Rename test locals to work around LLDB bug

[ranweiler]

LLDB's expression parser can't unambiguously resolve local variables in
some cases, as described in #47938. Work around this by using names that
don't shadow direct submodules of core.

Closes#64050.

[rust-highfive]

r? @alexcrichton

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[ranweiler]

Note: at least in some cases, you can avoid the lldb bug by using single quotes around the local var, as described here. I've found this to work locally when using rust-lldb on one of the minimal examples in the other issue.

However, this trick doesn't work in the test harness's usage, because we want to do print *'unique' (note the deref) instead of e.g. print 'foo'. This generally causes the following (test-failing) error from lldb:

print *'unique'
error: warning: multi-character character constant
warning: character constant too long for its type
error: indirection requires pointer operand ('int' invalid)

[alexcrichton]

@bors: r+ rollup

Seems reasonable to me in any case, thanks!

[bors]

📌 Commit 6ed50f4 has been approved by alexcrichton

[Centril]

@bors rollup-

[bors]

⌛ Testing commit 6ed50f4 with merge 9681cb140952433f7b4f697616cf01d302c10e9c...

[Centril]

@bors retry rolled up.