Auto merge of #79065 - Dylan-DPC:rollup-gag1drk, r=Dylan-DPC

Rollup of 15 pull requests

Successful merges:

 - #78352 (Do not call `unwrap` with `signatures` option enabled)
 - #78590 (refactor: removing alloc::collections::vec_deque ignore-tidy-filelength)
 - #78848 (Bump minimal supported LLVM version to 9)
 - #78856 (Explicitly checking for or-pattern before test)
 - #78948 (test: add `()=()=()=...` to weird-exprs.rs)
 - #78962 (Add a test for r# identifiers)
 - #78963 (Added some unit tests as requested)
 - #78966 (Never inline C variadics, cold functions, functions with incompatible attributes ...)
 - #78968 (Include llvm-as in llvm-tools-preview component)
 - #78969 (Normalize function type during validation)
 - #78980 (Fix rustc_ast_pretty print_qpath resulting in invalid macro input)
 - #78986 (Avoid installing external LLVM dylibs)
 - #78988 (Fix an intrinsic invocation on threaded wasm)
 - #78993 (rustc_target: Fix dash vs underscore mismatches in option names)
 - #79013 (Clean up outdated `use_once_payload` pretty printer comment)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 4 insertions, 1 deletions

diff --git a/compiler/rustc_mir/src/transform/coverage/mod.rs b/compiler/rustc_mir/src/transform/coverage/mod.rs
index c55349239b0..192bb6680e4 100644
--- a/compiler/rustc_mir/src/transform/coverage/mod.rs
+++ b/compiler/rustc_mir/src/transform/coverage/mod.rs
@@ -5,6 +5,9 @@ mod debug;
 mod graph;
 mod spans;
 
+#[cfg(test)]
+mod tests;
+
 use counters::CoverageCounters;
 use graph::{BasicCoverageBlock, BasicCoverageBlockData, CoverageGraph};
 use spans::{CoverageSpan, CoverageSpans};
@@ -31,7 +34,7 @@ use rustc_span::{CharPos, Pos, SourceFile, Span, Symbol};
 
 /// A simple error message wrapper for `coverage::Error`s.
 #[derive(Debug)]
-pub(crate) struct Error {
+struct Error {
     message: String,
 }