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-rw-r--r--utils/FileCheck/FileCheck.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/utils/FileCheck/FileCheck.cpp b/utils/FileCheck/FileCheck.cpp
index 74442ec144..563cab0d5d 100644
--- a/utils/FileCheck/FileCheck.cpp
+++ b/utils/FileCheck/FileCheck.cpp
@@ -242,7 +242,7 @@ bool Pattern::ParsePattern(StringRef PatternStr, SourceMgr &SM,
}
// Name can't start with a digit.
- if (isdigit(Name[0])) {
+ if (isdigit(static_cast<unsigned char>(Name[0]))) {
SM.PrintMessage(SMLoc::getFromPointer(Name.data()), SourceMgr::DK_Error,
"invalid name in named regex");
return true;