https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95744
Bug ID: 95744
Summary: Duplicate error message in a simple decltype specifier
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: haoxintu at gmail dot com
CC: mpolacek at gcc dot gnu.org, redi at gcc dot gnu.org
Target Milestone: ---
The test.cc includes a very simple valid decltype specifier with an undeclared
variable(I am definitely sure), but GCC emits two duplicated error messages on
it.
$cat test.cc
decltype(var) i = 100;
$g++-trunk -c -w test.cc
test.cc:1:10: error: ‘var’ was not declared in this scope
1 | decltype(var) i = 100;
| ^~~
test.cc:1:10: error: ‘var’ was not declared in this scope
While in clang
$clang++ -c -w test.cc
test.cc:1:10: error: use of undeclared identifier 'var'
decltype(var) i = 100;
^
1 error generated.
My GCC version is
$g++-trunk --version
g++ (GCC) 11.0.0 20200605 (experimental)
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