From @moritz

Error messages caused by programmer's mistakes shouldn't include stack
traces.

Rakudo r29047​:
../../parrot perl6.pbc -e 'my Int $x; $x = "str"'
Type check failed
current instr.​: 'parrot;Perl6Object;infix​:=' pc 59 (src/gen_builtins.pir​:52)
called from Sub '_block11' pc 93 (EVAL_12​:42)
called from Sub 'parrot;PCT​::HLLCompiler;eval' pc 806
(src/PCT/HLLCompiler.pir​:481)
called from Sub 'parrot;PCT​::HLLCompiler;command_line' pc 1305
(src/PCT/HLLCompiler.pir​:708)
called from Sub 'parrot;Perl6​::Compiler;main' pc 13152 (perl6.pir​:174)

IMHO the stack trace is mostly unnecessary line noise, and shouldn't be
visible to the programmer, since it obscures the real error message
(which could be improved ;-)

Typical examples of error messages are "Type check failed", parse
errors, 'Could not find non-existent sub' and 'Method 'foo' not found
for invocant of class 'Int''.

It might be a bit too early for this change because atm most users are
compiler writers at the same time, but when others start to use it on a
regular basis we should do our best not to confuse them.

Cheers,
Moritz

--
Moritz Lenz
http://moritz.faui2k3.org/ | http://perl-6.de/

From gp@zimt.uni-siegen.de

Hello!

There is a problem with the function "die" in Rakudo.

I tried the function "die" under Windows and Linux. Under both OS it
don't work.

Gerd Pokorra

[gz016@​pgerd parrot]$ ./parrot languages/perl6/perl6.pbc -e die
Died

current instr.​: 'die' pc 13123 (src/gen_builtins.pir​:8122)
called from Sub '_block11' pc 17 (EVAL_12​:11)
called from Sub 'parrot;PCT;HLLCompiler;eval' pc 851
(src/PCT/HLLCompiler.pir​:494)
called from Sub 'parrot;PCT;HLLCompiler;command_line' pc 1342
(src/PCT/HLLCompiler.pir​:721)
called from Sub 'parrot;Perl6;Compiler;main' pc 17106 (perl6.pir​:179)
[gz016@​pgerd parrot]$
[gz016@​pgerd parrot]$
[gz016@​pgerd parrot]$ svn info
Pfad​: .
URL​: http://svn.perl.org/parrot/trunk
Basis des Projektarchivs​: http://svn.perl.org/parrot
UUID des Projektarchivs​: d31e2699-5ff4-0310-a27c-f18f2fbe73fe
Revision​: 31923
Knotentyp​: Verzeichnis
Plan​: normal
Letzter Autor​: bernhard
Letzte geänderte Rev​: 31923
Letztes Änderungsdatum​: 2008-10-13 12​:45​:09 +0200 (Mo, 13 Okt 2008)

[gz016@​pgerd parrot]$

From @masak

pgerd (>)​:

There is a problem with the function "die" in Rakudo.

[...]

[gz016@​pgerd parrot]$ ./parrot languages/perl6/perl6.pbc -e die
Died

current instr.​: 'die' pc 13123 (src/gen_builtins.pir​:8122)
[...]

Looks perfectly normal to me. Are you concerned because you got a
stacktrace, and aren't used to getting one with Perl 5?

The RT System itself - Status changed from 'new' to 'open'

From gp@zimt.uni-siegen.de

Looks perfectly normal to me. Are you concerned because you got a
stacktrace, and aren't used to getting one with Perl 5?

Yes, that is the reason why I am concerned. To see a stacktrace is not
what I am expecting by using the "die" function.

Gerd Pokorra

From @jnthn

On Fri Jul 04 01​:39​:12 2008, moritz@​casella.verplant.org wrote​:

Error messages caused by programmer's mistakes shouldn't include stack
traces.

Rakudo r29047​:
../../parrot perl6.pbc -e 'my Int $x; $x = "str"'
Type check failed
current instr.​: 'parrot;Perl6Object;infix​:=' pc 59
(src/gen_builtins.pir​:52)
called from Sub '_block11' pc 93 (EVAL_12​:42)
called from Sub 'parrot;PCT​::HLLCompiler;eval' pc 806
(src/PCT/HLLCompiler.pir​:481)
called from Sub 'parrot;PCT​::HLLCompiler;command_line' pc 1305
(src/PCT/HLLCompiler.pir​:708)
called from Sub 'parrot;Perl6​::Compiler;main' pc 13152 (perl6.pir​:174)

IMHO the stack trace is mostly unnecessary line noise, and shouldn't be
visible to the programmer, since it obscures the real error message
(which could be improved ;-)

