2 files changed, 36 insertions, 0 deletions
diff --git a/tests/ui/extenv/issue-110547.rs b/tests/ui/extenv/issue-110547.rs
new file mode 100644
index 00000000000..a6fb96ac066
--- /dev/null
+++ b/tests/ui/extenv/issue-110547.rs
@@ -0,0 +1,7 @@
+// compile-flags: -C debug-assertions
+
+fn main() {
+    env!{"\t"}; //~ ERROR not defined at compile time
+    env!("\t"); //~ ERROR not defined at compile time
+    env!("\u{2069}"); //~ ERROR not defined at compile time
+}
diff --git a/tests/ui/extenv/issue-110547.stderr b/tests/ui/extenv/issue-110547.stderr
new file mode 100644
index 00000000000..1219630d346
--- /dev/null
+++ b/tests/ui/extenv/issue-110547.stderr
@@ -0,0 +1,29 @@
+error: environment variable `    ` not defined at compile time
+  --> $DIR/issue-110547.rs:4:5
+   |
+LL |     env!{"\t"};
+   |     ^^^^^^^^^^
+   |
+   = help: use `std::env::var("    ")` to read the variable at run time
+   = note: this error originates in the macro `env` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: environment variable `    ` not defined at compile time
+  --> $DIR/issue-110547.rs:5:5
+   |
+LL |     env!("\t");
+   |     ^^^^^^^^^^
+   |
+   = help: use `std::env::var("    ")` to read the variable at run time
+   = note: this error originates in the macro `env` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: environment variable `` not defined at compile time
+  --> $DIR/issue-110547.rs:6:5
+   |
+LL |     env!("\u{2069}");
+   |     ^^^^^^^^^^^^^^^^
+   |
+   = help: use `std::env::var("")` to read the variable at run time
+   = note: this error originates in the macro `env` (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error: aborting due to 3 previous errors
+