Always evaluate the expression in [expr; n]

[dotdash]

Currently, [panic!(); 0] will panic, but let x = [panic!(); 0] will not, because the expression is not evaluated in that case.

[rprichard]

Also, let x = [panic!(); 2]; crashes the compiler. Maybe it's the same issue?

PHINode should have one entry for each predecessor of its parent basic block!
  %4 = phi i64 [ 0, %entry-block ], [ %5, %expr_repeat ]
LLVM ERROR: Broken function found, compilation aborted!

[dotdash]

@rprichard Thanks for the reminder, #23365 fixes that as well.