[turbofan] Gracefully handle missing info()->context() in CodeGenerator::IsMaterializableFromFrame()

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 8a0ea19b62caf3a70e1d929fa1b698cd2d07fd49..7e0f0fdfbcda8ed644ddd18ceaf0c4288d52b44b 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -102,6 +102,11 @@ bool CompilationInfo::has_shared_info() const {
 }
 
 
+bool CompilationInfo::has_context() const {
+  return parse_info_ && !parse_info_->context().is_null();
+}
+
+
 CompilationInfo::CompilationInfo(ParseInfo* parse_info)
     : CompilationInfo(parse_info, nullptr, BASE, parse_info->isolate(),
                       parse_info->zone()) {