals are live.
+            MarkLocals(this, trc, 0, numValueSlots());
+        } else {
+            // Mark operand stack.
+            MarkLocals(this, trc, nfixed, numValueSlots());
 
-        // Clear dead block-scoped locals.
-        while (nfixed > nlivefixed)
-            unaliasedLocal(--nfixed).setUndefined();
+            // Clear dead block-scoped locals.
+            while (nfixed > nlivefixed)
+                unaliasedLocal(--nfixed).setUndefined();
 
-        // Mark live locals.
-        MarkLocals(this, trc, 0, nlivefixed);
+            // Mark live locals.
+            MarkLocals(this, trc, 0, nlivefixed);
+        }
     }
 
     if (script->compartment()->debugEnvs)