commit d6509cf21dd017392f82da0eb9b0345fbfc8970b
author Richard Smith <richard-llvm@metafoo.co.uk> Sat Sep 15 01:21:15 2018 +0000
committer Richard Smith <richard-llvm@metafoo.co.uk> Sat Sep 15 01:21:15 2018 +0000
tree 2b3223d4aabe04fc1205a9e2158019bd3c87275b
parent 66f3dc031d7922cb87b115ce8e5ca38db67aadd2

[modules] Frontend support for building a header module from a list of
headaer files.

llvm-svn: 342304

clang/lib/Sema/Sema.cpp

diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
index 82a04e1..4b0e69c 100644
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -977,7 +977,8 @@
     // module declaration by now.
     if (getLangOpts().getCompilingModule() ==
             LangOptions::CMK_ModuleInterface &&
-        ModuleScopes.back().Module->Kind != Module::ModuleInterfaceUnit) {
+        (ModuleScopes.empty() ||
+         ModuleScopes.back().Module->Kind != Module::ModuleInterfaceUnit)) {
       // FIXME: Make a better guess as to where to put the module declaration.
       Diag(getSourceManager().getLocForStartOfFile(
                getSourceManager().getMainFileID()),