From 955ee6477f4b1d3a70bfe97a1e7727848bf2d06d Mon Sep 17 00:00:00 2001
From: Damien George
Date: Thu, 1 Mar 2018 17:00:02 +1100
Subject: py/formatfloat: Fix case where floats could render with negative
 digits.

Prior to this patch, some architectures (eg unix x86) could render floats
with "negative" digits, like ")".  For example, '%.23e' % 1e-80 would come
out as "1.0000000000000000/)/(,*0e-80".  This patch fixes the known cases.
---
 tests/float/float_format.py | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'tests/float/float_format.py')

diff --git a/tests/float/float_format.py b/tests/float/float_format.py
index cda395ce0..d43535cf2 100644
--- a/tests/float/float_format.py
+++ b/tests/float/float_format.py
@@ -13,3 +13,7 @@ for prec in range(8):
 # check certain cases that had a digit value of 10 render as a ":" character
 print('%.2e' % float('9' * 51 + 'e-39'))
 print('%.2e' % float('9' * 40 + 'e-21'))
+
+# check a case that would render negative digit values, eg ")" characters
+# the string is converted back to a float to check for no illegal characters
+float('%.23e' % 1e-80)
-- 
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