All stack trace into the compiler guts is now not shown at all now, and
that which is shown is at the sub/method level rather than exposing the
lexical scopes, and only has HLL line and file numbers in. In this
example the output is now just​:

Type mismatch in assignment; expected something matching type Int but
got something of type Str()
in Main (<unknown>​:1)

Thanks,

Jonathan

The RT System itself - Status changed from 'new' to 'open'

@jnthn - Status changed from 'open' to 'resolved'

From @masak

<masak> I'd just like to report that the stacktraces in Rakudo are back
to being insanely long.
<masak> I think they're even longer than when people were
complaining about them being far too long last time, and someone fixed
it.
<moritz_> and are also back to be totally useless
<masak> yes.
* masak submits rakudobug

Here's an example​:

$ perl6 lib/November/CGI.pm
Unable to parse blockoid, couldn't find final '}' at line 8
current instr.​: 'perl6;Regex;Cursor;FAILGOAL' pc 1664 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:907)
called from Sub 'perl6;Perl6;Grammar;blockoid' pc 53135
(src/gen/perl6-grammar.pir​:4334)
called from Sub 'perl6;Perl6;Grammar;pblock' pc 51952 (src/gen/perl6-
grammar.pir​:4002)
called from Sub 'perl6;Perl6;Grammar;circumfix​:sym<{ }>' pc 132791
(src/gen/perl6-grammar.pir​:24155)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;HLL;Grammar;circumfix' pc 2899 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:1190)
called from Sub 'perl6;HLL;Grammar;term​:sym<circumfix>' pc 2967
(ext/nqp-rx/src/stage0/HLL-s0.pir​:1219)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;term' pc 114072 (src/gen/perl6-
grammar.pir​:19605)
called from Sub 'perl6;HLL;Grammar;termish' pc 2350 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:1040)
called from Sub 'perl6;HLL;Grammar;EXPR' pc 1016 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:552)
called from Sub 'perl6;Perl6;Grammar;EXPR' pc 133525 (src/gen/perl6-
grammar.pir​:24358)
called from Sub 'perl6;Perl6;Grammar;statement' pc 50235
(src/gen/perl6-grammar.pir​:3481)
called from Sub 'perl6;Perl6;Grammar;statementlist' pc 49266
(src/gen/perl6-grammar.pir​:3185)
called from Sub 'perl6;Perl6;Grammar;blockoid' pc 53135
(src/gen/perl6-grammar.pir​:4334)
called from Sub 'perl6;Perl6;Grammar;block' pc 52782 (src/gen/perl6-
grammar.pir​:4241)
called from Sub 'perl6;HLL;Grammar;LANG' pc 1761 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:825)
called from Sub 'perl6;Perl6;Regex;codeblock' pc 180845
(src/gen/perl6-grammar.pir​:36478)
called from Sub 'perl6;Perl6;Regex;assertion​:sym<{ }>' pc 180597
(src/gen/perl6-grammar.pir​:36427)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Regex;P6Regex;Grammar;assertion' pc 18818
(ext/nqp-rx/src/stage0/P6Regex-s0.pir​:5090)
called from Sub 'perl6;Regex;P6Regex;Grammar;assertion​:sym<?>' pc
18852 (ext/nqp-rx/src/stage0/P6Regex-s0.pir​:5095)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Regex;P6Regex;Grammar;assertion' pc 18818
(ext/nqp-rx/src/stage0/P6Regex-s0.pir​:5090)
called from Sub 'perl6;Regex;P6Regex;Grammar;metachar​:sym<assert>'
pc 12629 (ext/nqp-rx/src/stage0/P6Regex-s0.pir​:3448)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Regex;P6Regex;Grammar;metachar' pc 6975
(ext/nqp-rx/src/stage0/P6Regex-s0.pir​:1914)
called from Sub 'perl6;Regex;P6Regex;Grammar;atom' pc 4066
(ext/nqp-rx/src/stage0/P6Regex-s0.pir​:1144)
called from Sub 'perl6;Regex;P6Regex;Grammar;quantified_atom' pc
3406 (ext/nqp-rx/src/stage0/P6Regex-s0.pir​:993)
called from Sub 'perl6;Regex;P6Regex;Grammar;termish' pc 3133
(ext/nqp-rx/src/stage0/P6Regex-s0.pir​:921)
called from Sub 'perl6;Regex;P6Regex;Grammar;nibbler' pc 2481
(ext/nqp-rx/src/stage0/P6Regex-s0.pir​:749)
called from Sub 'perl6;HLL;Grammar;LANG' pc 1761 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:825)
