llvm@19 Invalid Range List Offset 0x1a in DW_AT_ranges Attribute in demo.exe Debug Information

[dongzhaolee]

Issue Description:

I have encountered an error when debugging rust demo on VSCode. The error message indicates that there is an issue with the DW_AT_ranges attribute in the debug information, specifically with an invalid range list offset.

Debug Console:

Console is in 'commands' mode, prefix expressions with '?'.
Loading Rust formatters from D:\rust.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/etc
Launching: C:\Users\zhaod\code\demo\target\debug\demo.exe
Launched process 13200 from 'C:\Users\zhaod\code\demo\target\debug\demo.exe'
error: demo.exe [0x00000000000021bf]: DIE has DW_AT_ranges(DW_FORM_sec_offset 0x000000000000001a) attribute, but range extraction failed (invalid range list offset 0x1a), please file a bug and attach the file at the start of this error message
error: demo.exe [0x00000000000021f1]: DIE has DW_AT_ranges(DW_FORM_sec_offset 0x000000000000001a) attribute, but range extraction failed (invalid range list offset 0x1a), please file a bug and attach the file at the start of this error message

llvm version & rustc version:

rustc 1.85.1 (4eb161250 2025-03-15)
binary: rustc
commit-hash: 4eb161250e340c8f48f66e2b929ef4a5bed7c181
commit-date: 2025-03-15
host: x86_64-pc-windows-gnu
release: 1.85.1
LLVM version: 19.1.7

lldb version 19.1.7-codelldb

Code:

fn main() {
    println!("Hello, world!");
    let v = vec![2, 3, 5, 7, 11];
    println!("{:?}", v);
}

In fact, on my Windows system, any code can reproduce the problem regardless, as long as breakpoints are set. There is no error reported when no breakpoint is set.

[llvmbot]

@llvm/issue-subscribers-debuginfo

Author: Leonhard (dongzhaolee)

**Issue Description:**

I have encountered an error when debugging rust demo on VSCode. The error message indicates that there is an issue with the DW_AT_ranges attribute in the debug information, specifically with an invalid range list offset.

Debug Console:

> Console is in 'commands' mode, prefix expressions with '?'.
> Loading Rust formatters from D:\rust.rustup\toolchains\stable-x86_64-pc-windows-gnu\lib/rustlib/etc
> Launching: C:\Users\zhaod\code\demo\target\debug\demo.exe
> Launched process 13200 from 'C:\Users\zhaod\code\demo\target\debug\demo.exe'
> error: demo.exe [0x00000000000021bf]: DIE has DW_AT_ranges(DW_FORM_sec_offset 0x000000000000001a) attribute, but range extraction failed (invalid range list offset 0x1a), please file a bug and attach the file at the start of this error message
> error: demo.exe [0x00000000000021f1]: DIE has DW_AT_ranges(DW_FORM_sec_offset 0x000000000000001a) attribute, but range extraction failed (invalid range list offset 0x1a), please file a bug and attach the file at the start of this error message

llvm version & rustc version:

> rustc 1.85.1 (4eb161250 2025-03-15)
> binary: rustc
> commit-hash: 4eb161250e340c8f48f66e2b929ef4a5bed7c181
> commit-date: 2025-03-15
> host: x86_64-pc-windows-gnu
> release: 1.85.1
> LLVM version: 19.1.7

> lldb version 19.1.7-codelldb

Code:

fn main() {
    println!("Hello, world!");
    let v = vec![2, 3, 5, 7, 11];
    println!("{:?}", v);
}

In fact, on my Windows system, any code can reproduce the problem regardless, as long as breakpoints are set. There is no error reported when no breakpoint is set.

[EugeneZelenko]

Could you please try 20 or main branch?

[dongzhaolee]

Could you please try 20 or main branch?

I just tried debugging with lvm@20, but unfortunately, the issue still exists. To rule out the problem with the codelldb extension I use in VSCode (of course, I also tried it, and the DW_AT_ranges issue still occurs), I directly used the command line for debugging.

I’ve tried multiple versions of LLVM, and the only one that works properly on my Windows 11 is LLVM 17. Any higher version results in errors. Unfortunately, this means I can't use the newer version of rustc, because the current rustc x86_64-pc-windows-gnu stable uses LLVM 19. If I use an older version of LLVM, like LLVM 17 (the latest version that works on my computer), it causes continuous debugging information anomalies. I’ve verified this, such as failing to display elements in a Vec and showing "invalid" instead.

Interestingly, in my previous debugging environment (switching from the MSVC toolchain to the GNU toolchain, with Visual Studio downloaded, while the MSVC toolchain is still present; I’m not sure if this is related), there were no errors even when using LLVM 19. The error only occurs when I use it on a new computer.

I do hope you @EugeneZelenko can help me solve this problem! Debugging Rust with LLDB is much more convenient than with GDB.

Below, I will provide the scenario during the debugging session.

[Universal-Invariant]

Same issues:

DIE has DW_AT_ranges(DW_FORM_sec_offset 0x000000000000001a) attribute, but range extraction failed (invalid range list offset 0x1a), please file a bug and attach the file at the start of this error message. stable-x86_64-pc-windows-gnu

Just recently started using rust and codelldb.

Also, before then:
warning: (x86_64) L:\test\test.exe unable to locate separate debug file (dwo, dwp). Debugging will be degraded.

This seems to be related to gnu and, my guess, some checks not existing for windows as these likely are connected to debugging on linux.