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-rw-r--r--libsolidity/codegen/CompilerContext.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/libsolidity/codegen/CompilerContext.h b/libsolidity/codegen/CompilerContext.h
index 1968c1e1..13821f67 100644
--- a/libsolidity/codegen/CompilerContext.h
+++ b/libsolidity/codegen/CompilerContext.h
@@ -272,7 +272,10 @@ private:
/// Storage offsets of state variables
std::map<Declaration const*, std::pair<u256, unsigned>> m_stateVariables;
/// Offsets of local variables on the stack (relative to stack base).
- std::map<Declaration const*, unsigned> m_localVariables;
+ /// This needs to be a stack because if a modifier contains a local variable and this
+ /// modifier is applied twice, the position of the variable needs to be restored
+ /// after the nested modifier is left.
+ std::map<Declaration const*, std::vector<unsigned>> m_localVariables;
/// List of current inheritance hierarchy from derived to base.
std::vector<ContractDefinition const*> m_inheritanceHierarchy;
/// Stack of current visited AST nodes, used for location attachment