a read of a variable outside its lifetime is not identified.

[drhaozhong]

The code is as follows:

void bar(int n, int x[n]) {}

MSVC reports an error:

(1): error C2131: expression did not evaluate to a constant (1): note: failure was caused by a read of a variable outside its lifetime (1): note: see usage of 'n' Compiler returned: 2

GCC reports a similar error:

error: use of parameter outside function body before ‘]’ token

However, the clang++ in this project does not report any errors.

[dm-vodopyanov]

Closing due to #8967 (comment)