https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97363
Bug ID: 97363
Summary: Missing diagnostics when trying to initialize rvalue
reference variable with lvalue expression when using
decltype(auto) type deduction.
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: anders.granlund.0 at gmail dot com
Target Milestone: ---
Consider the following program:
int main()
{
int &&x = 0;
decltype(auto) y = x; // Should behave like int &&y = x; and thus give a
// compilation error since x is an lvalue.
}
When compiling it with -std=c++20 -pedantic-errors it compiles without
errors.
I expect it instead to give a compilation error for the reason given in the
comment in the program.
Note that clang correctly gives the expected compilation error.
Compiler explorer link (clang to the left and gcc to the right):
https://godbolt.org/z/xzfjMP
