Failed to capture backtrace when compiling with `--remap-path-prefix=${PWD}=`

[ashi009]

To reproduce:

$ git clone https://github.com/ashi009/backtrace-rs.git
$ cd backtrace-rs

When --remap-path-prefix is not set, we can see the source info for 4-7:

$ cargo run
   Compiling libc v0.2.169
   Compiling object v0.36.7
   Compiling gimli v0.31.1
   Compiling memchr v2.7.4
   Compiling adler2 v2.0.0
   Compiling cfg-if v1.0.0
   Compiling rustc-demangle v0.1.24
   Compiling miniz_oxide v0.8.3
   Compiling addr2line v0.24.2
   Compiling backtrace v0.3.74
   Compiling backtrace-rs v0.1.0 (/Users/xiaoyishi/Projects/backtrace-rs)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.46s
     Running `target/debug/backtrace-rs`
   0: backtrace::backtrace::libunwind::trace
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/backtrace/libunwind.rs:116:5
      backtrace::backtrace::trace_unsynchronized
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/backtrace/mod.rs:66:5
   1: backtrace::backtrace::trace
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/backtrace/mod.rs:53:14
   2: backtrace::capture::Backtrace::create
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/capture.rs:292:9
   3: backtrace::capture::Backtrace::new
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/capture.rs:257:22
   4: backtrace_rs::main
             at /Users/xiaoyishi/Projects/backtrace-rs/src/main.rs:4:14
   5: core::ops::function::FnOnce::call_once
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/ops/function.rs:250:5
   6: std::sys::backtrace::__rust_begin_short_backtrace
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/sys/backtrace.rs:154:18
   7: std::rt::lang_start::{{closure}}
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:164:18
   8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/ops/function.rs:284:13
      std::panicking::try::do_call
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:554:40
      std::panicking::try
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:518:19
      std::panic::catch_unwind
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panic.rs:345:14
      std::rt::lang_start_internal::{{closure}}
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:143:48
      std::panicking::try::do_call
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:554:40
      std::panicking::try
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:518:19
      std::panic::catch_unwind
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panic.rs:345:14
      std::rt::lang_start_internal
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:143:20
   9: std::rt::lang_start
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:163:17
  10: _main

Once mapped path to "", 4-7 gives no source info.

$ RUSTFLAGS="--remap-path-prefix=$(pwd)=" cargo run
   Compiling object v0.36.7
   Compiling libc v0.2.169
   Compiling gimli v0.31.1
   Compiling memchr v2.7.4
   Compiling adler2 v2.0.0
   Compiling rustc-demangle v0.1.24
   Compiling cfg-if v1.0.0
   Compiling miniz_oxide v0.8.3
   Compiling addr2line v0.24.2
   Compiling backtrace v0.3.74
   Compiling backtrace-rs v0.1.0 (/Users/xiaoyishi/Projects/backtrace-rs)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.43s
     Running `target/debug/backtrace-rs`
   0: backtrace::backtrace::libunwind::trace
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/backtrace/libunwind.rs:116:5
      backtrace::backtrace::trace_unsynchronized
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/backtrace/mod.rs:66:5
   1: backtrace::backtrace::trace
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/backtrace/mod.rs:53:14
   2: backtrace::capture::Backtrace::create
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/capture.rs:292:9
   3: backtrace::capture::Backtrace::new
             at /Users/xiaoyishi/.cargo/registry/src/index.crates.io-6f17d22bba15001f/backtrace-0.3.74/src/capture.rs:257:22
   4: backtrace_rs::main
   5: core::ops::function::FnOnce::call_once
   6: std::sys::backtrace::__rust_begin_short_backtrace
   7: std::rt::lang_start::{{closure}}
   8: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/core/src/ops/function.rs:284:13
      std::panicking::try::do_call
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:554:40
      std::panicking::try
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:518:19
      std::panic::catch_unwind
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panic.rs:345:14
      std::rt::lang_start_internal::{{closure}}
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:143:48
      std::panicking::try::do_call
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:554:40
      std::panicking::try
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panicking.rs:518:19
      std::panic::catch_unwind
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/panic.rs:345:14
      std::rt::lang_start_internal
             at /rustc/f6e511eec7342f59a25f7c0534f1dbea00d01b14/library/std/src/rt.rs:143:20
   9: std::rt::lang_start
  10: _main