numfmt: prevent panic if float precision specifier > 65535 (uutils#12600)

Devel08 · web-flow · commit bd9f32f7aed2 · 2026-06-04T17:03:36.000+02:00
diff --git a/src/uu/numfmt/src/format.rs b/src/uu/numfmt/src/format.rs
@@ -628,7 +628,7 @@ fn transform_to(
             "{:.precision$}",
             round_with_precision(i2, round_method, precision),
         )),
-        None if is_precision_specified => {
+        None if is_precision_specified && precision <= u16::MAX.into() => {
             let i2 = round_with_precision(i2, round_method, 0);
             localize(format!("{i2:.precision$}"))
         }
diff --git a/tests/by-util/test_numfmt.rs b/tests/by-util/test_numfmt.rs
@@ -1627,3 +1627,11 @@ fn test_multibyte_suffix_issue11937() {
         .succeeds()
         .stdout_is("   692.00€\n");
 }
+
+#[test]
+fn test_float_precision_greater_than_16bits() {
+    new_ucmd!()
+        .args(&["--to=iec", "--format=%.65536f", "1"])
+        .succeeds()
+        .stdout_is("1\n");
+}

Original file line number	Diff line number	Diff line change
`@@ -628,7 +628,7 @@ fn transform_to(`
`628`	`628`	`"{:.precision$}",`
`629`	`629`	`round_with_precision(i2, round_method, precision),`
`630`	`630`	`)),`
`631`		`- None if is_precision_specified => {`
	`631`	`+ None if is_precision_specified && precision <= u16::MAX.into() => {`
`632`	`632`	`let i2 = round_with_precision(i2, round_method, 0);`
`633`	`633`	`localize(format!("{i2:.precision$}"))`
`634`	`634`	`}`