Don't discard value names when using address or memory sanitizer

The value names are used when reporting issues found by address
sanitizer or memory sanitizer. Avoid discarding names when those
sanitizers are enabled, unless explicitly requested to do otherwise.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/librustc/session/mod.rs b/src/librustc/session/mod.rs
index 9d60221fa3d..fa2902e4f0e 100644
--- a/src/librustc/session/mod.rs
+++ b/src/librustc/session/mod.rs
@@ -7,7 +7,7 @@ use rustc_data_structures::fingerprint::Fingerprint;
 
 use crate::lint;
 use crate::lint::builtin::BuiltinLintDiagnostics;
-use crate::session::config::{OutputType, PrintRequest, SwitchWithOptPath};
+use crate::session::config::{OutputType, PrintRequest, Sanitizer, SwitchWithOptPath};
 use crate::session::search_paths::{PathKind, SearchPath};
 use crate::util::nodemap::{FxHashMap, FxHashSet};
 use crate::util::common::{duration_to_secs_str, ErrorReported};
@@ -626,6 +626,14 @@ impl Session {
             .output_types
             .contains_key(&OutputType::LlvmAssembly)
             || self.opts.output_types.contains_key(&OutputType::Bitcode);
+
+        // Address sanitizer and memory sanitizer use alloca name when reporting an issue.
+        let more_names = match self.opts.debugging_opts.sanitizer {
+            Some(Sanitizer::Address) => true,
+            Some(Sanitizer::Memory) => true,
+            _ => more_names,
+        };
+
         self.opts.debugging_opts.fewer_names || !more_names
     }