From 203a9455c4695152fc5d0085bffeead9ce3216c2 Mon Sep 17 00:00:00 2001 From: Danny Milosavljevic Date: Tue, 30 May 2017 11:12:58 +0200 Subject: file-systems: Improve error reporting. Suggested by Chris Marusich . Fixes . * gnu/build/file-systems.scm (read-iso9660-primary-volume-descriptor): Improve error reporting. --- gnu/build/file-systems.scm | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'gnu/build/file-systems.scm') diff --git a/gnu/build/file-systems.scm b/gnu/build/file-systems.scm index 3b831c0ec0..3e0873377a 100644 --- a/gnu/build/file-systems.scm +++ b/gnu/build/file-systems.scm @@ -245,7 +245,12 @@ (define (read-iso9660-primary-volume-descriptor device offset) "Find and read the first primary volume descriptor, starting at OFFSET. Return #f if not found." (let* ((sblock (read-superblock device offset 2048 iso9660-superblock?)) - (type-code (if sblock (array-ref sblock 0) 255))) + (type-code (if sblock + (bytevector-u8-ref sblock 0) + (error (format #f + "Could not read ISO9660 primary +volume descriptor from ~s" + device))))) (match type-code (255 #f) ; Volume Descriptor Set Terminator. (1 sblock) ; Primary Volume Descriptor -- cgit v1.2.3