rust-lang / rust-lang/rust

`tests/debuginfo/pretty-std.rs` fails locally on Windows MSVC (cdb)

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A-debuggers-cdb A-debuginfo A-testsuite C-bug E-needs-investigation O-windows-msvc T-compiler
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Description

  • cdb version: Microsoft (R) Windows Debugger Version 10.0.26100.1742 AMD64

This test is failing locally for me due to

error: check directive(s) from `X:\repos\rust\tests\debuginfo\pretty-std.rs` not found in debugger output. errors:
    (pretty-std.rs:114) `os_string        : "IAMA OS string [...]" [Type: std::ffi::os_str::OsString]`
    (pretty-std.rs:116) `    [chars]          : "IAMA OS string [...]"`

The actual cdb output is

0:000>  dx os_string
os_string        : "IAMA OS string 😃" [Type: std::ffi::os_str::OsString    [<Raw View>]     [Type: std::ffi::os_str::OsString]
    [chars]          : "IAMA OS string 😃0:000>  dx some
some             : Some [Type: enum2$<core::option::Option<i16> >]
    [<Raw View>]     [Type: enum2$<core::option::Option<i16> >]
    [+0x002] __0              : 8 [Type: short]

(Hm, that seems to be missing a newline in between?)

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Research direction

Start with tests/debuginfo/pretty-std.rs, especially the check directives at lines 114 and 116, and reproduce the failure using Windows MSVC with the reported cdb version. Compare the directives with the shown debugger output, including the apparent missing newline. Done means the test's cdb output is handled correctly and the check directives pass.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
testing-qa
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
63/100

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