llvm-undname: Fix another crash-on-invalid found by oss-fuzz
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358363 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Demangle/MicrosoftDemangle.cpp b/lib/Demangle/MicrosoftDemangle.cpp
index 719e716..882913a 100644
--- a/lib/Demangle/MicrosoftDemangle.cpp
+++ b/lib/Demangle/MicrosoftDemangle.cpp
@@ -654,7 +654,10 @@
IdentifierNode *
Demangler::demangleFunctionIdentifierCode(StringView &MangledName,
FunctionIdentifierCodeGroup Group) {
- assert(!MangledName.empty());
+ if (MangledName.empty()) {
+ Error = true;
+ return nullptr;
+ }
switch (Group) {
case FunctionIdentifierCodeGroup::Basic:
switch (char CH = MangledName.popFront()) {
diff --git a/test/Demangle/invalid-manglings.test b/test/Demangle/invalid-manglings.test
index 473b3e4..eb22d1e 100644
--- a/test/Demangle/invalid-manglings.test
+++ b/test/Demangle/invalid-manglings.test
@@ -114,3 +114,8 @@
; CHECK-EMPTY:
; CHECK-NEXT: ??}
; CHECK-NEXT: error: Invalid mangled name
+
+?foo@?$?_
+; CHECK-EMPTY:
+; CHECK-NEXT: ?foo@?$?_
+; CHECK-NEXT: error: Invalid mangled name
