#5305: reject numbers outside long range in number.as-i64 instead of saturating

Author: morphqdd

eo-runtime/src/main/eo/number.eo

@@ -1455,5 +1455,10 @@
   # Tests that NaN is not a finite value.
   nan.is-finite.not > [] +> nan-is-not-finite
 
+  # Tests that converting a number far outside i64 range to i64 throws an error,
+  # instead of silently saturating to Long.MAX_VALUE.
+  [] +> throws-on-converting-huge-number-to-i64
+    1.0e30.as-i64 > @
+
   # Tests that NaN is not an integer.
   nan.is-integer.not > [] +> nan-is-not-integer

eo-runtime/src/main/java/org/eolang/EOnumber$EOas_i64.java

@@ -25,7 +25,13 @@ public Phi lambda() {
             0,
             new Data.ToPhi(
                 new BytesOf(
-                    new Expect.Number(Expect.at(this, Phi.RHO)).it().longValue()
+                    Expect.at(this, Phi.RHO)
+                        .that(phi -> new Dataized(phi).asNumber())
+                        .otherwise("must be a number")
+                        .must(number -> number >= Long.MIN_VALUE && number <= Long.MAX_VALUE)
+                        .otherwise("must fit into long range")
+                        .that(Double::longValue)
+                        .it()
                 ).take()
             )
         );