9 files changed, 23 insertions, 14 deletions
diff --git a/js/src/builtin/IntlTimeZoneData.h b/js/src/builtin/IntlTimeZoneData.h
index bb7d22109..f92c583df 100644
--- a/js/src/builtin/IntlTimeZoneData.h
+++ b/js/src/builtin/IntlTimeZoneData.h
@@ -1,5 +1,5 @@
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 #ifndef builtin_IntlTimeZoneData_h
 #define builtin_IntlTimeZoneData_h
diff --git a/js/src/jit/IonAnalysis.cpp b/js/src/jit/IonAnalysis.cpp
index 90303255d..2c9ffb607 100644
--- a/js/src/jit/IonAnalysis.cpp
+++ b/js/src/jit/IonAnalysis.cpp
@@ -2188,6 +2188,12 @@ IsRegExpHoistable(MIRGenerator* mir, MDefinition* regexp, MDefinitionVector& wor
 bool
 jit::MakeMRegExpHoistable(MIRGenerator* mir, MIRGraph& graph)
 {
+    // If we are compiling try blocks, regular expressions may be observable
+    // from catch blocks (which Ion does not compile). For now just disable the
+    // pass in this case.
+    if (graph.hasTryBlock())
+        return true;
+
     MDefinitionVector worklist(graph.alloc());
 
     for (ReversePostorderIterator block(graph.rpoBegin()); block != graph.rpoEnd(); block++) {
diff --git a/js/src/jsdate.cpp b/js/src/jsdate.cpp
index d73fb93d2..ccaeda2a3 100644..100755
--- a/js/src/jsdate.cpp
+++ b/js/src/jsdate.cpp
@@ -1232,7 +1232,10 @@ date_parse(JSContext* cx, unsigned argc, Value* vp)
 static ClippedTime
 NowAsMillis()
 {
-    return TimeClip(static_cast<double>(PRMJ_Now()) / PRMJ_USEC_PER_MSEC);
+    const double maxResolutionMs = 2;
+    double timestamp = static_cast<double>(PRMJ_Now()) / PRMJ_USEC_PER_MSEC;
+    timestamp = floor(timestamp / maxResolutionMs) * maxResolutionMs;
+    return TimeClip(timestamp);
 }
 
 bool
diff --git a/js/src/tests/Intl/DateTimeFormat/timeZone_backward_links.js b/js/src/tests/Intl/DateTimeFormat/timeZone_backward_links.js
index aeb1fc043..890b1c1d5 100644
--- a/js/src/tests/Intl/DateTimeFormat/timeZone_backward_links.js
+++ b/js/src/tests/Intl/DateTimeFormat/timeZone_backward_links.js
@@ -1,7 +1,7 @@
 // |reftest| skip-if(!this.hasOwnProperty("Intl"))
 
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 const tzMapper = [
     x => x,
diff --git a/js/src/tests/Intl/DateTimeFormat/timeZone_backzone.js b/js/src/tests/Intl/DateTimeFormat/timeZone_backzone.js
index b9d957a82..19fd871eb 100644
--- a/js/src/tests/Intl/DateTimeFormat/timeZone_backzone.js
+++ b/js/src/tests/Intl/DateTimeFormat/timeZone_backzone.js
@@ -1,7 +1,7 @@
 // |reftest| skip-if(!this.hasOwnProperty("Intl"))
 
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 const tzMapper = [
     x => x,
@@ -47,7 +47,6 @@ const links = {
     "Africa/Nouakchott": "Africa/Nouakchott",
     "Africa/Ouagadougou": "Africa/Ouagadougou",
     "Africa/Porto-Novo": "Africa/Porto-Novo",
-    "Africa/Sao_Tome": "Africa/Sao_Tome",
     "Africa/Timbuktu": "Africa/Timbuktu",
     "America/Anguilla": "America/Anguilla",
     "America/Antigua": "America/Antigua",
diff --git a/js/src/tests/Intl/DateTimeFormat/timeZone_backzone_links.js b/js/src/tests/Intl/DateTimeFormat/timeZone_backzone_links.js
index 7a358e997..34425acec 100644
--- a/js/src/tests/Intl/DateTimeFormat/timeZone_backzone_links.js
+++ b/js/src/tests/Intl/DateTimeFormat/timeZone_backzone_links.js
@@ -1,7 +1,7 @@
 // |reftest| skip-if(!this.hasOwnProperty("Intl"))
 
