From b994a0ab136ddf67305626e3474ebd09661539c1 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Fri, 29 Nov 2019 06:17:29 -0800
Subject: [PATCH] Fix handling of missing fraction in snprintf_float

---
 include/fmt/format-inl.h | 8 ++++----
 test/format-test.cc      | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/fmt/format-inl.h b/include/fmt/format-inl.h
index 6d45df7f..9c8e0816 100644
--- a/include/fmt/format-inl.h
+++ b/include/fmt/format-inl.h
@@ -1198,17 +1198,17 @@ int snprintf_float(T value, int precision, float_specs specs,
       exp = exp * 10 + (*p++ - '0');
     } while (p != end);
     if (sign == '-') exp = -exp;
+    int fraction_size = 0;
     if (exp_pos != begin + 1) {
       // Remove trailing zeros.
       auto fraction_end = exp_pos - 1;
       while (*fraction_end == '0') --fraction_end;
       // Move the fractional part left to get rid of the decimal point.
-      int fraction_size = static_cast<int>(fraction_end - begin - 1);
+      fraction_size = static_cast<int>(fraction_end - begin - 1);
       std::memmove(begin + 1, begin + 2, fraction_size);
-      buf.resize(fraction_size + offset + 1);
-      exp -= fraction_size;
     }
-    return exp;
+    buf.resize(fraction_size + offset + 1);
+    return exp - fraction_size;
   }
 }
 }  // namespace internal
diff --git a/test/format-test.cc b/test/format-test.cc
index e747a407..84c9d8a0 100644
--- a/test/format-test.cc
+++ b/test/format-test.cc
@@ -1203,6 +1203,7 @@ TEST(FormatterTest, Precision) {
   EXPECT_EQ("1.2", format("{0:.2}", 1.2345));
   EXPECT_EQ("1.2", format("{0:.2}", 1.2345l));
   EXPECT_EQ("1.2e+56", format("{:.2}", 1.234e56));
+  EXPECT_EQ("1e+00", format("{:.0e}", 1.0L));
   EXPECT_EQ(
       "4.9406564584124654417656879286822137236505980261432476442558568250067550"
       "727020875186529983636163599237979656469544571773092665671035593979639877"