From 79bf53aaa5f0ca10b327a0ff6ee62aa61b530cce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20H=C3=B8rl=C3=BCck=20Berg?=
 <36937807+henrikhorluck@users.noreply.github.com>
Date: Sun, 24 May 2026 13:49:21 +0200
Subject: [PATCH] Fix `Principal topic monitor not initialized` panic

Like 1b16d318cc2b75e6973ec99718d2381d11edc1dd, reproduces with `cargo test test_pthread`

Fix by using stdlib `println!` to avoid interacting with topicMonitor.

Enable `allow-print-in-tests` like with crates/printf, such that there i
no deny-warning.
---
 Cargo.toml             | 2 ++
 clippy.toml            | 1 +
 src/threads/threads.rs | 6 +++---
 3 files changed, 6 insertions(+), 3 deletions(-)
 create mode 100644 clippy.toml

diff --git a/Cargo.toml b/Cargo.toml
index 23a36e14d..478b2c9cd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -233,6 +233,8 @@ unused_trait_names = "warn"
 # In the future, they might change to flag other methods of printing.
 print_stdout = "deny"
 print_stderr = "deny"
+# usage in tests is fine since it avoids interacting with TopicMonitor
+# and is configured in clippy.toml with `allow-print-in-tests`
 
 [lints]
 workspace = true
diff --git a/clippy.toml b/clippy.toml
new file mode 100644
index 000000000..40b1dda5b
--- /dev/null
+++ b/clippy.toml
@@ -0,0 +1 @@
+allow-print-in-tests = true
diff --git a/src/threads/threads.rs b/src/threads/threads.rs
index 897d0004b..095958556 100644
--- a/src/threads/threads.rs
+++ b/src/threads/threads.rs
@@ -458,7 +458,7 @@ struct Context {
         let made = spawn(move || {
             ctx2.val.fetch_add(2, Ordering::Release);
             ctx2.condvar.notify_one();
-            printf!("condvar signalled\n");
+            println!("condvar signalled");
         });
         assert!(made);
 
@@ -466,9 +466,9 @@ struct Context {
         let (_lock, timeout) = ctx
             .condvar
             .wait_timeout_while(lock, Duration::from_secs(5), |()| {
-                printf!("looping with lock held\n");
+                println!("looping with lock held");
                 if ctx.val.load(Ordering::Acquire) != 5 {
-                    printf!("test_pthread: value did not yet reach goal\n");
+                    println!("test_pthread: value did not yet reach goal");
                     return true;
                 }
                 false