first new error

gistfile1.txt

MCS     [basic] mscorlib.dll
../../../external/corefx/src/Common/src/CoreLib/System/Collections/Generic/Dictionary.cs(231,22): warning CS0219: The variable `modified' is assigned but its value is never used
../../../external/corefx/src/Common/src/CoreLib/System/Collections/Generic/Dictionary.cs(240,18): warning CS0219: The variable `modified' is assigned but its value is never used
../../../external/corefx/src/Common/src/CoreLib/System/Collections/Generic/List.cs(950,21): warning CS0219: The variable `i' is assigned but its value is never used
../../../external/corefx/src/Common/src/CoreLib/System/Number.Formatting.cs(2125,17): warning CS0219: The variable `i' is assigned but its value is never used
../../../external/corefx/src/Common/src/CoreLib/System/Runtime/InteropServices/MemoryMarshal.cs(70,22): warning CS0219: The variable `localManager' is assigned but its value is never used
../../../external/corefx/src/Common/src/CoreLib/System/Runtime/InteropServices/MemoryMarshal.cs(89,22): warning CS0219: The variable `localManager' is assigned but its value is never used
../../../external/corefx/src/Common/src/CoreLib/System/Text/StringBuilder.cs(1760,17): warning CS0219: The variable `deltaLength' is assigned but its value is never used
../../../external/corefx/src/Common/src/CoreLib/System/Text/StringBuilder.cs(1798,25): warning CS0219: The variable `indexBeforeAdjustment' is assigned but its value is never used
../../../external/corefx/src/System.Memory/src/System/Buffers/Text/Utf8Formatter/Utf8Formatter.Date.G.cs(42,19): warning CS0219: The variable `unused' is assigned but its value is never used
../../../external/corefx/src/System.Memory/src/System/Buffers/Text/Utf8Formatter/Utf8Formatter.Date.O.cs(52,19): warning CS0219: The variable `unused' is assigned but its value is never used
../../../external/corefx/src/System.Memory/src/System/Buffers/Text/Utf8Formatter/Utf8Formatter.Guid.cs(120,19): warning CS0219: The variable `unused' is assigned but its value is never used
../../../external/corefx/src/System.Memory/src/System/Buffers/Text/Utf8Formatter/Utf8Formatter.Guid.cs(136,19): warning CS0219: The variable `unused' is assigned but its value is never used
../../../external/corefx/src/System.Memory/src/System/Buffers/Text/Utf8Formatter/Utf8Formatter.Guid.cs(150,19): warning CS0219: The variable `unused' is assigned but its value is never used
../../../external/corefx/src/System.Memory/src/System/Buffers/Text/Utf8Formatter/Utf8Formatter.Guid.cs(164,19): warning CS0219: The variable `unused' is assigned but its value is never used
../../../external/corefx/src/System.Memory/src/System/Buffers/Text/Utf8Formatter/Utf8Formatter.Guid.cs(178,19): warning CS0219: The variable `unused' is assigned but its value is never used
../../../external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/FutureFactory.cs(551,26): warning CS0219: The variable `bWonSetException' is assigned but its value is never used
../../../external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/TaskScheduler.cs(384,53): warning CS0420: `System.Threading.Tasks.TaskScheduler.m_taskSchedulerId': A volatile field references will not be treated as volatile
System.Diagnostics.Tracing/EventSource.cs(161,15): warning CS3006: Overloaded method `System.Diagnostics.Tracing.EventSource.Write<T>(string, ref System.Diagnostics.Tracing.EventSourceOptions, ref T)' differing only in ref or out, or in array rank, is not CLS-compliant
System.Diagnostics.Tracing/EventSource.cs(156,15): (Location of the symbol related to previous warning)
corert/Decimal.cs(684,32): warning CS3006: Overloaded method `System.Decimal.Round(ref decimal, int, System.MidpointRounding)' differing only in ref or out, or in array rank, is not CLS-compliant
corert/Decimal.cs(682,31): (Location of the symbol related to previous warning)
corert/Decimal.cs(892,29): warning CS3006: Overloaded method `System.Decimal.Truncate(ref decimal)' differing only in ref or out, or in array rank, is not CLS-compliant
corert/Decimal.cs(885,31): (Location of the symbol related to previous warning)
../../../external/corefx/src/Common/src/CoreLib/System/Boolean.cs(29,22): warning CS0649: Field `System.Boolean.m_value' is never assigned to, and will always have its default value `false'
../../../external/corefx/src/System.Collections.NonGeneric/src/System/Collections/KeyValuePairs.cs(22,33): warning CS0414: The private field `System.Collections.KeyValuePairs._key' is assigned but its value is never used
../../../external/corefx/src/System.Collections.NonGeneric/src/System/Collections/KeyValuePairs.cs(25,33): warning CS0414: The private field `System.Collections.KeyValuePairs._value' is assigned but its value is never used
Compilation succeeded - 23 warning(s)

