https://bugzilla.novell.com/show_bug.cgi?id=435494
Summary: Parsing error "can't seek that far back" when parsing
function call with many arguments
Product: Mono: Compilers
Version: 1.9
Platform: Other
OS/Version: Ubuntu
Status: NEW
Severity: Critical
Priority: P5 - None
Component: C#
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
QAContact: [email protected]
Found By: Community User
Created an attachment (id=245557)
--> (https://bugzilla.novell.com/attachment.cgi?id=245557)
Code sample exhibiting error
Description of Problem:
Compilation of my project fails with a parsing error, even though there is no
error in the source file. I have attached an excerpt of my source file which
exhibits this when parsed from the command line.
Steps to reproduce the problem:
1. Execute the following command on attached mono_bug.cs:
$ MONO_OPTIONS="--debug" gmcs -v --parse mono_bug.cs
Actual Results:
Parsing fails with the following error:
/path/to/mono_bug.cs(47,70): error CS8025: Parsing error
Mono.CSharp.InternalErrorException: can't seek that far back: 1870
at Mono.CSharp.SeekableStreamReader.set_Position (Int32 value) [0x0004a] in
/build/buildd/mono-1.9.1+dfsg/mcs/mcs/support.cs:464
at Mono.CSharp.Tokenizer.PopPosition () [0x00011] in
/build/buildd/mono-1.9.1+dfsg/mcs/mcs/cs-tokenizer.cs:272
at Mono.CSharp.Tokenizer.is_punct (Char c, System.Boolean& doread) [0x000d6]
in /build/buildd/mono-1.9.1+dfsg/mcs/mcs/cs-tokenizer.cs:732
at Mono.CSharp.Tokenizer.xtoken () [0x002f3] in
/build/buildd/mono-1.9.1+dfsg/mcs/mcs/cs-tokenizer.cs:2440
at Mono.CSharp.Tokenizer.token () [0x00000] in
/build/buildd/mono-1.9.1+dfsg/mcs/mcs/cs-tokenizer.cs:1527
at Mono.CSharp.CSharpParser.yyparse (yyInput yyLex) [0x000c3] in
/build/buildd/mono-1.9.1+dfsg/mcs/mcs/cs-parser.cs:1143
at Mono.CSharp.CSharpParser.parse () [0x00028] in
/build/buildd/mono-1.9.1+dfsg/mcs/mcs/cs-parser.jay:5949
Compilation failed: 1 error(s), 0 warnings
Expected Results:
Parsing completes successfully.
How often does this happen?
Every time.
Additional Information:
This occurs with the following mono versions:
$ mono --version
Mono JIT compiler version 1.9.1 (tarball)
Copyright (C) 2002-2007 Novell, Inc and Contributors. www.mono-project.com
TLS: __thread
GC: Included Boehm (with typed GC)
SIGSEGV: altstack
Notifications: epoll
Architecture: x86
Disabled: none
$ gmcs --version
Mono C# compiler version 1.9.1.0
Mono was installed on Ubuntu from the directhex.mfgames.com repository:
deb http://directhex.mfgames.com/ hardy main
I tested this same example file on Mono 1.2.6 on Ubuntu and could not reproduce
the error. I did not test with the most recent SVN.
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