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Fix ICE by avoiding copyForLocation() on ArraySliceType

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This commit is contained in:
Mathias Baumann 2020-05-26 17:23:49 +02:00
parent 5fedb4eab0
commit b3cafe4583
4 changed files with 16 additions and 4 deletions
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1
Changelog.md
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@ -13,6 +13,7 @@ Compiler Features:
Bugfixes: Bugfixes:
* Optimizer: Fixed a bug in BlockDeDuplicator. * Optimizer: Fixed a bug in BlockDeDuplicator.
* Type Checker: Disallow assignments to storage variables of type ``mapping``. * Type Checker: Disallow assignments to storage variables of type ``mapping``.
* Type Checker: Fix internal compiler error when accessing members of array slices.
* NatSpec: DocString block is terminated when encountering an empty line. * NatSpec: DocString block is terminated when encountering an empty line.
* Scanner: Fix bug when two empty NatSpec comments lead to scanning past EOL. * Scanner: Fix bug when two empty NatSpec comments lead to scanning past EOL.
* Code Generator: Trigger proper unimplemented errors on certain array copy operations. * Code Generator: Trigger proper unimplemented errors on certain array copy operations.

2
libsolidity/analysis/TypeChecker.cpp
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@ -2555,7 +2555,7 @@ bool TypeChecker::visit(MemberAccess const& _memberAccess)
if (possibleMembers.empty()) if (possibleMembers.empty())
{ {
if (initialMemberCount == 0) if (initialMemberCount == 0 && !dynamic_cast<ArraySliceType const*>(exprType))
{ {
// Try to see if the member was removed because it is only available for storage types. // Try to see if the member was removed because it is only available for storage types.
auto storageType = TypeProvider::withLocationIfReference( auto storageType = TypeProvider::withLocationIfReference(

9
libsolidity/ast/Types.cpp
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@ -349,14 +349,17 @@ TypePointer Type::fullEncodingType(bool _inLibraryCall, bool _encoderV2, bool) c
MemberList::MemberMap Type::boundFunctions(Type const& _type, ContractDefinition const& _scope) MemberList::MemberMap Type::boundFunctions(Type const& _type, ContractDefinition const& _scope)
{ {
// Normalise data location of type. // Normalise data location of type.
TypePointer type = TypeProvider::withLocationIfReference(DataLocation::Storage, &_type); DataLocation typeLocation = DataLocation::Storage;
if (auto refType = dynamic_cast<ReferenceType const*>(&_type))
typeLocation = refType->location();
set<Declaration const*> seenFunctions; set<Declaration const*> seenFunctions;
MemberList::MemberMap members; MemberList::MemberMap members;
for (ContractDefinition const* contract: _scope.annotation().linearizedBaseContracts) for (ContractDefinition const* contract: _scope.annotation().linearizedBaseContracts)
for (UsingForDirective const* ufd: contract->usingForDirectives()) for (UsingForDirective const* ufd: contract->usingForDirectives())
{ {
if (ufd->typeName() && *type != *TypeProvider::withLocationIfReference( if (ufd->typeName() && _type != *TypeProvider::withLocationIfReference(
DataLocation::Storage, typeLocation,
ufd->typeName()->annotation().type ufd->typeName()->annotation().type
)) ))
continue; continue;

8
test/libsolidity/syntaxTests/array/slice/member_access.sol Normal file
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@ -0,0 +1,8 @@
// Used to cause ICE
contract C {
function f(uint[] calldata x) external pure {
x[1:2].a;
}
}
// ----
// TypeError: (92-100): Member "a" not found or not visible after argument-dependent lookup in uint256[] calldata slice.