[libc++] Fix build failures after merging <charconv>

Summary:
- fix a stupid unit test typo
- add <charconv> symbols to Linux abilist

Reviewers: EricWF

Subscribers: christof, ldionne, cfe-commits

Differential Revision: https://reviews.llvm.org/D50130

llvm-svn: 338486

2 files changed, 2 insertions, 1 deletions

diff --git a/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp b/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
index e5a93b49735..3fc533a772f 100644
--- a/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
+++ b/libcxx/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
@@ -37,6 +37,7 @@ struct test_basics : roundtrip_test_base<T>
             using xl = std::numeric_limits<T>;
 
             test(1, b);
+            test(-1, b);
             test(xl::lowest(), b);
             test((xl::max)(), b);
             test((xl::max)() / 2, b);
diff --git a/libcxx/test/support/charconv_test_helpers.h b/libcxx/test/support/charconv_test_helpers.h
index df1b00a67b4..1560fa79aad 100644
--- a/libcxx/test/support/charconv_test_helpers.h
+++ b/libcxx/test/support/charconv_test_helpers.h
@@ -178,7 +178,7 @@ struct roundtrip_test_base
             {
                 assert(x == 0xc);
                 assert(r2.ptr == buf);
-                assert(r.ec == std::errc::invalid_argument);
+                assert(r2.ec == std::errc::invalid_argument);
             }
             else
             {