Improve error handling in YAML parsing

Some scanner errors were not checked and reported by the parser.

Fix PR30934. Recommit r288014 after fixing unittest.

Patch by: Serge Guelton <serge.guelton@telecom-bretagne.eu>

Differential Revision: https://reviews.llvm.org/D26419

llvm-svn: 288071

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/unittests/Support/YAMLIOTest.cpp b/llvm/unittests/Support/YAMLIOTest.cpp
index bf70e749b4f..c3e18d33235 100644
--- a/llvm/unittests/Support/YAMLIOTest.cpp
+++ b/llvm/unittests/Support/YAMLIOTest.cpp
@@ -2368,3 +2368,11 @@ TEST(YAMLIO, TestMapWithContext) {
             out);
   out.clear();
 }
+
+TEST(YAMLIO, InvalidInput) {
+  // polluting 1 value in the sequence
+  Input yin("---\n- foo:  3\n  bar:  5\n1\n- foo:  3\n  bar:  5\n...\n");
+  std::vector<FooBar> Data;
+  yin >> Data;
+  EXPECT_TRUE((bool)yin.error());
+}