From bef46a47efe363bc6a42577904f72ca8ac4b1051 Mon Sep 17 00:00:00 2001
From: Jonas Wanke <contact@jonas-wanke.com>
Date: Thu, 14 Mar 2024 17:48:48 +0100
Subject: [PATCH 1/4] Rename id_path.is_empty() to .is_root()

---
 compiler/frontend/src/hir.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/compiler/frontend/src/hir.rs b/compiler/frontend/src/hir.rs
index 67ab9c201..89e7b1c51 100644
--- a/compiler/frontend/src/hir.rs
+++ b/compiler/frontend/src/hir.rs
@@ -144,13 +144,14 @@ pub enum IdKey {
     Positional(usize),
 }
 impl IdPath {
-    fn is_empty(&self) -> bool {
+    #[must_use]
+    fn is_root(&self) -> bool {
         self.0.is_empty()
     }
 
     #[must_use]
     fn child(&self, key: IdKey) -> Self {
-        if self.is_empty() {
+        if self.is_root() {
             Self::from(key)
         } else {
             Self(format!("{}:{key}", self.0))
@@ -255,7 +256,7 @@ impl Id {
 
     #[must_use]
     pub fn is_root(&self) -> bool {
-        self.keys.is_empty()
+        self.keys.is_root()
     }
 
     #[must_use]

From 5607c832fcf81917ea59e0a7f32a2aaa4cc2abc3 Mon Sep 17 00:00:00 2001
From: Jonas Wanke <contact@jonas-wanke.com>
Date: Thu, 14 Mar 2024 17:49:06 +0100
Subject: [PATCH 2/4] Fix id_path.parent() of top-level HIR ID

---
 compiler/frontend/src/hir.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/compiler/frontend/src/hir.rs b/compiler/frontend/src/hir.rs
index 89e7b1c51..d76f0a726 100644
--- a/compiler/frontend/src/hir.rs
+++ b/compiler/frontend/src/hir.rs
@@ -165,7 +165,16 @@ impl IdPath {
 
     #[must_use]
     fn parent(&self) -> Option<Self> {
-        self.0.rfind(':').map(|i| Self(self.0[..i].to_string()))
+        self.0
+            .rfind(':')
+            .map(|i| Self(self.0[..i].to_string()))
+            .or_else(|| {
+                if self.is_root() {
+                    None
+                } else {
+                    Some(Self::default())
+                }
+            })
     }
 }
 impl From<IdKey> for IdPath {

From 6402e49a111742d4e209c6b48b7378ea25be0ec8 Mon Sep 17 00:00:00 2001
From: Jonas Wanke <contact@jonas-wanke.com>
Date: Thu, 14 Mar 2024 17:54:51 +0100
Subject: [PATCH 3/4] Re-add limited debug information in release builds
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This re-adds file and line number information to backtraces while only increasing the executable's file size from 15 MB to 76 MB (compared to around 170 MB with full debug information).
---
 Cargo.toml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index 78eb4f7d7..f1a82a8ee 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,3 +15,6 @@ members = [
 [workspace.package]
 edition = "2021"
 rust-version = "1.78.0"
+
+[profile.release]
+debug = "limited"

From 1cc3fb6a11b0fc1118488e507a2edff0851f5fad Mon Sep 17 00:00:00 2001
From: Jonas Wanke <contact@jonas-wanke.com>
Date: Thu, 14 Mar 2024 17:58:27 +0100
Subject: [PATCH 4/4] Add debug information comment

---
 Cargo.toml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index f1a82a8ee..1d8eebcb3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,4 +17,7 @@ edition = "2021"
 rust-version = "1.78.0"
 
 [profile.release]
+# This adds file and line number information to backtraces while only increasing
+# the executable's file size from 15 MB to 76 MB (compared to around 170 MB with
+# full debug information).
 debug = "limited"