7 files changed, 61 insertions, 1 deletions
diff --git a/tests/errors/use_after_free_borrow.zc b/tests/errors/use_after_free_borrow.zc
new file mode 100644
index 0000000..ed4e9d3
--- /dev/null
+++ b/tests/errors/use_after_free_borrow.zc
@@ -0,0 +1,10 @@
+namespace;
+include rt;
+
+// expect: r: used after it was given away; r borrows t, and t was freed on line 8 (t declared on line 6)
+fn main() {
+	char* t = rt.new(4); t[0] = 65;
+	char* r = t + 1;
+	rt.free(t);
+	return r[0];
+}
diff --git a/tests/errors/use_after_free_owner.zc b/tests/errors/use_after_free_owner.zc
new file mode 100644
index 0000000..e530bf5
--- /dev/null
+++ b/tests/errors/use_after_free_owner.zc
@@ -0,0 +1,9 @@
+namespace;
+include rt;
+
+// expect: t: used after it was given away; t was freed on line 7 (declared on line 6)
+fn main() {
+	let t = rt.new(4);
+	rt.free(t);
+	return t[0];
+}
diff --git a/tests/errors/use_after_global.zc b/tests/errors/use_after_global.zc
new file mode 100644
index 0000000..01a69c0
--- /dev/null
+++ b/tests/errors/use_after_global.zc
@@ -0,0 +1,10 @@
+namespace;
+include rt;
+
+// expect: a: used after it was given away; a was stored in a global or untracked memory on line 8 (declared on line 7)
+word g;
+fn main() {
+	let a = rt.new(4);
+	g = a;
+	return a[0];
+}
diff --git a/tests/errors/use_after_inferred_give.zc b/tests/errors/use_after_inferred_give.zc
index 19841cb..e393c29 100644
--- a/tests/errors/use_after_inferred_give.zc
+++ b/tests/errors/use_after_inferred_give.zc
@@ -1,6 +1,6 @@
 namespace;
 include rt;
 
-// expect: x: used after it was given away; owner x was transferred on line 6 (declared on line 6)
+// expect: x: used after it was given away; x was given to take's .d parameter on line 6 (declared on line 6)
 fn take(.d p) { return p[0]; }
 fn main() { let x = rt.new(3); take(x); return x[0]; }
diff --git a/tests/errors/use_after_move.zc b/tests/errors/use_after_move.zc
new file mode 100644
index 0000000..a5a9abb
--- /dev/null
+++ b/tests/errors/use_after_move.zc
@@ -0,0 +1,11 @@
+namespace;
+include rt;
+
+// expect: a: used after it was given away; a was moved into b on line 9 (declared on line 6)
+fn main() {
+	let a = rt.new(4);
+	let b = rt.new(4);
+	rt.free(b);
+	b = a;
+	return a[0] + b[0];
+}
diff --git a/tests/errors/use_after_push.zc b/tests/errors/use_after_push.zc
new file mode 100644
index 0000000..a4baf69
--- /dev/null
+++ b/tests/errors/use_after_push.zc
@@ -0,0 +1,10 @@
+namespace;
+include rt;
+
+// expect: a: used after it was given away; a was pushed into an array on line 8 (declared on line 7)
+fn main() {
+	word[?] items = rt.new(word[?]);
+	let a = rt.new(4);
+	push(items, a);
+	return a[0];
+}
diff --git a/tests/errors/use_after_reassign.zc b/tests/errors/use_after_reassign.zc
new file mode 100644
index 0000000..a295591
--- /dev/null
+++ b/tests/errors/use_after_reassign.zc
@@ -0,0 +1,10 @@
+namespace;
+include rt;
+
+// expect: r: used after it was given away; r borrows a, and a was freed by reassigning it on line 8 (a declared on line 6)
+fn main() {
+	let a = rt.new(4);
+	char* r = a + 1;
+	a = rt.new(4);
+	return r[0];
+}