— Minecraft Crash Report ----
// Oh - I know what I did wrong!

Time: 10/29/17 10:07 PM
Description: Initializing game

java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:3332)
at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137)
at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121)
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:569)
at java.lang.StringBuffer.append(StringBuffer.java:369)
at java.io.BufferedReader.readLine(BufferedReader.java:370)
at java.io.BufferedReader.readLine(BufferedReader.java:389)
at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1294)
at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1248)
at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1229)
at bid.a(SourceFile:787)
at bid.<init>(SourceFile:376)
at bib.aq(SourceFile:443)
at bib.a(SourceFile:404)
at net.minecraft.client.main.Main.main(SourceFile:123)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Thread: Client thread
Stacktrace:
at java.util.Arrays.copyOf(Arrays.java:3332)
at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137)
at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121)
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:569)
at java.lang.StringBuffer.append(StringBuffer.java:369)
at java.io.BufferedReader.readLine(BufferedReader.java:370)
at java.io.BufferedReader.readLine(BufferedReader.java:389)
at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1294)
at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1248)
at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1229)
at bid.a(SourceFile:787)
at bid.<init>(SourceFile:376)
at bib.aq(SourceFile:443)

– Initialization –
Details:
Stacktrace:
at bib.a(SourceFile:404)
at net.minecraft.client.main.Main.main(SourceFile:123)

– System Details –
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 443103568 bytes (422 MB) / 754974720 bytes (720 MB) up to 1073741824 bytes (1024 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.12.2
LWJGL: 2.9.4
OpenGL: ~_ERROR~ RuntimeException: No OpenGL context found in the current thread.
GL Caps:
Using VBOs: ~_ERROR~ NullPointerException: null
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: ~_ERROR~ NullPointerException: null
Current Language: ~_ERROR~ NullPointerException: null
Profiler Position: N/A (disabled)
CPU: <unknown>

Voila ce que ca me met merci de me proposer un solution