https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91493
Bug ID: 91493
Summary: g++ 9.2.1 crashes compiling clickhouse
Product: gcc
Version: 9.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rafaeldtinoco at ubuntu dot com
Target Milestone: ---
The following function:
std::string toString(const ColumnDefaultKind kind)
{
static const std::unordered_map map{
{ ColumnDefaultKind::Default, AliasNames::DEFAULT },
{ ColumnDefaultKind::Materialized, AliasNames::MATERIALIZED },
{ ColumnDefaultKind::Alias, AliasNames::ALIAS }
};
const auto it = map.find(kind);
return it != std::end(map) ? it->second : throw Exception{"Invalid
ColumnDefaultKind", ErrorCodes::LOGICAL_ERROR};
}
causes gcc9 (with attached dump) to crash while other similar function (in
related syntax):
ColumnDefaultKind columnDefaultKindFromString(const std::string & str)
{
static const std::unordered_map map{
{ AliasNames::DEFAULT, ColumnDefaultKind::Default },
{ AliasNames::MATERIALIZED, ColumnDefaultKind::Materialized },
{ AliasNames::ALIAS, ColumnDefaultKind::Alias }
};
const auto it = map.find(str);
return it != std::end(map) ? it->second : throw Exception{"Unknown column
default specifier: " + str, ErrorCodes::LOGICAL_ERROR};
}
does not. Changing the syntax to:
std::string toString(const ColumnDefaultKind kind)
{
static const std::unordered_map map{
{ ColumnDefaultKind::Default, AliasNames::DEFAULT },
{ ColumnDefaultKind::Materialized, AliasNames::MATERIALIZED },
{ ColumnDefaultKind::Alias, AliasNames::ALIAS }
};
const auto it = map.find(kind);
if (it != std::end(map))
throw Exception{"Invalid ColumnDefaultKind",
ErrorCodes::LOGICAL_ERROR};
return it->second;
}
fixes the issue.
