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-rw-r--r--lib/MC/MCSymbol.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/MC/MCSymbol.cpp b/lib/MC/MCSymbol.cpp
index 07751f7..ebd3144 100644
--- a/lib/MC/MCSymbol.cpp
+++ b/lib/MC/MCSymbol.cpp
@@ -40,6 +40,7 @@ static bool NameNeedsQuoting(StringRef Str) {
}
void MCSymbol::setVariableValue(const MCExpr *Value) {
+ assert(!IsUsed && "Cannot set a variable that has already been used.");
assert(Value && "Invalid variable value!");
assert((isUndefined() || (isAbsolute() && isa<MCConstantExpr>(Value))) &&
"Invalid redefinition!");