called from Sub 'perl6;Perl6;Grammar;regex_def' pc 106800
(src/gen/perl6-grammar.pir​:17851)
called from Sub 'perl6;Perl6;Grammar;regex_declarator​:sym<token>' pc
106056 (src/gen/perl6-grammar.pir​:17644)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;regex_declarator' pc 105650
(src/gen/perl6-grammar.pir​:0)
called from Sub 'perl6;Perl6;Grammar;term​:sym<regex_declarator>' pc
74051 (src/gen/perl6-grammar.pir​:9637)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;term' pc 114072 (src/gen/perl6-
grammar.pir​:19605)
called from Sub 'perl6;HLL;Grammar;termish' pc 2350 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:1040)
called from Sub 'perl6;HLL;Grammar;EXPR' pc 1016 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:552)
called from Sub 'perl6;Perl6;Grammar;EXPR' pc 133525 (src/gen/perl6-
grammar.pir​:24358)
called from Sub 'perl6;Perl6;Grammar;statement' pc 50235
(src/gen/perl6-grammar.pir​:3481)
called from Sub 'perl6;Perl6;Grammar;statementlist' pc 49266
(src/gen/perl6-grammar.pir​:3185)
called from Sub 'perl6;Perl6;Grammar;blockoid' pc 53135
(src/gen/perl6-grammar.pir​:4334)
called from Sub 'perl6;Perl6;Grammar;block' pc 52782 (src/gen/perl6-
grammar.pir​:4241)
called from Sub 'perl6;Perl6;Grammar;package_def' pc 84827
(src/gen/perl6-grammar.pir​:12454)
called from Sub
'perl6;Perl6;Grammar;package_declarator​:sym<grammar>' pc 83748
(src/gen/perl6-grammar.pir​:12156)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;package_declarator' pc 82655
(src/gen/perl6-grammar.pir​:11899)
called from Sub 'perl6;Perl6;Grammar;term​:sym<package_declarator>'
pc 72811 (src/gen/perl6-grammar.pir​:9311)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;term' pc 114072 (src/gen/perl6-
grammar.pir​:19605)
called from Sub 'perl6;HLL;Grammar;termish' pc 2350 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:1040)
called from Sub 'perl6;HLL;Grammar;EXPR' pc 1016 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:552)
called from Sub 'perl6;Perl6;Grammar;EXPR' pc 133525 (src/gen/perl6-
grammar.pir​:24358)
called from Sub 'perl6;Perl6;Grammar;statement' pc 50235
(src/gen/perl6-grammar.pir​:3481)
called from Sub 'perl6;Perl6;Grammar;statementlist' pc 49266
(src/gen/perl6-grammar.pir​:3185)
called from Sub 'perl6;Perl6;Grammar;comp_unit' pc 48710
(src/gen/perl6-grammar.pir​:3014)
called from Sub 'perl6;Perl6;Grammar;TOP' pc 38552
(src/gen/loader_pm.pir​:473)
called from Sub 'perl6;Regex;Cursor;parse' pc 282 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:181)
called from Sub 'perl6;HLL;Compiler;parse' pc 5 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:24)
called from Sub 'perl6;PCT;HLLCompiler;compile' pc 403
(compilers/pct/src/PCT/HLLCompiler.pir​:294)
called from Sub 'perl6;Perl6;Module;Loader;_block119' pc 35081
(src/gen/locator_pm.pir​:168)
called from Sub 'perl6;Perl6;Module;Loader;_block90' pc 34921
(src/gen/locator_pm.pir​:107)
called from Sub 'perl6;Perl6;Module;Loader;need' pc 34433
(src/gen/role_pm.pir​:845)
called from Sub 'perl6;Perl6;Actions;need' pc 184680 (src/gen/perl6-
grammar.pir​:37571)
called from Sub 'perl6;Perl6;Actions;statement_control​:sym<use>' pc
199422 (src/gen/perl6-actions.pir​:2058)
called from Sub 'perl6;Regex;Cursor;!reduce' pc 975 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:624)
called from Sub 'perl6;Regex;Cursor;!cursor_pass' pc 541 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:340)
called from Sub 'perl6;Perl6;Grammar;statement_control​:sym<use>' pc
64724 (src/gen/perl6-grammar.pir​:7401)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;statement_control' pc 56753
(src/gen/perl6-grammar.pir​:5259)
called from Sub 'perl6;Perl6;Grammar;statement' pc 50235
(src/gen/perl6-grammar.pir​:3481)
called from Sub 'perl6;Perl6;Grammar;statementlist' pc 49266
