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authorDaniel Micay <danielmicay@gmail.com>2013-06-22 12:59:37 -0700
committerDaniel Micay <danielmicay@gmail.com>2013-06-22 12:59:37 -0700
commitdf166bae1ff583b39b4046becc87d28c9f90094b (patch)
treef671ebedd26d0b456118cc1b783f6bd33139c542 /src/libsyntax
parentef07d7c46e80fc607df81d8d572fe0c9881a4f42 (diff)
parentdf626ea137af1436cb2e5eda19c145363db801c9 (diff)
downloadrust-df166bae1ff583b39b4046becc87d28c9f90094b.tar.gz
rust-df166bae1ff583b39b4046becc87d28c9f90094b.zip
Merge pull request #7227 from alexcrichton/issue-7218
Fix compiling empty fmt! strings
Diffstat (limited to 'src/libsyntax')
-rw-r--r--src/libsyntax/ext/fmt.rs5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/libsyntax/ext/fmt.rs b/src/libsyntax/ext/fmt.rs
index 74496ac5359..4425d54987c 100644
--- a/src/libsyntax/ext/fmt.rs
+++ b/src/libsyntax/ext/fmt.rs
@@ -249,6 +249,11 @@ fn pieces_to_expr(cx: @ExtCtxt, sp: span,
         }
     }
 
+    /* Short circuit an easy case up front (won't work otherwise) */
+    if pieces.len() == 0 {
+        return cx.expr_str_uniq(args[0].span, @"");
+    }
+
     let fmt_sp = args[0].span;
     let mut n = 0u;
     let nargs = args.len();