Auto merge of #106822 - matthiaskrgr:rollup-46bi4pi, r=matthiaskrgr

Rollup of 10 pull requests

Successful merges:

 - #104645 (Add log-backtrace option to show backtraces along with logging)
 - #106465 (Bump `IMPLIED_BOUNDS_ENTAILMENT` to Deny + ReportNow)
 - #106489 (Fix linker detection for linker (drivers) with a version postfix (e.g. clang-12 instead of clang))
 - #106585 (When suggesting writing a fully qualified path probe for appropriate types)
 - #106641 (Provide help on closures capturing self causing borrow checker errors)
 - #106678 (Warn when using panic-strategy abort for proc-macro crates)
 - #106701 (Fix `mpsc::SyncSender` spinning behavior)
 - #106793 (Normalize test output more thoroughly)
 - #106797 (riscv: Fix ELF header flags)
 - #106813 (Remove redundant session field)

Failed merges:

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

3 files changed, 12 insertions, 1 deletions

diff --git a/compiler/rustc_interface/src/errors.rs b/compiler/rustc_interface/src/errors.rs
index f5135c78dc8..15d7e977bbe 100644
--- a/compiler/rustc_interface/src/errors.rs
+++ b/compiler/rustc_interface/src/errors.rs
@@ -87,3 +87,7 @@ pub struct FailedWritingFile<'a> {
     pub path: &'a Path,
     pub error: io::Error,
 }
+
+#[derive(Diagnostic)]
+#[diag(interface_proc_macro_crate_panic_abort)]
+pub struct ProcMacroCratePanicAbort;
diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs
index 2a6852d44eb..50c40206d80 100644
--- a/compiler/rustc_interface/src/passes.rs
+++ b/compiler/rustc_interface/src/passes.rs
@@ -1,7 +1,8 @@
 use crate::errors::{
     CantEmitMIR, EmojiIdentifier, ErrorWritingDependencies, FerrisIdentifier,
     GeneratedFileConflictsWithDirectory, InputFileWouldBeOverWritten, MixedBinCrate,
-    MixedProcMacroCrate, OutDirError, ProcMacroDocWithoutArg, TempsDirError,
+    MixedProcMacroCrate, OutDirError, ProcMacroCratePanicAbort, ProcMacroDocWithoutArg,
+    TempsDirError,
 };
 use crate::interface::{Compiler, Result};
 use crate::proc_macro_decls;
@@ -36,6 +37,7 @@ use rustc_session::search_paths::PathKind;
 use rustc_session::{Limit, Session};
 use rustc_span::symbol::{sym, Symbol};
 use rustc_span::FileName;
+use rustc_target::spec::PanicStrategy;
 use rustc_trait_selection::traits;
 
 use std::any::Any;
@@ -380,6 +382,10 @@ pub fn configure_and_expand(
         }
     }
 
+    if is_proc_macro_crate && sess.panic_strategy() == PanicStrategy::Abort {
+        sess.emit_warning(ProcMacroCratePanicAbort);
+    }
+
     // For backwards compatibility, we don't try to run proc macro injection
     // if rustdoc is run on a proc macro crate without '--crate-type proc-macro' being
     // specified. This should only affect users who manually invoke 'rustdoc', as
diff --git a/compiler/rustc_interface/src/tests.rs b/compiler/rustc_interface/src/tests.rs
index a3b9891ee64..07b28cc86ce 100644
--- a/compiler/rustc_interface/src/tests.rs
+++ b/compiler/rustc_interface/src/tests.rs
@@ -748,6 +748,7 @@ fn test_unstable_options_tracking_hash() {
     tracked!(link_only, true);
     tracked!(llvm_plugins, vec![String::from("plugin_name")]);
     tracked!(location_detail, LocationDetail { file: true, line: false, column: false });
+    tracked!(log_backtrace, Some("filter".to_string()));
     tracked!(maximal_hir_to_mir_coverage, true);
     tracked!(merge_functions, Some(MergeFunctions::Disabled));
     tracked!(mir_emit_retag, true);