Do not render ascii colors to buffers

diff --git a/src/librustc/session/mod.rs b/src/librustc/session/mod.rs
index 6a0e5d984789f7048d495dbb5bf85166c2d3a3e3..3711bd9fd7de4471c24ed5ea10cd7edb7f4baa0c 100644 (file)
--- a/src/librustc/session/mod.rs
+++ b/src/librustc/session/mod.rs
@@ -1050,8 +1050,8 @@ fn default_emitter(
                     dst,
                     Some(source_map.clone()),
                     short,
-                    false,
-                    color_config.suggests_using_colors(),
+                    false, // no teach messages when writing to a buffer
+                    false, // no colors when writing to a buffer
                 ),
             };
             Box::new(emitter.ui_testing(sopts.debugging_opts.ui_testing))

diff --git a/src/librustc_errors/emitter.rs b/src/librustc_errors/emitter.rs
index 5ba17d12d93840f6f26cd2683957be9c6d4dba7e..a1472479afa89f001154453cfb3fa490e3a0ba39 100644 (file)
--- a/src/librustc_errors/emitter.rs
+++ b/src/librustc_errors/emitter.rs
@@ -146,7 +146,7 @@ fn to_color_choice(self) -> ColorChoice {
             ColorConfig::Auto => ColorChoice::Never,
         }
     }
-    pub fn suggests_using_colors(self) -> bool {
+    fn suggests_using_colors(self) -> bool {
         match self {
             | ColorConfig::Always
             | ColorConfig::Auto