Issues with ggplot2 in Preview Release

I ran into an issue with RStudio's preview release v1.2.1047 (whose Python support is fantastic, btw! thanks!) that I wanted to get in as feedback. reprex doesn't seem to be working (I'll like @jennybryan know on GitHub), but here is what is needed to reproduce this behavior:

library(ggplot2)

# create data frame
popPlot <- data.frame(
  year = c(1900, 1910, 1920, 1930, 1940, 1950, 1960, 1970, 1980, 1990, 2000, 2010, 2016),
  pop = c(575238, 687029, 772897, 821960, 816048, 856796, 750026, 622236, 452801, 396685,
          348189, 319294, 311404)
)

If I create my plot with no breaks in the scale_y_continuous or labs arguments like I have below, the plot builds just fine:

# plot data
ggplot(data = popPlot, aes(x = year, y = pop)) +
  geom_line(color = "#349E8B", size = 2) +
  scale_x_continuous(breaks = c(1900, 1920, 1940, 1960, 1980, 2000, 2016)) +
  scale_y_continuous(breaks = c(300000, 400000, 500000, 600000, 700000, 800000, 900000), labels = c(300, 400, 500, 600, 700, 800, 900), limits = c(300000, 900000)) +
  labs(title = "St. Louis's Population, 1900-2016", x = "Year", y = "Population (thousands)")

However, I like my ggplot calls to be a bit more readable, so I normally build them this way:

# plot data
ggplot(data = popPlot, aes(x = year, y = pop)) +
  geom_line(color = "#349E8B", size = 2) +
  scale_x_continuous(breaks = c(1900, 1920, 1940, 1960, 1980, 2000, 2016)) +
  scale_y_continuous(
    breaks = c(300000, 400000, 500000, 600000, 700000, 800000, 900000),
    labels = c(300, 400, 500, 600, 700, 800, 900),
    limits = c(300000, 900000)) +
  labs(
    title = "St. Louis's Population, 1900-2016",
    x = "Year",
    y = "Population (thousands)")

That code, however, results in a number of errors:

>     breaks = c(300000, 400000, 500000, 600000, 700000, 800000, 900000),
Error: unexpected ',' in "    breaks = c(300000, 400000, 500000, 600000, 700000, 800000, 900000),"
>     labels = c(300, 400, 500, 600, 700, 800, 900),
Error: unexpected ',' in "    labels = c(300, 400, 500, 600, 700, 800, 900),"
>     limits = c(300000, 900000)) +
Error: unexpected ')' in "    limits = c(300000, 900000))"
>   labs(
+

I checked this code in R outside of RStudio and it works just fine. It was also working in the last stable version of RStudio.

Hmm…have you tried the daily? Here's the reprex for your code above in 1.2.1049

library(ggplot2)

# create data frame
popPlot <- data.frame(
  year = c(1900, 1910, 1920, 1930, 1940, 1950, 1960, 1970, 1980, 1990, 2000, 2010, 2016),
  pop = c(575238, 687029, 772897, 821960, 816048, 856796, 750026, 622236, 452801, 396685,
          348189, 319294, 311404)
)

# plot data
ggplot(data = popPlot, aes(x = year, y = pop)) +
  geom_line(color = "#349E8B", size = 2) +
  scale_x_continuous(breaks = c(1900, 1920, 1940, 1960, 1980, 2000, 2016)) +
  scale_y_continuous(breaks = c(300000, 400000, 500000, 600000, 700000, 800000, 900000), labels = c(300, 400, 500, 600, 700, 800, 900), limits = c(300000, 900000)) +
  labs(title = "St. Louis's Population, 1900-2016", x = "Year", y = "Population (thousands)")


# plot data
ggplot(data = popPlot, aes(x = year, y = pop)) +
  geom_line(color = "#349E8B", size = 2) +
  scale_x_continuous(breaks = c(1900, 1920, 1940, 1960, 1980, 2000, 2016)) +
  scale_y_continuous(
    breaks = c(300000, 400000, 500000, 600000, 700000, 800000, 900000),
    labels = c(300, 400, 500, 600, 700, 800, 900),
    limits = c(300000, 900000)) +
  labs(
    title = "St. Louis's Population, 1900-2016",
    x = "Year",
    y = "Population (thousands)")

Created on 2018-10-12 by the reprex package (v0.2.1.9000)

Thanks @mara - I was on the one from the preview release page. I'll switch to the daily build today, though. Also glad to see that reprex is working on the daily!