On Thu, Mar 16, 2023 at 5:24 PM Ian Lance Taylor <i...@golang.org> wrote:
>
> [ + jba ]
>
> On Thu, Mar 16, 2023 at 8:56 AM Chandra S. Rangavajjula (Nokia)
> <chandra.s.rangavajj...@nokia.com> wrote:
> >
> > Hi,
> > I am using glog in my application development. With the latest tag
> > (https://github.com/golang/glog/releases/tag/v1.1.0), there started a new
> > panic error with -vmodule. This issue was not there in older version.
Thanks for the report. The panic stems from the flag package trying to
call .String on the mentioned glog.vModuleFlag type. I'll fix this
internally and publish a new version soon.
> >
> > ########################################################################################################################
> > Error:-
> > ########################################################################################################################
> > $./tst --help
> > usage: example -stderrthreshold=[INFO|WARNING|FATAL] -log_dir=[string]
> > -alsologtostderr
> > log to standard error as well as files
> > -log_backtrace_at value
> > when logging hits line file:N, emit a stack trace
> > -log_dir string
> > If non-empty, write log files in this directory
> > -log_link string
> > If non-empty, add symbolic links in this directory to the log files
> > -logbuflevel int
> > Buffer log messages logged at this level or lower (-1 means don't
> > buffer; 0 means buffer INFO only; ...). Has limited applicability on
> > non-prod platforms.
> > -logtostderr
> > log to standard error instead of files
> > -stderrthreshold value
> > logs at or above this threshold go to stderr (default 2)
> > -v value
> > log level for V logs
> > -vmodule value
> > comma-separated list of pattern=N settings for file-filtered logging
> >
> > panic calling String method on zero glog.vModuleFlag for flag vmodule:
> > runtime error: invalid memory address or nil pointer dereference
> >
> > ########################################################################################################################
> > Example code:-
> > ########################################################################################################################
> > package main
> >
> > import (
> > "github.com/golang/glog"
> > "os"
> > "flag"
> > "fmt"
> > )
> >
> > func usage() {
> > fmt.Fprintf(os.Stderr, "usage: example
> > -stderrthreshold=[INFO|WARNING|FATAL] -log_dir=[string]\n", )
> > flag.PrintDefaults()
> > os.Exit(2)
> > }
> >
> > func init() {
> > flag.Usage = usage
> > // NOTE: This next line is key you have to call flag.Parse() for the
> > command line
> > // options or "flags" that are defined in the glog module to be picked up.
> > flag.Parse()
> > }
> >
> > func main() {
> > number_of_lines := 100000
> > for i := 0; i < number_of_lines; i++ {
> > glog.V(2).Infof("LINE: %d", i)
> > message := fmt.Sprintf("TEST LINE: %d", i)
> > glog.Error(message)
> > }
> > glog.Flush()
> > }
> > ########################################################################################################################
> >
> > Regards,
> > Chandra R
> >
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>
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