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Fix bug where tostring("-") evaluates to zero instead of nil. #72

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technomancy wants to merge 1 commits from tostring-dash into master
pull from: tostring-dash
merge into: open-autonomous-connection:master
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src/core/org/luaj/vm2/LuaString.java
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@@ -794,6 +794,10 @@ public class LuaString extends LuaValue {
private double scanlong( int base, int start, int end ) { private double scanlong( int base, int start, int end ) {
long x = 0; long x = 0;
boolean neg = (m_bytes[start] == '-'); boolean neg = (m_bytes[start] == '-');
if(neg && m_bytes.length == 1) {
// this is only a '-' sign, no parsing any number is required
return Double.NaN;
}
for ( int i=(neg?start+1:start); i<end; i++ ) { for ( int i=(neg?start+1:start); i<end; i++ ) {
int digit = m_bytes[i] - (base<=10||(m_bytes[i]>='0'&&m_bytes[i]<='9')? '0': int digit = m_bytes[i] - (base<=10||(m_bytes[i]>='0'&&m_bytes[i]<='9')? '0':
m_bytes[i]>='A'&&m_bytes[i]<='Z'? ('A'-10): ('a'-10)); m_bytes[i]>='A'&&m_bytes[i]<='Z'? ('A'-10): ('a'-10));