Unhandled Exception:
System.ArgumentException: parsing "^(?<flag>--|-|/)(?<name>[^:=]+)((?<sep>[:=])(?<value>.*))?$" - Invalid group name: Group names must begin with a word character.
  at System.Text.RegularExpressions.RegexParser.ScanGroupOpen () [0x00229] in <a906101b128e42548210c6ff25a3096c>:0
  at System.Text.RegularExpressions.RegexParser.ScanRegex () [0x001aa] in <a906101b128e42548210c6ff25a3096c>:0
  at System.Text.RegularExpressions.RegexParser.Parse (System.String re, System.Text.RegularExpressions.RegexOptions op) [0x00036] in <a906101b128e42548210c6ff25a3096c>:0
  at System.Text.RegularExpressions.Regex..ctor (System.String pattern, System.Text.RegularExpressions.RegexOptions options, System.TimeSpan matchTimeout, System.Boolean addToCache) [0x00097] in <a906101b128e42548210c6ff25a3096c>:0
  at System.Text.RegularExpressions.Regex..ctor (System.String pattern) [0x00000] in <a906101b128e42548210c6ff25a3096c>:0
  at Mono.Options.OptionSet..ctor (System.Converter`2[TInput,TOutput] localizer) [0x0000b] in <414bbd5b618b4b24a8858aaca22bc9da>:0
  at Mono.Options.OptionSet..ctor () [0x00000] in <414bbd5b618b4b24a8858aaca22bc9da>:0
  at Program.Main (System.String[] args) [0x00011] in <414bbd5b618b4b24a8858aaca22bc9da>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentException: parsing "^(?<flag>--|-|/)(?<name>[^:=]+)((?<sep>[:=])(?<value>.*))?$" - Invalid group name: Group names must begin with a word character.
  at System.Text.RegularExpressions.RegexParser.ScanGroupOpen () [0x00229] in <a906101b128e42548210c6ff25a3096c>:0
  at System.Text.RegularExpressions.RegexParser.ScanRegex () [0x001aa] in <a906101b128e42548210c6ff25a3096c>:0
  at System.Text.RegularExpressions.RegexParser.Parse (System.String re, System.Text.RegularExpressions.RegexOptions op) [0x00036] in <a906101b128e42548210c6ff25a3096c>:0
  at System.Text.RegularExpressions.Regex..ctor (System.String pattern, System.Text.RegularExpressions.RegexOptions options, System.TimeSpan matchTimeout, System.Boolean addToCache) [0x00097] in <a906101b128e42548210c6ff25a3096c>:0
  at System.Text.RegularExpressions.Regex..ctor (System.String pattern) [0x00000] in <a906101b128e42548210c6ff25a3096c>:0
  at Mono.Options.OptionSet..ctor (System.Converter`2[TInput,TOutput] localizer) [0x0000b] in <414bbd5b618b4b24a8858aaca22bc9da>:0
  at Mono.Options.OptionSet..ctor () [0x00000] in <414bbd5b618b4b24a8858aaca22bc9da>:0
  at Program.Main (System.String[] args) [0x00011] in <414bbd5b618b4b24a8858aaca22bc9da>:0
../../build/library.make:352: recipe for target '../../class/lib/basic/mscorlib.dll' failed
gmake[8]: *** [../../class/lib/basic/mscorlib.dll] Error 1