Out of memory when trying to parse a simple patch #101
Description
I'm trying to parse a patch between 1 and 1\n2, and I get OOM in node:
$ node
> require('diff').parsePatch('Index: \n===================================================================\n--- \n+++ \n@@ -1,1 +1,2 @@\n-1\n\\ No newline at end of file\n+1\n+2\n')
<--- Last few GCs --->
24024 ms: Scavenge 1419.3 (1476.8) -> 1419.3 (1476.8) MB, 0.3 / 0 ms (+ 2.0 ms in 1 steps since last GC) [allocation failure] [incremental marking delaying mark-sweep].
24988 ms: Mark-sweep 1419.3 (1476.8) -> 1419.0 (1476.8) MB, 964.8 / 0 ms (+ 3.0 ms in 2 steps since start of marking, biggest step 2.0 ms) [last resort gc].
26155 ms: Mark-sweep 1419.0 (1476.8) -> 1419.0 (1476.8) MB, 1167.0 / 0 ms [last resort gc].
<--- JS stacktrace --->
==== JS stack trace =========================================
Security context: 000003E2ABFE3AD1 <JS Object>
1: parseIndex(aka parseIndex) [C:\Users\Gabi\Work\dedo\www\node_modules\diff\lib\patch\parse.js:~13] [pc=0000035BE40D5B0C] (this=000003E2ABF04189 <undefined>)
2: parsePatch [C:\Users\Gabi\Work\dedo\www\node_modules\diff\lib\patch\parse.js:~6] [pc=0000035BE40C769F] (this=000003F143E6E4B9 <an Object with map 000003A58872F0D9>,uniDiff=0000028734AACC19 <St
ring[139]\: Index: \n============...
FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - process out of memory
I also tried it in the browser and it hangs, and also the npmjs.org testing utility fails: https://tonicdev.com/56b3841f8b1a9a0f005eec3b/56b8a9eaca44d40c003d191e
The patch is the result of require('diff').createPatch('', '1', '1\n2').
This seems to be related to fact that the file name is empty.