From eb089a1c9884b39d5a2fbfd449e183661fa51e88 Mon Sep 17 00:00:00 2001
From: Laytan <laytanlaats@hotmail.com>
Date: Sun, 16 Nov 2025 15:06:30 +0100
Subject: [PATCH] skip collision panic when package names aren't unique

---
 src/checker.cpp | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/checker.cpp b/src/checker.cpp
index 1daacd9ce..235d4def9 100644
--- a/src/checker.cpp
+++ b/src/checker.cpp
@@ -7031,9 +7031,11 @@ gb_internal void check_objc_context_provider_procedures(Checker *c) {
 	}
 }
 
-gb_internal void check_unique_package_names(Checker *c) {
+gb_internal bool check_unique_package_names(Checker *c) {
 	ERROR_BLOCK();
 
+	bool ok = true;
+
 	StringMap<AstPackage *> pkgs = {}; // Key: package name
 	string_map_init(&pkgs, 2*c->info.packages.count);
 	defer (string_map_destroy(&pkgs));
@@ -7058,6 +7060,7 @@ gb_internal void check_unique_package_names(Checker *c) {
 			continue;
 		}
 
+		ok = false;
 
 		begin_error_block();
 		error(curr, "Duplicate declaration of 'package %.*s'", LIT(name));
@@ -7080,6 +7083,8 @@ gb_internal void check_unique_package_names(Checker *c) {
 
 		end_error_block();
 	}
+
+	return ok;
 }
 
 gb_internal void check_add_entities_from_queues(Checker *c) {
@@ -7462,7 +7467,7 @@ gb_internal void check_parsed_files(Checker *c) {
 	debugf("Total Procedure Bodies Checked: %td\n", total_bodies_checked.load(std::memory_order_relaxed));
 
 	TIME_SECTION("check unique package names");
-	check_unique_package_names(c);
+	bool package_names_are_unique = check_unique_package_names(c);
 
 	TIME_SECTION("sanity checks");
 	check_merge_queues_into_arrays(c);
@@ -7519,7 +7524,8 @@ gb_internal void check_parsed_files(Checker *c) {
 			c->info.type_info_types_hash_map[index] = tt;
 
 			bool exists = map_set_if_not_previously_exists(&c->info.min_dep_type_info_index_map, tt.hash, index);
-			if (exists) {
+			// Because we've already written a nice error about a duplicate package declaration, skip this panic if the package names aren't unique.
+			if (package_names_are_unique && exists) {
 				for (auto const &entry : c->info.min_dep_type_info_index_map) {
 					if (entry.key != tt.hash) {
 						continue;