• sanjayss (46/46) Feb 20 2016 I got the following exception on a line of code that is basically
• =?UTF-8?Q?Ali_=c3=87ehreli?= (10/22) Feb 20 2016 Judging frome the fact that the exception object does not contain a
• sanjayss (5/31) Feb 20 2016 Thanks. That helps. I am making the stdin non-blocking (but
• sanjayss (3/9) Feb 20 2016 Just doing a "stdin.clearerr()" after switching back from

sanjayss <dummy dummy.dummy> writes:

I got the following exception on a line of code that is basically 
"line = readln()" and need help in understanding what the 
exception is saying. (I am playing around with stdio prior to 
this using unix ioctls and maybe I am messing something up in the 
process resulting in this, but understanding the exception will 
give me a clue as to what I am doing wrong -- a basic D progam 
with readln() doesn't have the same issue). This is on linux with 
DMD version 2.07.

std.stdio.StdioException std/stdio.d(3969)
----------------
??:? void std.stdio.StdioException.opCall() [0x4c8891]
??:? ulong 
std.stdio.readlnImpl(shared(core.stdc.stdio._IO_FILE)*, ref 
char[], dchar, std.stdio.File.Orientation) [0x4c89e5]
/usr/include/dmd/phobos/std/stdio.d:1547 ulong 
std.stdio.File.readln!(char).readln(ref char[], dchar) [0x4acd95]
/usr/include/dmd/phobos/std/stdio.d:1408 immutable(char)[] 
std.stdio.File.readln!(immutable(char)[]).readln(dchar) [0x4acca2]
/usr/include/dmd/phobos/std/stdio.d:3377 immutable(char)[] 
std.stdio.readln!(immutable(char)[]).readln(dchar) [0x4acc2f]
telnetc.d:1572 void telnetc.handleEscapeMode(telnetc.TelnetInfo, 
ubyte) [0x4a6638]
telnetc.d:1591 void telnetc.handleKey(telnetc.TelnetInfo, ubyte) 
[0x4a6707]
telnetc.d:1603 void telnetc.handleKeyPress(telnetc.TelnetInfo, 
ubyte[]) [0x4a6788]
telnetc.d:1740 bool telnetc.readSocket!(void 
function(telnetc.TelnetInfo, ubyte[])*, 
telnetc.TelnetInfo).readSocket(immutable(char)[], 
std.socket.Socket, void function(telnetc.TelnetInfo, ubyte[])*, 
telnetc.TelnetInfo) [0x4adb18]
telnetc.d:1802 void 
telnetc.receiveAndProcessData(telnetc.TelnetInfo) [0x4a6f00]
telnetc.d:2165 _Dmain [0x4a7831]
??:? 
_D2rt6dmain211_d_run_mainUiPPaPUAAaZiZ6runAllMFZ9__lambda1MFZv 
[0x4b9742]
??:? void rt.dmain2._d_run_main(int, char**, extern (C) int 
function(char[][])*).tryExec(scope void delegate()) [0x4b9680]
??:? void rt.dmain2._d_run_main(int, char**, extern (C) int 
function(char[][])*).runAll() [0x4b96fe]
??:? void rt.dmain2._d_run_main(int, char**, extern (C) int 
function(char[][])*).tryExec(scope void delegate()) [0x4b9680]
??:? _d_run_main [0x4b95dd]
??:? main [0x4b3827]
??:? __libc_start_main [0xf762ec4]

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 02/20/2016 04:45 PM, sanjayss wrote:
 I got the following exception on a line of code that is basically "line
 = readln()" and need help in understanding what the exception is saying.
 (I am playing around with stdio prior to this using unix ioctls and
 maybe I am messing something up in the process resulting in this, but
 understanding the exception will give me a clue as to what I am doing
 wrong -- a basic D progam with readln() doesn't have the same issue).
 This is on linux with DMD version 2.07.

 std.stdio.StdioException std/stdio.d(3969)
 ----------------
 ??:? void std.stdio.StdioException.opCall() [0x4c8891]
 ??:? ulong std.stdio.readlnImpl(shared(core.stdc.stdio._IO_FILE)*, ref
 char[], dchar, std.stdio.File.Orientation) [0x4c89e5]

Judging frome the fact that the exception object does not contain a 
message, it must be coming from one of several of the following checks:

         if (ferror(fps))
             StdioException();

For example:

 
https://github.com/D-Programming-Language/phobos/blob/master/std/stdio.d#L4180

And the only meaning is that the input stream is in error state. :-/

Ali

sanjayss <dummy dummy.dummy> writes:

On Sunday, 21 February 2016 at 01:06:16 UTC, Ali Çehreli wrote:
 On 02/20/2016 04:45 PM, sanjayss wrote:
 [...]

 basically "line
 [...]

 is saying.
 [...]

 ioctls and
 [...]

 this, but
 [...]

 am doing
 [...]

 issue).
 [...]

 std.stdio.readlnImpl(shared(core.stdc.stdio._IO_FILE)*, ref
 [...]

 Judging frome the fact that the exception object does not 
 contain a message, it must be coming from one of several of the 
 following checks:

         if (ferror(fps))
             StdioException();

 For example:


 https://github.com/D-Programming-Language/phobos/blob/master/std/stdio.d#L4180

 And the only meaning is that the input stream is in error 
 state. :-/

 Ali

Thanks. That helps. I am making the stdin non-blocking (but 
reverting it back before doing the readln()) -- maybe that is 
causing some problems. Will follow this line of reasoning to see 
if I can figure out the problem.

sanjayss <dummy dummy.dummy> writes:

On Sunday, 21 February 2016 at 06:24:54 UTC, sanjayss wrote:
 On Sunday, 21 February 2016 at 01:06:16 UTC, Ali Çehreli wrote:
 [...]

 Thanks. That helps. I am making the stdin non-blocking (but 
 reverting it back before doing the readln()) -- maybe that is 
 causing some problems. Will follow this line of reasoning to 
 see if I can figure out the problem.

Just doing a "stdin.clearerr()" after switching back from 
non-blocking mode helped. Thanks again.