loader: fix crash on cha </dev/null

not a very useful operation, but crashing on it is definitely not the
correct reaction

(hyperfine does this for example. though in that case it's still better
to turn it off, otherwise Chawan will pointlessly open a new buffer for
it...)

1 files changed, 3 insertions, 1 deletions

diff --git a/src/loader/loader.nim b/src/loader/loader.nim
index c6177188..f444508f 100644
--- a/src/loader/loader.nim
+++ b/src/loader/loader.nim
@@ -273,7 +273,9 @@ proc loadStream(ctx: LoaderContext, handle: LoaderHandle, request: Request,
     doAssert fstat(fdp[], stats) != -1
     handle.istream = ps
     ctx.passedFdMap.del(request.url.host)
-    if S_ISREG(stats.st_mode): # probably stdin, like cha <file
+    if S_ISCHR(stats.st_mode) or S_ISREG(stats.st_mode):
+      # regular file: e.g. cha <file
+      # or character device: e.g. cha </dev/null
       handle.output.ostream.setBlocking(false)
       if handle.cached:
         ctx.addCacheFile(handle, originalUrl)