cdb debuginfo test failures

[jieyouxu]

EDIT: see https://rust-lang.zulipchat.com/#narrow/channel/242791-t-infra/topic/msvc.20update.20causing.20debuginfo.20failures, runner image update may have updated cdb?

I can't tell if this is a github runner issue, something changed with our x86_64-msvc CI, or a genuine flaky test, but these three tests have been failing on x86_64-msvc:

tests\debuginfo\numeric-types.rs
tests\debuginfo\range-types.rs
tests\debuginfo\unit-type.rs

#133094 (comment)
#133097 (comment)
#133029 (comment)
#132569 (comment)

But

rust/tests/debuginfo/numeric-types.rs

Line 1 in 46e8d20

//@ compile-flags:-g

was last modified 3 months ago and I don't recall seeing any PRs recently modifying debuginfo for cdb.

Opening this issue to track the failures.

[clubby789]

#132566 (comment)

[jieyouxu]

Looks like the output did change following new cdb version in CI

Microsoft (R) Windows Debugger Version 10.0.26100.2161 AMD64