Add m-esr52 at 52.6.0

1 files changed, 11 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/debug/bug1221378.js b/js/src/jit-test/tests/debug/bug1221378.js
new file mode 100644
index 000000000..d8e6781df
--- /dev/null
+++ b/js/src/jit-test/tests/debug/bug1221378.js
@@ -0,0 +1,11 @@
+// Bug 1221378: allocating an array from within the object metadata callback
+// shouldn't cause re-entrant resolution of lazy prototypes.
+
+// To test for this regression, we need some way to make the code that collects
+// metadata about object allocations allocate an Array. Presently,
+// enableShellObjectMetadataCallback installs a callback that does this, but if
+// that hook gets removed (in production there's only ever one callback we
+// actually use), then the ability to make whatever metadata collection code
+// remains allocate an Array will cover this regression. For example, it could
+// be a flag that one can only set in debug builds from TestingFunctions.cpp.
+newGlobal().eval('enableShellAllocationMetadataBuilder(); Array');