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Merge pull request #4724 from ethereum/slot-in-assembly

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Do not crash on using _slot and _offset suffixes on their own
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Alex Beregszaszi 2018-08-07 12:55:40 +01:00 committed by GitHub
commit 8b2d630275
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4 changed files with 24 additions and 0 deletions
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1
Changelog.md
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@ -81,6 +81,7 @@ Bugfixes:
* Code Generator: Fix allocation of byte arrays (zeroed out too much memory).
* Commandline Interface: Correctly handle paths with backslashes on windows.
* Fix NatSpec json output for `@notice` and `@dev` tags on contract definitions.
* References Resolver: Do not crash on using ``_slot`` and ``_offset`` suffixes on their own.
* References Resolver: Enforce ``storage`` as data location for mappings.
* References Resolver: Report error instead of assertion fail when FunctionType has an undeclared type as parameter.
* Type Checker: Disallow assignments to mappings within tuple assignments as well.

5
libsolidity/analysis/ReferencesResolver.cpp
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@ -256,6 +256,11 @@ bool ReferencesResolver::visit(InlineAssembly const& _inlineAssembly)
string("_slot").size() :
string("_offset").size()
));
if (realName.empty())
{
declarationError(_identifier.location, "In variable names _slot and _offset can only be used as a suffix.");
return size_t(-1);
}
declarations = m_resolver.nameFromCurrentScope(realName);
}
if (declarations.size() != 1)

9
test/libsolidity/syntaxTests/inlineAssembly/storage_reference_empty_offset.sol Normal file
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@ -0,0 +1,9 @@
contract C {
function f() public pure {
assembly {
_offset
}
}
}
// ----
// DeclarationError: (75-82): In variable names _slot and _offset can only be used as a suffix.

9
test/libsolidity/syntaxTests/inlineAssembly/storage_reference_empty_slot.sol Normal file
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@ -0,0 +1,9 @@
contract C {
function f() public pure {
assembly {
_slot
}
}
}
// ----
// DeclarationError: (75-80): In variable names _slot and _offset can only be used as a suffix.