Enable LLDB debug info tests on CI

Author: EFanZh

src/ci/docker/host-x86_64/x86_64-gnu-llvm-19/Dockerfile

@@ -16,6 +16,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   cmake \
   sudo \
   gdb \
+  lldb-19 \
   llvm-19-tools \
   llvm-19-dev \
   libedit-dev \
@@ -52,6 +53,7 @@ ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
       --llvm-root=/usr/lib/llvm-19 \
       --enable-llvm-link-shared \
+      --set build.lldb=lldb-19 \
       --set rust.randomize-layout=true \
       --set rust.thin-lto-import-instr-limit=10
 

src/ci/docker/host-x86_64/x86_64-gnu-llvm-20/Dockerfile

@@ -16,6 +16,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   cmake \
   sudo \
   gdb \
+  lldb-20 \
   llvm-20-tools \
   llvm-20-dev \
   libedit-dev \
@@ -52,6 +53,7 @@ ENV RUST_CONFIGURE_ARGS \
       --build=x86_64-unknown-linux-gnu \
       --llvm-root=/usr/lib/llvm-20 \
       --enable-llvm-link-shared \
+      --set build.lldb=lldb-20 \
       --set rust.randomize-layout=true \
       --set rust.thin-lto-import-instr-limit=10
 

src/tools/compiletest/src/runtest/debuginfo.rs

@@ -448,13 +448,16 @@ impl TestCx<'_> {
         } else {
             self.config.lldb_python_dir.clone().unwrap()
         };
+
+        // DEBUGGING.
+        _ = pythonpath;
+
         self.run_command_to_procres(
             Command::new(&self.config.python)
                 .arg(&lldb_script_path)
                 .arg(test_executable)
                 .arg(debugger_script)
-                .env("PYTHONUNBUFFERED", "1") // Help debugging #78665
-                .env("PYTHONPATH", pythonpath),
+                .env("PYTHONUNBUFFERED", "1"), // Help debugging #78665
         )
     }