(src/gen/perl6-grammar.pir​:3185)
called from Sub 'perl6;Perl6;Grammar;package_def' pc 84827
(src/gen/perl6-grammar.pir​:12454)
called from Sub 'perl6;Perl6;Grammar;package_declarator​:sym<class>'
pc 83395 (src/gen/perl6-grammar.pir​:12068)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;package_declarator' pc 82655
(src/gen/perl6-grammar.pir​:11899)
called from Sub 'perl6;Perl6;Grammar;term​:sym<package_declarator>'
pc 72811 (src/gen/perl6-grammar.pir​:9311)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;term' pc 114072 (src/gen/perl6-
grammar.pir​:19605)
called from Sub 'perl6;HLL;Grammar;termish' pc 2350 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:1040)
called from Sub 'perl6;HLL;Grammar;EXPR' pc 1016 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:552)
called from Sub 'perl6;Perl6;Grammar;EXPR' pc 133525 (src/gen/perl6-
grammar.pir​:24358)
called from Sub 'perl6;Perl6;Grammar;statement' pc 50235
(src/gen/perl6-grammar.pir​:3481)
called from Sub 'perl6;Perl6;Grammar;statementlist' pc 49266
(src/gen/perl6-grammar.pir​:3185)
called from Sub 'perl6;Perl6;Grammar;comp_unit' pc 48710
(src/gen/perl6-grammar.pir​:3014)
called from Sub 'perl6;Perl6;Grammar;TOP' pc 38552
(src/gen/loader_pm.pir​:473)
called from Sub 'perl6;Regex;Cursor;parse' pc 282 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:181)
called from Sub 'perl6;HLL;Compiler;parse' pc 5 (ext/nqp-
rx/src/stage0/HLL-s0.pir​:24)
called from Sub 'perl6;PCT;HLLCompiler;compile' pc 403
(compilers/pct/src/PCT/HLLCompiler.pir​:294)
called from Sub 'perl6;Perl6;Module;Loader;_block119' pc 35081
(src/gen/locator_pm.pir​:168)
called from Sub 'perl6;Perl6;Module;Loader;_block90' pc 34921
(src/gen/locator_pm.pir​:107)
called from Sub 'perl6;Perl6;Module;Loader;need' pc 34433
(src/gen/role_pm.pir​:845)
called from Sub 'perl6;Perl6;Actions;need' pc 184680 (src/gen/perl6-
grammar.pir​:37571)
called from Sub 'perl6;Perl6;Actions;statement_control​:sym<use>' pc
199422 (src/gen/perl6-actions.pir​:2058)
called from Sub 'perl6;Regex;Cursor;!reduce' pc 975 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:624)
called from Sub 'perl6;Regex;Cursor;!cursor_pass' pc 541 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:340)
called from Sub 'perl6;Perl6;Grammar;statement_control​:sym<use>' pc
64724 (src/gen/perl6-grammar.pir​:7401)
called from Sub 'perl6;Regex;Cursor;!protoregex' pc 1752 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:971)
called from Sub 'perl6;Perl6;Grammar;statement_control' pc 56753
(src/gen/perl6-grammar.pir​:5259)
called from Sub 'perl6;Perl6;Grammar;statement' pc 50235
(src/gen/perl6-grammar.pir​:3481)
called from Sub 'perl6;Perl6;Grammar;statementlist' pc 49266
(src/gen/perl6-grammar.pir​:3185)
called from Sub 'perl6;Perl6;Grammar;comp_unit' pc 48710
(src/gen/perl6-grammar.pir​:3014)
called from Sub 'perl6;Perl6;Grammar;TOP' pc 38552
(src/gen/loader_pm.pir​:473)
called from Sub 'perl6;Regex;Cursor;parse' pc 282 (ext/nqp-
rx/src/stage0/Regex-s0.pir​:181)
called from Sub 'perl6;HLL;Compiler;parse' pc -1 ((unknown file)​:-1)
called from Sub 'perl6;PCT;HLLCompiler;compile' pc 403
(compilers/pct/src/PCT/HLLCompiler.pir​:294)
called from Sub 'perl6;PCT;HLLCompiler;eval' pc 1007
(compilers/pct/src/PCT/HLLCompiler.pir​:563)
called from Sub 'perl6;PCT;HLLCompiler;evalfiles' pc 1318
(compilers/pct/src/PCT/HLLCompiler.pir​:714)
called from Sub 'perl6;PCT;HLLCompiler;command_line' pc 1504
(compilers/pct/src/PCT/HLLCompiler.pir​:801)
called from Sub 'perl6;Perl6;Compiler;main' pc -1 ((unknown file)​:-1)

That's a record in insanity. :(

@masak - Status changed from 'resolved' to 'open'

From @moritz

We now have nice, Perl 6-level-only backtraces in Rakudo, so I'm closing
this ticket again.

@moritz - Status changed from 'open' to 'resolved'