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 const tzMapper = [
     x => x,
diff --git a/js/src/tests/Intl/DateTimeFormat/timeZone_notbackward_links.js b/js/src/tests/Intl/DateTimeFormat/timeZone_notbackward_links.js
index 9515cb394..8b2dedec2 100644
--- a/js/src/tests/Intl/DateTimeFormat/timeZone_notbackward_links.js
+++ b/js/src/tests/Intl/DateTimeFormat/timeZone_notbackward_links.js
@@ -1,7 +1,7 @@
 // |reftest| skip-if(!this.hasOwnProperty("Intl"))
 
 // Generated by make_intl_data.py. DO NOT EDIT.
-// tzdata version = 2017c
+// tzdata version = 2018c
 
 const tzMapper = [
     x => x,
diff --git a/js/src/vm/Shape.cpp b/js/src/vm/Shape.cpp
index a64dc529a..306a2c540 100644
--- a/js/src/vm/Shape.cpp
+++ b/js/src/vm/Shape.cpp
@@ -1214,6 +1214,10 @@ JSObject::setFlags(ExclusiveContext* cx, BaseShape::Flag flags, GenerateShape ge
 
     RootedObject self(cx, this);
 
+    Shape* existingShape = self->ensureShape(cx);
+    if (!existingShape)
+        return false;
+
     if (isNative() && as<NativeObject>().inDictionaryMode()) {
         if (generateShape == GENERATE_SHAPE && !as<NativeObject>().generateOwnShape(cx))
             return false;
@@ -1227,10 +1231,6 @@ JSObject::setFlags(ExclusiveContext* cx, BaseShape::Flag flags, GenerateShape ge
         return true;
     }
 
-    Shape* existingShape = self->ensureShape(cx);
-    if (!existingShape)
-        return false;
-
     Shape* newShape = Shape::setObjectFlags(cx, flags, self->taggedProto(), existingShape);
     if (!newShape)
         return false;
diff --git a/js/src/vm/StructuredClone.cpp b/js/src/vm/StructuredClone.cpp
index 4b01cda85..3a062c3b8 100644
--- a/js/src/vm/StructuredClone.cpp
+++ b/js/src/vm/StructuredClone.cpp
@@ -2188,12 +2188,14 @@ JSStructuredCloneReader::readHeader()
         return in.reportTruncated();
 
     if (tag != SCTAG_HEADER) {
-        // Old structured clone buffer. We must have read it from disk or
-        // somewhere, so we can assume it's scope-compatible.
+        // Old structured clone buffer. We must have read it from disk.
+        storedScope = JS::StructuredCloneScope::DifferentProcess;
         return true;
     }
 
     MOZ_ALWAYS_TRUE(in.readPair(&tag, &data));
+    storedScope = JS::StructuredCloneScope(data);
+
     if (data != uint32_t(JS::StructuredCloneScope::SameProcessSameThread) &&
         data != uint32_t(JS::StructuredCloneScope::SameProcessDifferentThread) &&
         data != uint32_t(JS::StructuredCloneScope::DifferentProcess))
@@ -2202,7 +2204,6 @@ JSStructuredCloneReader::readHeader()
                                   "invalid structured clone scope");
         return false;
     }
-    storedScope = JS::StructuredCloneScope(data);
     if (storedScope < allowedScope) {
         JS_ReportErrorNumberASCII(context(), GetErrorMessage, nullptr, JSMSG_SC_BAD_SERIALIZED_DATA,
                                   "incompatible structured clone scope");