From 2161f0540f920b946454fba4928814a2cba1feb6 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Wed, 3 Oct 2018 22:23:48 -0700
Subject: [PATCH] Fix overflow on i32::min_value() as exponent

---
 src/de.rs     | 2 +-
 tests/test.rs | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/de.rs b/src/de.rs
index 70ebf0d..020869a 100644
--- a/src/de.rs
+++ b/src/de.rs
@@ -676,7 +676,7 @@ impl<'de, R: Read<'de>> Deserializer<R> {
     ) -> Result<f64> {
         let mut f = significand as f64;
         loop {
-            match POW10.get(exponent.abs() as usize) {
+            match POW10.get(exponent.wrapping_abs() as usize) {
                 Some(&pow) => {
                     if exponent >= 0 {
                         f *= pow;
diff --git a/tests/test.rs b/tests/test.rs
index 954ac90..688dfe5 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -860,6 +860,7 @@ fn test_parse_f64() {
         ("0.00e00", 0.0),
         ("0.00e+00", 0.0),
         ("0.00e-00", 0.0),
+        ("3.5E-2147483647", 0.0),
         (
             &format!("{}", (i64::MIN as f64) - 1.0),
             (i64::MIN as f64) - 1.0,