关于为什么这会导致 r 崩溃的任何想法？理想情况下，我在向上箭头前面没有文字，空格是可以接受的，但都是 segfault r.
ggplot2是版本 1.0.1。
library(ggplot2)
## Use suppressPackageStartupMessages to eliminate package startup messages.
df <- data.frame(x=1,y=1,label=".%up% y") ### <-- this works
ggplot(df, aes(x,y,label=label)) +
geom_point() + geom_text(hjust=-1,parse=TRUE)
df <- data.frame(x=1,y=1,label=" %up% y") ### <-- this crashes
ggplot(df, aes(x,y,label=label)) +
geom_point() + geom_text(hjust=-1,parse=TRUE)
*** caught segfault ***
address 0xfffffffffffffff8, cause 'memory not mapped'
...
R> R.version
_
platform x86_64-apple-darwin13.4.0
arch x86_64
os darwin13.4.0
system x86_64, darwin13.4.0
status
major 3
minor 1.3
year 2015
month 03
day 09
svn rev 67962
language R
version.string R version 3.1.3 (2015-03-09)
nickname Smooth Sidewalk
R>
编辑：根据评论中的要求在下方添加：
(buzz 506) $ r
R> library(ggplot2)
R> df <- data.frame(x=1,y=1,label=".%up% y") ### <-- this works
R> ggplot(df, aes(x,y,label=label)) +
+ geom_point() + geom_text(hjust=-1,parse=TRUE)
R> df <- data.frame(x=1,y=1,label=" %up% y") ### <-- this crashes
R> ggplot(df, aes(x,y,label=label)) +
+ geom_point() + geom_text(hjust=-1,parse=TRUE)
*** caught segfault ***
address 0xfffffffffffffff8, cause 'memory not mapped'
Traceback:
1: .Call("plyr_loop_apply", PACKAGE = "plyr", n, f)
2: loop_apply(n, do.ply)
3: llply(.data = pieces, .fun = .fun, ..., .progress = .progress, .inform = .inform, .parallel = .parallel, .paropts = .paropts)
4: dlply(layer_data, "PANEL", function(df) { panel_i <- match(df$PANEL[1], panel$layout$PANEL) layer$make_grob(df, scales = panel$ranges[[panel_i]], cs = plot$coord)}, .drop = FALSE)
5: (function (layer, layer_data) { if (nrow(layer_data) == 0) return() dlply(layer_data, "PANEL", function(df) { panel_i <- match(df$PANEL[1], panel$layout$PANEL) layer$make_grob(df, scales = panel$ranges[[panel_i]], cs = plot$coord) }, .drop = FALSE)})(dots[[1L]][[2L]], dots[[2L]][[2L]])
6: mapply(FUN = f, ..., SIMPLIFY = FALSE)
7: Map(build_grob, plot$layer, data)
8: ggplot_gtable(data)
9: print.ggplot(list(data = list(x = 1, y = 1, label = 1L), layers = list( <environment>, <environment>), scales = <S4 object of class "Scales">, mapping = list(x = x, y = y, label = label), theme = list(), coordinates = list(limits = list(x = NULL, y = NULL)), facet = list( shrink = TRUE), plot_env = <environment>, labels = list( x = "x", y = "y", label = "label")))
10: print(list(data = list(x = 1, y = 1, label = 1L), layers = list( <environment>, <environment>), scales = <S4 object of class "Scales">, mapping = list(x = x, y = y, label = label), theme = list(), coordinates = list(limits = list(x = NULL, y = NULL)), facet = list( shrink = TRUE), plot_env = <environment>, labels = list( x = "x", y = "y", label = "label")))
Possible actions:
1: abort (with core dump, if enabled)
2: normal R exit
3: exit R without saving workspace
4: exit R saving workspace
Selection: 2
(buzz 507) $ R
R> library(ggplot2)
R> sessionInfo()
R version 3.1.3 (2015-03-09)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.10.2 (Yosemite)
locale:
[1] C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] ggplot2_1.0.1
loaded via a namespace (and not attached):
[1] MASS_7.3-40 Rcpp_0.11.5 colorspace_1.2-6 digest_0.6.8 grid_3.1.3 gtable_0.1.2 labeling_0.3
[8] munsell_0.4.2 plyr_1.8.1 proto_0.3-10 reshape2_1.4.1 scales_0.2.4 stringr_0.6.2
R>