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Error in fetch(key) : lazy-load database '�' is corrupt #419

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lucacerone opened this issue Jan 27, 2014 · 7 comments · Fixed by #1001
Closed

Error in fetch(key) : lazy-load database '�' is corrupt #419

lucacerone opened this issue Jan 27, 2014 · 7 comments · Fixed by #1001

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@lucacerone
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The documentation is not reloaded properly when changes are made.

For example:

library(devtools)
dev_mode()
document("mypackage")
install("mypackage")
?some_function # shows the documentation correctly

# I keep working and make modifications to the documentation of "some_function".
# I want to update the documentation and the package so I issue:

detach("package:mypackage", unload = TRUE)
document("mypackage")
install("mypackage")
?some_function

Now the documentation shows

"Error in fetch(key) : lazy-load database '�' is corrupt"

However if I restart my R session the documentation is visualized correctly.
@hadley
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hadley commented Jan 27, 2014

Unfortunately this is a base R problem. We've reported it, but R core is not interested in fixing it.

@hadley hadley closed this as completed Jan 27, 2014
@kendonB
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kendonB commented Apr 15, 2015

If anyone cares, I also have this problem.

@WilliamKinaan
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This problem is making me crazy, yet no solution

@hadley
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hadley commented May 25, 2015

Either just use load_all() or use Build & Reload (in Rstudio, other IDEs may have something similar)

jimhester added a commit to jimhester/devtools that referenced this issue Dec 23, 2015
@jimhester
Unregister S3 methods explicitly
f2f077b 
This is a workaround for a bug in base R. unloadNamespace does not
unregister any S3 methods, so the promises are invalid if you install a
new version of a package, try to unload and re-load the package.

See https://stat.ethz.ch/pipermail/r-devel/2015-December/072150.html for
more details and a reproducible example.

This fixes the common lazy-load errors people often run into when trying
to use devtools' install functions.

Fixes r-lib#419, r-lib#503, r-lib#942, r-lib#631
@jimhester jimhester mentioned this issue Dec 23, 2015
Merged
hadley added a commit that referenced this issue Dec 24, 2015
@hadley
Merge pull request #1001 from jimhester/unload_lazy
8ad299f 
Unregister S3 methods explicitly.

Fixes #419, #503, #942, #631
@danielecook
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I get this error message constantly - any idea why this is happening so I can try to avoid it?

@jimhester
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@danielecook Are you using the latest version of devtools? Can you provide your devtools::session_info(). Also in order to figure out the cause you need to provide the full error message including traceback.

@MKLau MKLau mentioned this issue Jan 11, 2017
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@lock
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lock bot commented Sep 18, 2018

This old issue has been automatically locked. If you believe you have found a related problem, please file a new issue (with reprex) and link to this issue. https://reprex.tidyverse.org/

@lock lock bot locked and limited conversation to collaborators Sep 18, 2018
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Unregister S3 methods explicitly jimhester/devtools
6 participants
@hadley @jimhester @lucacerone @danielecook @kendonB @WilliamKinaan