vimshell does not always handle ${variable} correctly.

[yzhuang]

To reproduce, try:

export HOME=/Users/yz/
echo $HOME     # this works
echo ${HOME}   # this also works
echo ${HOME}bin  # this does not work

Screenshot attached comparing bash/zsh behavior and vimshell behavior.

[Shougo]

Confirmed. It is bug.

[ujihisa]

Another bug

$ echo "${HOME}bin"
${HOME}bin

This should be expanded, since the quote is not ' but ".